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.

This dataset represents all of the data collected by EPA during the Benton Harbor Drinking Water Study, which was published as an EPA report: 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. For the journal article: An evaluation of properly operated NSF/ANSI-53 Pb certified drinking water filters in Benton Harbor, MI, published in 2024 (https://doi.org/10.2166/wh.2024.231). A subset of the filter study data, background water quality data, and particulate sample data was evaluated. This dataset is associated with the following publication: Tully, J., M. Schock, S. Shilling, V. Bosscher, D. Lytle, S. Harmon, and C. Bennett-Stamper. An evaluation of properly operated NSF/ANSI-53 Pb certified drinking water filters in Benton Harbor, MI. JOURNAL OF WATER AND HEALTH. IWA Publishing, London, UK, 22(2): 296-308, (2024).

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).

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.

Lead in Drinking Water in Schools Test Results – Lake Louise Follow up

This data provides results from chemistry and field analyses, from the California Environmental Data Exchange Network (CEDEN). The data set contains two provisionally assigned values (“DataQuality” and “DataQualityIndicator”) to help users interpret the data quality metadata provided with the associated result. Due to file size limitations, the data has been split into individual resources by year. The entire dataset can also be downloaded in bulk using the zip files on this page (in csv format or parquet format), and developers can also use the API associated with each year's dataset to access the data. Example R code using the API to access data across all years can be found [here](https://gist.github.com/daltare/2de1517ad1e315c4b1cad01278de96dd). Users who want to manually download more specific subsets of the data can also use the CEDEN query tool, at: https://ceden.waterboards.ca.gov/AdvancedQueryTool

Lead in Drinking Water in Schools Test Results – Cascade View Update

This work discusses drinking water sampling efforts for lead in Flint, MI. This dataset is associated with the following publication: Lytle, D., M. Schock, K. Wait, K. Cahalan, V. Bosscher, A. Porter, and M. Deltoral. SEQUENTIAL DRINKING WATER SAMPLING AS A TOOL FOR EVALUATING LEAD IN FLINT, MICHIGAN. WATER RESEARCH. Elsevier Science Ltd, New York, NY, USA, 157: 40-54, (2019).

Qualifiers, notes, and additional information regarding the sample data provided or omitted.