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A 2020 decemberében kihirdetett új 2020/2184/EU irányelv az ivóvíz minőségére vonatkozóan több új előírás között a cianobaktérium-toxinokra vonatkozó szabályozást is tartalmaz. Jelen tanulmány célja összefoglalni a cianobaktériumok és az algavirágzás ivóvíz-szolgáltatásra gyakorolt hatásaival kapcsolatos műszaki-tudományos ismereteket, és ezek tükrében, más országokban alkalmazott előírásokkal összehasonlítva elemezni a hazai hiányosságokat és megoldási lehetőségeket. Bár a Balaton vízminősége az ezredforduló után javult, a szélsőségesebb környezeti feltételek között időszakosan előforduló algavirágzások ráirányították a figyelmet arra, hogy a probléma máig fennáll és fennállhat jövőben is. A nemzetközi szakirodalomban közölt adatok és a balatoni felszíni vízbeszerzés helyzetét vizsgálva megállapítható, hogy az EU-s és a hazai szabályozás részletességében elmarad egyes országokétól, ahol a cianobaktériumok problémája fokozottan fennáll. Ellenben a magyarországi viszonyok várhatóan nem fogják indokolni az előírások szigorítását, a szakszerű üzemeltetési kultúra és a jövőbeni vízgazdálkodási fejlesztések miatt, amelyek a probléma kiváltó okát megszüntetik azzal, hogy ivóvíztermelésre nem a cianobaktériumok megjelenésének kitett felszíni vizet használjuk fel.

The revision of the Drinking Water Directive (DWD), which the process of consultation by the European Parliament is coming to the end, includes a commitment for all Member States to assess the level of water leakage. The overarching aim of this action is to reduce water loss through leaks. In regard to this, use of performance indicators as suitable to enable assessment of water utility performance with regard to leakage reduction, including impacts on environment and cost-efficiency, is recommended. The paper provides results from water losses evaluation with the set of performance indicators (PI), considering dependence on the availability of resources and specific operating conditions. An analysis of different PI that are necessary to evaluate in most of leakage reduction methods was conducted considering step-by-step approach. Furthermore, the most relevant data for leakage analysis and management on a network level was determined. Presented PI can be used to improve leakage management of small water supply system. Similarly as in the Deming cycle, the described tool provides for planning activities, executing activities in accordance with the plan, checking the degree of execution of objectives included in the plan, and on the basis of conducted analyses and lessons learned, the so-called improvement. The results of the analysis lead to the conclusion that through a comprehensive, systematically improved strategy, the high effectiveness of the system could be reach. The reliable monitoring does not have to be based on advanced technological methods, which are often unavailable for small water supply system, due to high investment and operating costs. The results indicate that integrated IT systems, as SCADA, might not be directly beneficial to water loss management in small networks with moderate leakage levels.

It is common for bottled water and other assorted drinks to be seen displayed outside stores and in the sun in most parts of Nigeria. The country is mostly hot year-round, and over the course of the year, temperatures can rise to as high as 40 ∘C around March–April in the study area. The leaching effect of chemicals from polyethylene terephthalate (PET) bottled water was investigated for five commercially available bottled water brands. Temperature, pH, antimony, bisphenol A (BPA), and nitrate levels were measured on days 0, 14, and 28 for control samples and samples exposed to direct sunlight, using destructive sampling technique. Antimony was not detected in brands A, B, and E in the baseline measurement at day 0, while brands C and D had low values; after 28 d all the control samples still had antimony levels within the United States Environmental Protection Agency (US EPA) standard. Meanwhile, all the samples exposed to sunlight exceeded US EPA standard levels at 14 and 28 d, except brand A which was within limit at 14 d with value of 4.59 µg L−1. All control and exposed samples were below the European Union Drinking Water Directive (EU DWD) total daily intake (TDI) of BPA (0.05 mg per kilogram of body weight)−1 d−1. Values obtained for nitrate showed that all control samples did not exceed the US EPA guideline level for nitrates in drinking water for days 0, 14, and 28, while three of the samples, i.e. brands C, D, and E, exceeded the guideline level at day 28. Exposure of bottled water to sunlight was seen to impair the quality of the water for consumption.

