Data collected during the Benton Harbor Drinking Water Study. The majority of the study data is contained in the BH_Data_V13 Excel file and background water quality data collected during the sequential sampling portion of the study is located in BH_Data_WaterQuality_V4 Excel file. This dataset is associated with the following publication: Tully, J., S. Shilling, V. Bosscher, M. Schock, and D. Lytle. Benton Harbor Drinking Water Study. U.S. Environmental Protection Agency, Washington, DC, USA, 2023.

Data collected during the Benton Harbor Drinking Water Study. The majority of the study data is contained in the BH_Data_V13 Excel file and background water quality data collected during the sequential sampling portion of the study is located in BH_Data_WaterQuality_V4 Excel file. This dataset is associated with the following publication: Tully, J., S. Shilling, V. Bosscher, M. Schock, and D. Lytle. Benton Harbor Drinking Water Study. U.S. Environmental Protection Agency, Washington, DC, USA, 2023.

EF_NPDES is a subset of facilities from FRS_PROGRAM_FACILITY and associated best-available geospatial coordinates which are refreshed daily. The layer shows only points from the NPDES (National Pollutant Discharge Elimination System) and PCS (Permit Compliance System) programs as reported in ICIS (Integrated Compliance Information System). The NPDES subset is updated weekly.

EF_NPDES is a subset of facilities from FRS_PROGRAM_FACILITY and associated best-available geospatial coordinates which are refreshed daily. The layer shows only points from the NPDES (National Pollutant Discharge Elimination System) and PCS (Permit Compliance System) programs as reported in ICIS (Integrated Compliance Information System). The NPDES subset is updated weekly.

Lead concentrations in drinking water samples collected under various sampling protocols in homes with lead service lines and in homes without lead service lines in two US cities. This dataset is associated with the following publication: Lytle, D., M. Urbanic, A. Paul, R. Achtemeier, A. Lewis, S. Hammaker, A. Estep, M. Nadagouda, R. James, and S. Triantafyllidou. Alternative approaches to lead sampling in drinking water: A comparative study of homes with and without lead service lines in two cities. WATER RESEARCH. Elsevier Science Ltd, New York, NY, USA, 994: 180063, (2025).

The Division of Drinking Water (DDW), in collaboration with the California Department of Education, has taken the initiative to begin testing for lead in drinking water at all public K-12 schools. In early 2017, DDW and Local Primacy Agencies issued amendments to the domestic water supply permits of approximately 1,200 community water systems so that schools that are served by a public water system could request assistance from their public water system to conduct water sampling for lead and receive technical assistance if an elevated lead sample is found. To further safeguard water quality in California’s K-12 public schools, California Assembly Bill 746 published on October 12, 2017, effective January 1, 2018, requires community water system to test lead levels, by July 1, 2019, in drinking water at all California public, K-12 school sites that were constructed before January 1, 2010. The **[program webpage](https://www.waterboards.ca.gov/drinking_water/certlic/drinkingwater/leadsamplinginschools.html)** contains information on both the permit amendments and AB 746.

Files are an overview of all data acquired in the study examining source and treated drinking water. This dataset is associated with the following publication: Glassmeyer , S., E. Furlong, D. Kolpin, A. Batt , B. Benson , S. Boone , O. Conerly , M. Donohue , D. King , M. Kostich , H. Mash , S. Pfaller , K. Schenck , J.E. Simmons , E. Varughese , S. Vesper , E. Villegas , and V. Wilson. Nationwide reconnaissance of contaminants of emerging concern in source and treated drinking waters of the United States. SCIENCE OF THE TOTAL ENVIRONMENT. Elsevier BV, AMSTERDAM, NETHERLANDS, 581582: 909-922, (2017).

Files are an overview of all data acquired in the study examining source and treated drinking water. This dataset is associated with the following publication: Glassmeyer , S., E. Furlong, D. Kolpin, A. Batt , B. Benson , S. Boone , O. Conerly , M. Donohue , D. King , M. Kostich , H. Mash , S. Pfaller , K. Schenck , J.E. Simmons , E. Varughese , S. Vesper , E. Villegas , and V. Wilson. Nationwide reconnaissance of contaminants of emerging concern in source and treated drinking waters of the United States. SCIENCE OF THE TOTAL ENVIRONMENT. Elsevier BV, AMSTERDAM, NETHERLANDS, 581582: 909-922, (2017).