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Introduction: Lead poisoning contributes to a significant burden of disease as a toxic substance found in air, soil, and water. In Indonesia, the risk of exposure is high due to the inappropriate recycling of used lead batteries. The objective was to investigate the factors that influence lead levels in children's blood., Methods: This cross-sectional study assessed blood lead levels (BLLs) in children aged 12-59 months in four communities exposed to used lead-acid batteries (ULABs) recycling activities, comparing them to a control area. The study employed a threshold level of 20 μg/dL to identify high BLLs and utilized a sample size of 324 children from exposed sites and 240 from control sites. Questionnaires, blood lead tests and a home-based assessment for environmental exposures were applied., Results: The study participants comprised 295 boys and 269 girls, with an average age of 35 months. Significant disparities in soil lead concentrations median: Q1-Q3 were found between exposed (6581.7 : 2432.6-16647.1) ppm and control areas (253.5 : 158.8-417.1) ppm. Children in exposed areas had 3.9 times higher odds of BLL ≥20 μg/dL. Fathers with BLL ≥20 μg/dL had children with similarly elevated BLLs. Multivariate analysis identified socioeconomic status, study areas, environmental factors (cookware, food ware, spices, house cleaning), and children's behavior (breastfeeding duration) as determinants of elevated BLLs. Reported environmental factors had notable impact on BLLs, with aluminum cookware (aOR = 1.4, 95%CI [1.2-1.6]), food ware materials (aOR = 1.15, 95%CI [1.0-1.3]), type of spices (aOR = 2.7, 95%CI [1.7-48.0]), and house cleaning method (aOR = 2.9, 95%CI [1.2-7.1])., Conclusion: This study highlighted key risk factors affecting children's blood lead levels (BLL) and emphasized the urgency of employing effective strategies to remediate lead-contaminated soils in exposed regions. The findings underscore the need for prompt medical intervention and monitoring for children in these areas, with additional research essential to fully understand lead poisoning pathways in the environment., Competing Interests: Declaration of competing interest The authors declare no conflict of interest. The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 The Authors. Published by Elsevier GmbH.. All rights reserved.)

While lead-based paint has been banned for use in residential settings in most high-income countries, it remains commonly available in many low- and middle-income countries (LMICs). Despite its continued availability, little is known about the specific exposure risk posed by lead-based paint in LMICs. To address this knowledge gap, an assessment of home and preschool dust and paint was carried out in Greater Jakarta, Indonesia. A team of investigators used field portable X-ray Fluorescence (pXRF) to measure 1574 painted surfaces for the presence of lead (mg/cm 2 ) and collected 222 surface dust wipe samples for lead loading (μg/m 2 ) from 103 homes and 19 preschools across 13 different neighborhoods of Jakarta. The assessment found that 2.7% (n = 42) of pXRF measurements and 0.05% (n = 1) of dust wipe samples exceeded the commonly applied USEPA guideline values for paint (1 mg/cm 2 ) and dust (floors: 431 μg/m 2 ; window sills: 2691 μg/m 2 ). Thus, contrary to expectations the locations analyzed in Greater Jakarta showed that exposure risk to lead-based paint appears low. Further study is required in other settings to confirm the findings here. Precautionary measures, such as the proposed ban on lead-based paint, should be taken to prevent the significant social and economic costs associated with lead exposure., (Copyright © 2018. Published by Elsevier B.V.)