Until very recently, in the debates on water in the Spanish and European context, the concept of the Human Right to Water and Sanitation (HRWS) evoked foreign realities, typical of Latin American countries or other regions of the global south. However, since the beginning of the Great Recession in 2008, as a result of the consequent emergence of situations of poverty and precariousness, the concern to defend the recognition and implementation of this right became present. The declaration of the HRWS by the United Nations in 2010 (United Nations 2010a,2010b), coinciding with this historical juncture, has promoted processes and debates around its effective implementation at an international, European and Spanish level. The current health crisis and the consequent economic debacle caused by the COVID-19 at the beginning of 2020 have updated the urgency of the debate on the HRWS. In 2015, the plenary session of the European Parliament supported the citizens' initiative Right2Water, which sought to guarantee the right to water for all people and the transposition of the HRWS into the legislation of member states. The current reform process of the Drinking Water Directive (98/83/EC) is justified, among other reasons, by the need to adapt these regulations to the aforementioned commitment to coherence. The Right2Water initiative was transferred to Spain, mainly thanks to the encouragement of the Association of Public Water Supply and Sanitation Operators (Asociacion de Operadores Publicos de Abastecimiento y Saneamiento Agua, AEOPAS), within the framework of the statewide Public Water Network (Red Agua Publica, RAP), through the Social Pact for Public Water (Pacto Social por el Agua Publica, PSAP). The effects of the crisis also coincided with privatization processes of water services that, justified by austerity policies, European institutions promoted in the countries most affected by the crisis, despite strong social opposition. In some of these countries, such as Spain, the process of privatization has been especially related to the seek of funding by municipalities in crisis, through the perverse mechanism of the ‘concession fee’, which allows for a rapid injection of money into the municipal treasury in exchange for a decades-long privatization of the service. This process is usually accompanied by increasing rates and greater pressure on users with payment problems. The relations between the causes and consequences of the crisis and privatization, as well as the emergence of situations of water poverty of different types, have led to the present existence of a social movement, with a solid discourse that is committed to defending the human right to water, as well as the model of public management, in our cities. At the same time, the existence of public water management companies, which formally maintain public ownership of the service but practice a mercantile management style (priority of profit and loss accounts, opacity, consideration of users as clients) has led to demands to renew public management models to guarantee compliance with the human right to water in a broad and deep sense, redefined in an antagonistic way: a recognition of access to drinking water and sanitation as a human right rigorously conceived that puts into question the neoliberal logic of managing water services. This is one of the core arguments this article addresses: the HRWS today constitutes the banner of a movement that is articulated around the concept of water as a common good and that is oriented towards the objective of building a collaborative and transparent model of public management. The ownership of water and sanitation services operators (in their different modalities, from strictly public to strictly private formulas) is related to the implementation of the HRWS, which contributes to the reactivation of debates on the need to preserve or recover (‘remunicipalizacion’) the public character of these services, and with the need to generate legal frameworks that guarantee effective local democratic policies. To this social dimension, committed to the public and democratic dimension, open to new debates on common goods management, another characteristic is added: the human rights movement in Spain has been in tune from its beginnings in discourse and organizational structure with socio-eco-integrating perspectives of natural resources, aquatic ecosystems management, which is at the foundation of the possibility of implementing the human right to water. This is a relevant and somewhat distinctive quality of the Spanish experience, which contrasts with the unfortunate, although historically explainable, disagreements and conflicts that frequently characterize the social and environmental perspectives in the movements in defense of water. In addition to the above, this article presents a new approach to the typology of water poverties. Until recently, the efforts that have been carried out in the implementation of the HRWS have been focused especially on accessibility, condemning and trying to alleviate the deficits in supply and sanitation coverage in the Global South. In contrast, its recent reception in European countries has focused especially on affordability (prohibition of cuts, guarantee of a vital minimum, social rates) and on implications for governance (transparency, accountability) and the management model (public versus private). However, throughout this research it has been found that accessibility remains a significant problem in certain European regions, especially related to the existence of marginal settlements, slums, homelessness, temporary immigrant workers in rural areas, etc. The problem of HRWS is thus situated in the broader context of access to housing and dignified living conditions, and is related to the marginalization and exclusion of groups or social sectors, due to various factors, generally combined, of economic, cultural and/or ethnic nature. Finally, another issue that this article addresses is the question of the legal regulation of the human right to water in Spain. It will seem strange to a non-expert observer of this matter that after the intense concern, organization and reflection on the subjects that have been mentioned, and which are presented in detail below, and in a country with such a long tradition of water policy and legislation as Spain, we lack a state or autonomic-wide regulatory framework for the management of urban water. And not only do we still lack this or these framework(s) but we have been discussing their need for many years (the jurisdictions and responsibilities over the urban cycle are municipal) and, if they are really needed, their nature, contents and scale of formulation. The article analyzes the keys to this process and ends by presenting the latest propositions on this subject from the HRWS social movement in which its authors are conceptually situated. From a theoretical (urban political ecology) and methodological (transdisciplinary participatory research-action) point of view, the article has been developed in the double framework in which the authors operate. On the one hand, the working group on the urban water cycle of the New Water Culture Foundation (Fundacion Nueva Cultura del Agua) and, on the other, the Research Networks of Excellence of the National Research Agency on water poverty (WAPONET, CSO2017-90702-REDT), made up of researchers from seven Spanish universities (Universidad Autonoma de Barcelona, Politecnica de Catalunya, Oberta de Catalunya, Jaume I de Castellon, Alicante, Oviedo, Granada y Sevilla). As a space for transdisciplinary action-participation on which this work has been specifically based, mention should be made of the Andalusian Social Committee on Water (Mesa Social del Agua de Andalucia), whose composition and main activities between 2017 and 2020 are reflected throughout these pages. We owe information, ideas and experiences to all the colleagues who participate in these spaces, where we carried out a real process of co-production of knowledge, throughout years of work in common.

In 2020, the new European Drinking Water Directive will be updated to include new drinking-water safety parameters. These will introduce reduced thresholds for the presence of heavy metals, pesticides and other contaminants in domestic drinking water. The aim of these reduced thresholds is to impose a higher level of consumer protection as well as provide guidance for effective monitoring, planning and water management. An example of a newly proposed threshold is the concentration of lead ions (Pb2+) within drinking water, which has been reduced from 10 to 5 parts per billion (ppb). The strict timeframe for water suppliers to meet the new thresholds has created an impetus to develop in situ detection techniques to quantify the levels of chemical contamination on-site in drinking water, allowing them to make prompt interventions. This review explores and discusses the current advances related to electrochemical methods, electrode materials and modifications that have the potential to be the foundations of a new generation of portable electrochemical sensors towards trace-level ion in situ heavy metal sensors.

