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We conducted a study within the framework of the interdisciplinary European Mercury Emission from Chloralkali Plants (EMECAP) project to assess exposure to mercury (Hg) and the contribution of Hg emissions from a mercury cell chloralkali plant to urinary mercury (U-Hg) in adults living near the plant. We collected data from questionnaires and first morning urine samples from 75 subjects living near the Tarnow plant in Poland and 100 subjects living in a reference area. Median U-Hg was 0.32 mug/g creatinine (microg/gC) and 0.20 microg/gC, respectively. The median U-Hg was also higher in the amalgam-free subjects living near the plant (0.26 microg/gC) than in the reference group (0.18 microg/gC), but no such association was found in a multivariate analysis. There was a statistically significant positive association between U-Hg and number of teeth with amalgams, a negative association with age and a tendency towards higher U-Hg in female subjects. In the amalgam-free subjects there were statistically significant effects of female sex and fish consumption, and a negative association with age. The additional long-term average air Hg concentration from the plant, based on EMECAP environmental measurements and modelling, was estimated to be 1-3.5 ng/m(3) for the residential study area and should have a very small effect on U-Hg. The other Hg emission sources such as coal combustion facilities located nearby should be taken into account in assessing the overall impact of air Hg on U-Hg in this area.

We performed environmental burden of disease (EBD) assessment of the neurotoxic effects of lead in the Polish urban children, in accordance with the WHO guidelines. The EBD assessment was based on the data on blood lead levels (BLL) of more than 8500 children from the lead biomonitoring programme conducted in the urban centre of the Upper Silesia Province, Poland between 1993 and 2000. In order to make the EBD assessment region specific, in the projections to years 2001 and 2005 we used 4% annual decrease in BLL, derived from the earlier analysis of the Silesian BLL data instead of the WHO proposed 7.8%. Mean BLL in the Silesian children projected for the year 2001 was higher (4.9 microg/dL) than the corresponding value for the WHO EurB region (3.9 microg/dL). The incidence rate of mild mental retardation (MMR) in the Silesian children was twice as high as in the EurB region for the year 2001, meaning more than two additional cases of MMR due to lead exposure per 1000 children aged 0-1 year, compared with 1 in 1000 children in the EurB region.