The foundation of the Alliance of Community-Owned Water Services in Europe (ACOWAS-EU), established during the consultation period for the 2020 recast of the European Drinking Water Directive, has shone a new light on community-owned drinking water supplies (CoDWS). CoDWS are drinking water supplies that are administered, managed, and owned by the local community membership that each supply serves. This paper reviews the presence of CoDWS within the five founding regions of ACOWAS-EU—Austria, Denmark, Finland, Galicia in Spain, and Ireland—and the co-operative model structure that underpins the sector. Although the co-operative structure for CoDWS has been prominent since the mid-20th century (and sometimes even earlier), there is a dearth of research into the sector’s importance and existence in an international context. Through a detailed case study, the Irish CoDWS sector (known in Ireland as the group water scheme sector) is analysed in depth, in terms of both its evolution and the opportunities and challenges it faces today. Areas, such as water quality, biodiversity, education, and community-involvement are discussed in particular, providing key learnings that may also be of benefit to the other CoDWS sectors within ACOWAS-EU and further afield.

Since 2017, risk assessments for water intakes in Poland have provided the basis for decisions to establish indirect water protection zones. The preventive, risk-based approach and the related risk minimization measures are required under the provisions of the Drinking Water Directive (DWD) of the European Parliament and of the Council of 16 December 2020 on the quality of water intended for human consumption. This approach is in line with the World Health Organization (WHO) recommendations for water safety plans. The aim of this study was to present a methodology and to carry out a risk assessment of the threats to surface water intakes, which in Poland, should be completed by the end of 2022. Risk assessments were performed for four onshore-type surface water intakes located in south-eastern Poland. The results were presented in aggregate form, which enabled clear presentation and conclusions. It was found that the greatest risks are associated with seasonal changes in water quality (mainly high turbidity and water blooms), unregulated sewage management, the occurrence of floodwater flows and catastrophic events caused by the potential failure of wastewater treatment plants. Based on the results of the risk assessment, the need to establish new, or to adjust the existing, protection zones for the analyzed water intakes was identified.

Drinking water quality is regulated by Regulation Concerning Water Intended for Human Consumption by Ministry of Health in Turkey. As in the process of becoming a member state of EU, Turkish regulation is compatible with EU Drinking Water Directive. This study revealed that there are 489 drinking water treatment plants, 397 of which are under operation. Within this work, identity cards for these active plants were prepared. Process selection of these plants were specified. A GIS-based program called ISBIS is developed and all data collected within this work is uploaded to the database. Site-visits to 193 selected plants were conducted and site-visit reports focusing on operational and structural issues at these plants are issued. As a result of this work, it appeared that 37 drinking water treatment plants out of 193 site-visited need to be reconstructed. Also, it was observed that most of the drinking water treatment plants are not capable of removing micropollutants, and will need major revisions.

In the agriculture intensive eastern region of England, plant protection products are widely applied to protect crops such as wheat and oilseed rape from pests and diseases, thus creating a risk of reaching nearby water courses through surface runoff. The EU Drinking Water Directive sets a stringent limit of 0.1 μg/l and 0.5 μg/l for individual and total pesticides respectively in treated potable water. However, peak metaldehyde levels have been persistently detected in raw water and reducing them to these limits has proven challenging and costly, in particular when using conventional treatment. In line with the EU Water Framework Directive, a more suitable approach and one adopted by the local water company, Anglian Water Services Ltd., would require moving towards mitigating pollution at source, preferably through participative action with multiple stakeholders in the agricultural industry. Initial findings demonstrate the potential of product substitution for reducing metaldehyde levels in surface waters. Reviewing Anglian Water's “Slug it Out” trial, we discuss key learnings derived from their experiences and make recommendations about the potential of the catchment approach to address the wider pesticide challenge.

The aim of this exploratory research and comparative numerical pilot study was to investigate any significant differences in the microbiological content of tap and bottled water through the measurement of risk indicator parameters including Enterococci, Escherichia coli (E. coli) and colony-forming units (CFUs). This study to investigate storage conditions and compare consumer options of public water supply and bottled water using microbiological limits was carried out for public health research. This was a unique pilot study to Northern Ireland with global relevance due to the increase in the bottled water market and the need to address the lack of consumer awareness regarding storage and microbiological content. No E. coli or Enterococci were found in any of the 31 tap or bottled water samples. Three unrefrigerated bottled water samples exceeded the threshold in Colony Counts 22°C & 37°C (degrees Celsius) and failed in line with Drinking Water Directive guidelines. This indicated a link between storage conditions and microbiological quality. No link between prices or microbiological quality was indicated. This research recommends the creation of a regulator for the bottled water industry, the need for clearly labelled microbiological content and daily testing. Water suppliers such as Northern Ireland (NI) Water should promote the quality of tap water. Recommendations are also outlined for consumers. There is no statistically significant difference in the microbiological quality of tap and bottled water in Northern Ireland despite marketing claims.

Pesticide pollution has raised public concern in Denmark due to potential negative health impacts and frequent findings of new substances after a recent expansion of the groundwater monitoring programme. Danish drinking water comes entirely from groundwater. Both the raw groundwater and the treated drinking water are regularly monitored, and the chemical analyses are reported to a publicly available national database (Jupiter). Based on these data, in this study we (1) provide a status of pesticide content in drinking water supplied by public waterworks in Denmark and (2) assess the proportion of Danish households exposed to pesticides from drinking water. ‘Pesticides’ here refers also to their metabolites, degradation and reaction products. The cleaned dataset represents 3004 public waterworks distributed throughout the country and includes 39 798 samples of treated drinking water analysed for 449 pesticides (971 723 analyses total) for the period 2002–2019. Of all these chemical analyses, 0.5% (n = 4925) contained a quantified pesticide (>0.03 μg/l). Pesticides were found at least once in the treated drinking water at 29% of all sampled public waterworks for the period 2002–2019 and at 21% of the waterworks for the recent period 2015–2019. We estimate that 56% of all Danish households were potentially exposed at least once to pesticides in drinking water at concentrations of 0.03–4.00 μg/l between 2002 and 2019. However, in 2015–2019, the proportion of the Danish households exposed to pesticides (0.03–4.00 μg/l) was 41%. The proportion of Danish households potentially exposed at least once to pesticides above the maximum allowed concentration (0.1 μg/l) according to the EU Drinking Water Directive (and the Danish drinking water standard) was 19% for 2002–2019 and 11% for 2015–2019. However, the maximum concentrations were lower than the World Health Organization’s compound-specific guidelines. Lastly, we explore data complexity and discuss the limitations imposed by data heterogeneity to facilitate future epidemiological studies.

Background The number of chemical parameters included in monitoring programs of water utilities increased in the last decade. In accordance with the European Drinking Water Directive, utilities aim at a tailored risk-based monitoring (RBM) program. Here, such a RBM program was developed for the largest Dutch water utility, mostly using groundwater as a source. Data from target analyses and high-resolution mass spectrometry-based suspect screening was used to cluster the different source waters. Targets were prioritized based on (preliminary) drinking water guideline values or the threshold of toxicological concern. Suspects were prioritized for further identity confirmation based on semi-quantitative occurrence concentrations combined with in vitro toxicity information. Finally, a RBM program was suggested for each cluster of source waters. Results Out of 731 target chemicals, 153 were detected at least once over a 5-year period. Roughly 10% of the detected non-target screening features matched to suspects. 108 source waters were clustered into 7 clusters. Source waters with low numbers and concentrations of organic chemicals were located in areas with all land-use types, while clusters of source waters with higher numbers of chemicals were related to infiltrated surface water. For perfluorinated chemicals, 25 suspects matched features detected in source waters and 7 features detected in drinking water. For the target chemicals, simple treatment showed the lowest and sorption-based techniques relatively high removal efficiencies. The chemical composition of all drinking waters related to non-contaminated source waters. (Preliminary) guideline values were available for 45 of the retrieved target chemicals, and used for prioritization for monitoring frequencies. These chemicals individually posed no appreciable concern to human health. Suspects were prioritized for further identity confirmation based on semi-quantitative occurrence in produced water, detection frequencies and information on toxic potency. Once confirmed and assessed as relevant, the suspects could be added to target monitoring. Conclusion This approach provided a feasible workflow for RBM of target chemicals for clusters of groundwater sources, connected to a feed of new relevant chemicals based on suspect screening.

Groundwater close to three municipal solid waste landfill sites in Sicily (southern Italy) was sampled to determine the presence of contaminants and the risk associated with its possible use as drinking and sanitary water. Polycyclic aromatic hydrocarbons, polychlorinated biphenyls, polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans, and metals were investigated. These target compounds are the most common pollutants present in leachates. Risk Assessment Guidance for Superfund (RAGS, US EPA) was used to assess human health risk. Ingestion, dermal, and total exposure to these xenobiotic contaminants in groundwater were evaluated, and the cancer and non-cancer risk indexes were calculated. The results revealed that, while the groundwater complied with Italian Drinking Water Directive 30/2001, it did not comply with the "good environmental state" criteria of Directive 30/2009 at two of the three sites investigated. Worrying results were revealed by the risk assessment at the investigated sites. Cancer and non-cancer risk indexes indicated a probable risk, mainly due to dermal exposure to groundwater. These results underline the importance of assessing the risk for all possible routes, evaluating not only ingestion but also dermal exposure, especially when organic pollutants are present. The results of this study show that human health risk has probably been underestimated in the past, as dermal exposure to organic pollutants has only rarely been evaluated in the literature.

The present contribution aims to provide a comprehensive account of Italian legislation on water quality and water protection through criminal law. The Italian legal regime on water quality largely builds on the overarching European Union framework, which includes the Water Framework Directive, the Drinking Water Directive and the Nitrates Directive. The path towards full implementation of European water policies in Italy has been, however, all but void of drawbacks and still entails remarkable shortcomings. Hence the Italian implementation of European directives in Italy will be addressed, with a view to highlighting the several nuances with regard to non-compliance and the extensive use of exemptions and derogations. Furthermore, this contribution will provide an overview of the fragmented Italian legal regime for criminalisation of water pollution as interpreted by Italian criminal courts. The upshot of this overview is the ultimate unfitness of the Italian criminal legal regime to adequately ensure water quality protection. Last, the far-reaching 2015 reform of the Criminal Code on environmental crimes is analysed, which arguably paves the way for a more coherent and ecosystem-oriented approach to water quality while strengthening coordination between administrative and criminal responses to water pollution.

© 2020, Springer-Verlag GmbH Germany, part of Springer Nature. Drinking water may contain radioactive substances that could present a risk to human health (WHO, Guidelines for drinking-water quality: fourth edition incorporating the first addendum. World Health Organization, Geneva, 2017). Of particular significance for human radiation exposure from drinking water are the naturally occurring radionuclides that originate from the elements of the thorium and uranium decay series, such as 226Ra and 228Ra. These radionuclides can arise in water from natural processes in the ground or human activities involving naturally occurring radioactive materials (WHO, Management of radioactivity in drinking water. World Health Organization, Geneva, 2018). The measurement of radioactivity in drinking water allows the determination of population exposure to radiation by the habitual consumption of water. The aim of this study was to determine gross alpha and gross beta activities, and 226Ra and 228Ra activity concentrations in 28 drinking water samples from the Vojvodina region, in order to check compliance with recent Serbian and European regulations. Gross alpha and beta activity in drinking water samples were determined according to ASTM D7283-06 Standard test method for alpha- and beta-activity in water by liquid scintillation counting (ASTM D7283-06, Standard test method for alpha- and beta- activity in water by liquid scintillation counting. ASTM International West Conshohocken PA, https://www.astm.org, 2006), and measured by PerkinElmer liquid scintillation counter Quantulus 1220. The activity of 226Ra and 228Ra was determined by low-level gamma-spectrometry, and assuming the radioactive equilibrium between 226 and 228Ra and their progenies. For the analyzed radionuclides activity concentration in the water samples dose calculations were carried out. Gross alpha activity for all presented water samples exceeded the recommended guideline activity concentrations of 0.1 Bq L−1 (WHO, Guidelines for drinking-water quality, 2nd edn. World Health Organization, Geneva, 1993). The activity concentrations for 226Ra in 13 of investigated samples are higher than the legally established levels for radionuclide content in drinking water in Serbia and EU (Official Gazette, Rulebook on limits of radionuclides content in drinking water, foodstuffs, feeding stuffs, medicines, general use products, construction materials and other goods that are put on market, 2013; EC, Council Directive 2013/51/EURATOM, 2013). In 16 water samples concentration of 228Ra is higher than recommended. In 20 investigated samples, total dose GD from radionuclides in drinking water is higher than 0.1 mSv year−1 (EC, European Drinking Water Directive 98/83/EC of 3 November 1998 European Commission on the quality of water intended for human consumption. Off J L, 1998). The cancer risk caused by the intake of radium isotopes in drinking water during the lifetime was estimated, and the obtaining results are ranged in the acceptable cancer incidence (WHO, Guidelines for drinking-water quality, 4th edn. World Health Organization, Geneva, 2011; EPA, Cancer risk coefficients for environmental exposures to radionuclides. Environmental Protection Agency, Washington, DC, 1999). The presence of 226Ra and 228Ra are explained on the basis of geological and hydrogeological characteristics of the Vojvodina region.

In several European countries and at the level of the European Union, we can observe political and societal attempts to promote the use of tap water. Most prominently, the European Commission proposed revisions for the Drinking Water Directive, which includes strategies for promoting the consumption of tap water. The strategies comprise the following: improving access to tap water, upgrading quality standards for tap water, and enhancing transparency concerning the benefits of tap water. National initiatives in European countries pursue similar strategies that concentrate on enhancing access to tap water and communicating its economic, environmental, and social benefits. By drawing on existent literature in different disciplines, we assess how promising these strategies are for inducing individuals to drink tap water rather than bottled water. Our overview reveals that our knowledge regarding the quality dimension is very good: numerous studies on European countries have shown that dissatisfaction with the sensory properties and health-related concerns prevent individuals from drinking (more) tap water and opting for bottled water instead. The body of research with a specific focus on Europe is significantly smaller concerning the other two dimensions: access to tap water and the benefits of tap water. Nonetheless, there is indicative and preliminary evidence that improved access to tap water and a better communication of the benefits of tap water could positively affect consumption patterns. This article is categorized under: Engineering Water > Sustainable Engineering of Water, Human Water > Water Governance, Human Water > Water as Imagined and Represented.

A plethora of in vitro bioassays are developed in the context of chemical risk assessment and clinical diagnostics to test effects on different biological processes. Such assays can also be implemented in effect‐based monitoring (EBM) of (drinking) water quality alongside chemical analyses. Effects‐based monitoring can provide insight into risks for the environment and human health associated with exposure to (unknown) complex, low‐level mixtures of micropollutants, which fits in the risk‐based approach that was recently introduced in the European Drinking Water Directive. Some challenges remain, in particular those related to selection and interpretation of bioassays. For water quality assessment, carcinogenesis, adverse effects on reproduction and development, effects on xenobiotic metabolism, modulation of hormone systems, DNA reactivity, and adaptive stress responses are considered the most relevant toxicological endpoints. An evaluation procedure of the applicability and performance of in vitro bioassays for water quality monitoring, based on existing information, has been developed, which can be expanded with guidelines for experimental evaluations. In addition, a methodology for the interpretation of in vitro monitoring data is required, because the sensitivity of specific in vitro bioassays in combination with sample concentration may lead to responses of chemicals (far) below exposure concentrations that are relevant for human health effects. Different approaches are proposed to derive effect‐based trigger values (EBTs), including EBTs based on (1) relative ecotoxicity potency, (2) health‐based threshold values for chronic exposure in humans and kinetics of reference chemicals, and (3) read‐across from (drinking) water guideline values. Effects‐based trigger values need to be chosen carefully in order to be sufficiently but not overly conservative to indicate potential health effects. Consensus on the crucial steps in the selection and interpretation of in vitro bioassay data will facilitate implementation and legal embedding in the context of water quality monitoring of such assays in EBM strategies. Integr Environ Assess Manag 2019;15:126–134. © 2018 The Authors. Integrated Environmental Assessment and Management published by Wiley Periodicals, Inc. on behalf of Society of Environmental Toxicology & Chemistry (SETAC), Key Points Effects‐based monitoring (EBM) can provide insight into the risks for environmental and human health associated with exposure to (unknown) complex low‐level mixtures of micropollutants.Bioanalytical tools can be evaluated for their applicability and performance for water quality monitoring on existing information and experimental evaluations.Effect‐based trigger values for interpretation of bioassay responses need to be chosen carefully in order to be sufficiently but not overly conservative.Consensus on the crucial steps in the selection and interpretation of in vitro bioassay data will facilitate implementation of bioanalytical tools as well as legal embedding in the context of water quality monitoring in EBM strategies.

River deltas sustain important ecosystems with rich biodiversity and large biomass, as well as human populations via the availability of water and food sources. Anthropogenic activities, such as urbanization, tourism and agriculture, may pose threats to river deltas. The knowledge of the factors controlling the regional water quality regime in these areas is important for planning sustainable use and management of the water resources. Here, hydrochemical methods and multivariate statistical techniques were combined to investigate the shallow aquifer of the Pinios River (Thessaly) deltaic plain with respect to water quality, hydrogeochemical evolution and interactions between groundwater and surface water bodies. Water quality assessment indicated that most of the river and groundwater samples fully comply with the criteria set by the Drinking Water Directive (98/83/EC). The river is recharged mainly from springs of the Tempi valley and the shallow aquifer, and to a lesser degree from precipitation, throughout the year. The hydrogeochemical characteristics indicated a cation (Ca, Mg, and Na) bicarbonate water type, which evolves to calcium-chloride, sodium-bicarbonate and sodium-chloride water type, in the northern part of the delta. Calcite and dolomite dissolution determined the major ion chemistry, but other processes, such as silicate weathering and cation exchange reactions, also contributed. In the northern part of the plain, the interaction with the deeper aquifer enriched the shallow aquifer with Na and Cl ions. Principal Component Analysis showed that five components (PCs) explain 77% of the total variance of water quality parameters; these are: (1) salinity; (2) water-silicate rocks interaction; (3) hardness due to calcite dissolution, and cation exchange processes; (4) nitrogen pollution; and (5) non-N-related artificial fertilizers. This study demonstrated that the variation of water hydrochemistry in the deltaic plain could be attributed to natural and anthropogenic processes. The interpretation of the PCA results dictated the parameters used for the development of a modified Water Quality Index (WQI), to provide a more comprehensive spatial representation of the water quality of the river delta.

Metaldehyde is a molluscicide and the active ingredient in formulated slug pellets used for the protection of crops. Due to its mobility in the environment it is frequently found in river catchments, often at concentrations exceeding the EU Drinking Water Directive limit of 100 ng L-1 for a single pesticide. This presents a major problem for water companies in the UK where such waters are abstracted for production of potable drinking water supplies. Therefore, it is important to understand the sources, transport and fate of this emerging pollutant of concern in the aquatic environment. We monitored metaldehyde in two contrasting river catchments (River Dee (8 sites) and River Thames (6 sites)) over a twelve month period that coincided with the agricultural application period of the molluscicide. Spot samples of water were collected typically weekly or fortnightly. Chemcatcher® passive samplers were deployed consecutively every two weeks. At the River Dee, there was little variability in the concentrations of metaldehyde (-1) measured in the spot samples of water. The Chemcatcher® gave similar time-weighted average concentrations which were higher following increased rain fall events. At the River Thames, concentrations of metaldehyde varied more widely (-1) with several samples exceeding 100 ng L-1. Generally these concentrations were reflected in the time-weighted average concentrations obtained using the Chemcatcher®. Both monitoring techniques gave complementary data for identifying input sources, and in the development of catchment management plans and environmental remediation strategies.

Three techniques were used to measure 222Rn in drinking water: the degassing method followed by counting in an ionisation chamber (IC); gamma spectrometry (GS); and liquid scintillation counting (LSC). Environmental samples were measured in the field using the IC, and the same samples were measured in the laboratory using GS and LSC. The results obtained using the three techniques are compared and discussed in the context of the new Euratom Drinking Water Directive (2013/51/Euratom), which sets out general principles for monitoring radioactive substances such as radon.

Quantification of several alpha and beta emitters in mixtures of radionuclides arouses great interest in many fields such as surveillance around nuclear power plants, radioecology, accidental situations or drinking water control. Radiochemical separations are commonly used to deal with this issue. However, deconvolution methods for the analysis of LS spectra have been developed to avoid time-consuming radiochemical separations. The deconvolution procedure usually consists of the comparison of the spectrum that has to be analysed with a set of standard spectra. In order to obtain reliable results, the library of spectra used in the deconvolutions must fit with the analysed sample. For this reason, in order to determine all radionuclides included in the drinking water directive it has been established a strategy to select the radionuclides whose LS spectra must be included in the Partial least squares (PLS) model.

The aim of this article is to assess the efficiency of the current international and EU regulatory framework concerning water quality, health promotion, and disease prevention. To this end, starting from the World Health Organization’s (WHO) guiding role in promoting universal, affordable, and sustainable access to water, sanitation, and hygiene (WASH), the paper critically analyses the regional legal instruments adopted to reduce the level of waterborne disease transmission and achieve the Sustainable Development Goals, including the 1999 WHO-United Nations Economic Commission for Europe (UNECE) Protocol on Water and Health, and the 2018 EU Commission proposal for modernizing the 20-year old Drinking Water Directive.

Very low or very high concentrations of calcium (Ca) and magnesium (Mg) or total hardness in drinking water have been empirically recognized as the cause of the problems with corrosion, scaling, or taste of water. A large body of scientific evidence over the last 60 years has also attributed health problems to both extremes of these minerals in water. For example, drinking water low in Mg significantly increases the likelihood of cardiovascular mortality. This knowledge is not properly considered in the drinking water quality regulations, especially as more and more water is now produced by desalination disturbing its natural mineral composition. Although the current EU Drinking Water Directive does not include limits for hardness, Ca or Mg, most member states regulate these parameters either through law (12 countries) or technical guidance (7 countries), and several countries have issued educational information for the public. However, the regulations in most countries are not based on current research and not comparable because some provide a recommended range while others provide mandatory minimum or maximum limit values. This summary of the situation in 28 European Union countries is intended to provide information that can contribute to the implementation of the revised EU Directive.

Metaldehyde is recognised as an emerging contaminant. It is a powerful molluscicide and is the active compound in many types of slug pellets used for the protection of crops. The application of pellets to land generally takes place between August and December when slugs thrive. Due to its high use and physico-chemical properties, metaldehyde can be present in the aquatic environment at concentrations above the EU Drinking Water Directive limit of 100 ng L−1 for a single pesticide. Such high concentrations are problematic when these waters are used in the production of drinking water. Being able to effectively monitor this pollutant of concern is important. We compared four different monitoring techniques (spot and automated bottle sampling, on-line gas chromatography/mass spectrometry (GC/MS) and passive sampling) to estimate the concentration of metaldehyde. Trials were undertaken in the Mimmshall Brook catchment (Hertfordshire, UK) and in a feed in a drinking water treatment plant for differing periods between 17th October and 31st December 2017. This period coincided with the agricultural application of metaldehyde. Overall, there was a good agreement between the concentrations measured by the four techniques, each providing complementary information. The highest resolution data was obtained using the on-line GC/MS. During the study, there was a large exceedance (500 ng L−1) of metaldehyde that entered the treatment plant; but this was not related to rainfall in the area. Each monitoring method had its own advantages and disadvantages for monitoring investigations, particularly in terms of cost and turn-a-round time of data. Electronic supplementary material The online version of this article (10.1007/s10661-019-7221-x) contains supplementary material, which is available to authorized users.

According to the recent proposal released by the European Commission for the revision of the 98/83/EC Directive, water suppliers will be requested to monitor the nine bromine- and chlorine congeners of haloacetic acids, HAAs, as well as the oxyhalides chlorite and chlorate, as disinfection by-products (DBPs) originated during the potabilization process. In this work, we propose a direct-injection method based on ion chromatography and mass spectrometric detection for the determination of the mentioned DBPs as well as bromate (already included in the 98/83/EC), implemented also for the following emerging HAAs monoiodo-, chloroiodo- and diiodo-acetic acids. The method was optimized to include the fifteen compounds in the same analytical run, tuning the chromatographic (column and gradient) and detection conditions (suppression current, transitions, RF lens settings and collision energies). To avoid matrix effect and to manage the instrumental conditions, optimization was performed directly in drinking water matrix. The method quantitation limits satisfy the new limits imposed by the future directive and range from 0.08 μg/L (monobromoacetic acid) to 0.34 μg/L (trichloroacetic acid). The performance of the method was checked along different strategic sampling points of three potabilization plants serving the city of Turin (Italy), including intermediate treatments and finished waters. Recovery was checked according to the ±30% limit of acceptability set by EPA regulations. The effect of disproportionate concentrations of chlorite and chlorate in respect to HAAs on HAA signals was studied; this aspect is underestimated in literature. The method is routinely applied by the potabilization plant of the city of Turin to confirm the effectiveness of all control measures in abstraction, treatment, distribution and storage. This study represents the first example in Italy of development and use of a cutting-edge technique for HAAs analysis along the potabilization processes.

The European Union published in 2013 a new Drinking Water Directive with stricter requirements for measuring natural radioactivity. In order to adhere to this, a method for sequential separation of 210Pb, 210Po, 238U and 234U in drinking water was applied using UTEVA® and Sr resins. Polonium-210, 238U and 234U were quantified using alpha-particle spectrometry and 210Pb using liquid scintillation counting. Radium-226 and 228Ra were determined using 3M Empore Radium RAD Disks, and their quantification was done using a Quantulus™ 1220 liquid scintillation counter.

Bisphenol A (BPA) is a chemical produced in large quantities for use primarily in the production of polycarbonate plastics and epoxy resins. As an endocrine-disrupting compound, it has been included in the list of substances requiring special supervision as a very high-risk substance due to its toxic influence on reproduction. BPA with a reference value of 0.01 μg/L was included in the Drinking Water Directive revision (DWD 2018). This paper presents the results of preliminary studies aimed at identifying the occurrence of BPA in different types of water, i.a. groundwater captured with house wells or flowing wells in a selected location in southern Po-land. These waters are commonly used as a source of water intended for human consumption and their quality is not regularly controlled. Additional tests were carried out for surface water, as well as water from springs used for drinking purposes. The authors also analysed tap water from various sources, i.e. surface and groundwater, as the final product of the drinking water production cycle. The results indicate the presence of BPA in water and the necessity of a detailed study on the risk of the BPA occurring in groundwater, especially in domestic wells.

Post-print (lokagerð höfundar), Drinking water quality has been regulated in most European countries for nearly two decades by the drinking water directive 98/83/EC. The directive is now under revision with the goal of meeting stricter demands for safe water for all citizens, as safe water has been recognized as a human right by the United Nations. An important change to the directive is the implementation of a risk-based approach in all regulated water supplies. The European Union Framework Seventh Programme Aquavalens project has developed several new detection technologies for pathogens and indicators and tested them in water supplies in seven European countries. One of the tasks of the project was to evaluate the impact of these new techniques on water safety and on water safety management. Data were collected on risk factors to water safety for five large supplies in Denmark, Germany, Spain and the UK, and for fifteen small water supplies in Scotland, Portugal and Serbia, via a questionnaire aiming to ascertain risk factors and the stage of implementation of Water Safety Plans, and via site-specific surveys known as Sanitary Site Inspection. Samples were collected from the water supplies from all stages of water production to delivery. Pathogens were detected in around 23% of the 470 samples tested. Fecal contamination was high in raw water and even in treated water at the small supplies. Old infrastructure was considered a challenge at all the water supplies. The results showed that some of the technique, if implemented as part of the water safety management, can detect rapidly the most common waterborne pathogens and fecal pollution indicators and therefore have a great early warning potential; can improve water safety for the consumer; can validate whether mitigation methods are working as intended; and can confirm the quality of the water at source and at the tap., This work was supported by the European Union Seventh Framework Programme under the AQUAVALENS project (Grant Agreement number 311846).

The objective of this study was to monitor the quality of ground water supplied to animal farms and 2 villages and of surface water (rivers) in the same area (Kosice basin, eastern Slovakia) with the aim to assess contamination of water by potential sources in this area. Samples for physico-chemical and microbiological examination were collected at 12 sampling points (6 – surface water; 6 – ground water) from May 2014 up to March 2015, covering all four seasons. The examination and evaluation of individual parameters was carried out according to relevant Slovak legislation compatible with EU Drinking water directive. The physico-chemical evaluation focused on parameters that indicate pollution of water resulting from human activities and farming. Microbiological examination included determination of counts of bacteria cultivated at 22°C and 37°C (BC22 and BC37), total coliforms, E. coli and faecal streptococci. Ground water intended for mass consumption (farms, villages) is abstracted from wells, collected in storage reservoirs and disinfected before brought to consumers. Some families in the villages use their own wells. Water for individual consumption (individual households) originates directly from individual wells. Examination of potable water used on agricultural farms showed some possibility of contamination of sources by runoff and inappropriate manipulation with excrements. Surface water in in the area close to both farms was polluted with organic substances (CODMn), however they did not exceed the limit set for surface water. At many samplings we detected in surface water presence of total coliforms, E. coli and occasionally also faecal enterococci indicating faecal pollution that could eventually affect ground water in individual wells. Our investigations showed that protection zones of water sources were not always sufficient. There were considerable variations in the quality of surface water during the year but no clear relationship between microbial contamination and seasons was observed. Quality of ground water supplied for mass consumption complied with legislative regulations except for BC 22 (heterotrophic count at 22°C) in summer and autumn). Water from individual wells contained occasionally presence of total coliforms, E.coli and enterococci and higher heterotrophic counts.

Polycyclic aromatic hydrocarbons (PAHs) are persistent organic pollutants renowned for their ubiquity in the environment and potential carcinogenicity. To verify compliance to the European Drinking Water Directive (98/83/EC) and Water Framework Directive (2000/60/EC), these compounds have to be monitored in environmental waters. Conventional laboratory analysis implies important costs and labour, and may lead to low sample representativeness due to sampling, transport and storage prior to analysis. To date, no portable equipment enables in situ PAH determination with adequate selectivity and sensitivity. To build a cost-effective and high-performance portable system, a microfluidic device for fast extraction of PAHs with low volume samples has been developed and tested by solvent desorption. Pre-concentration recoveries were evaluated by high-performance liquid chromatography associated with multi-wavelength fluorescence detection (HPLC-FLD). The operational parameters were optimised with 5 µg L−1 spiked ...