Public Water Utilities
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Use this tool to view and compare public water systems across the country.
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Search or zoom into the map to see information about public drinking water systems in areas of interest. Use the filters to customize the display.
Public Water Utilities
27 datasets available
Showing of 27 datasets available
This inventory of drinking water datasets includes information from various public data providers. Here, you can learn details about specific sources and considerations for use. Please visit the documentation for additional information.
EPIC wants to know what other datasets should be included in the tool.
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reset orderThis dataset contains geographic service area boundaries for U.S. Community Water Systems in the U.S. and select territories (Puerto Rico, Guam, Northern Mariana Islands). As of October 2025, over half of the approximately 50,000 water system boundaries come from authoritative data sources.
Data source: U.S. Environmental Protection Agency (EPA)
Last updated: 1/27/2026
Update frequency: Annually
Things you should know
Water system violation, enforcement, and system information submitted by states and utilities.
Data source: U.S. Environmental Protection Agency (EPA)
Last updated: 2/20/2026
Update frequency: Quarterly
Things you should know
The dataset combines 2021 American Community Survey (ACS) demographic and socioeconomic estimates with EPA drinking water system service area boundaries. EPIC allocated ACS census variables to system service areas using spatial crosswalk methods based on EPA boundary files. The result is a set of estimated community characteristics for each drinking water system, not direct measurements of the populations served.
Things you should know
This dataset includes permitted discharge outfalls from the EPA National Pollutant Discharge Elimination System (NPDES). NPDES documents point-source pollutant discharges to surface waters under the Clean Water Act. EPIC links permitted discharge locations to nearby drinking water systems to identify potential upstream pollution pressures. The dataset reflects regulated discharge activity, not measured drinking water contamination or human exposure.
Data source: U.S. Environmental Protection Agency (EPA)
Last updated: 2/3/2026
Update frequency: Quarterly
Things you should know
This dataset contains impaired surface waters reported by states to EPA under Clean Water Act Sections 303(d) and 305(b) through the Integrated Report. States identify assessment units that do not meet one or more designated water quality uses and require corrective action. EPIC links impaired waters to nearby drinking water systems as a potential indicator of source water characteristics, not treated drinking water quality.
Data source: U.S. Environmental Protection Agency (EPA)
Last updated: 2/3/2026
Update frequency: Quarterly
Things you should know
Publicly available drinking water advisories for water systems located in Oregon. Provided by the Oregon Public Health Authority.
Things you should know
Built for Biden’s Justice40 initiative, the CEJST uses datasets that are indicators of burdens in eight categories: climate change, energy, health, housing, legacy pollution, transportation, water and wastewater, and workforce development.
Things you should know
The U.S. Climate Vulnerability Index helps you see which communities face the greatest challenges from the impacts of a changing climate.
Things you should know
This SVI tool is a place-based index, database, and mapping application designed to identify and quantify communities experiencing social vulnerability. It uses 16 U.S. Census variables from the 5-year American Community Survey (ACS) to identify communities that may need support before, during, or after disasters.
Things you should know
These data represent funding awards for drinking water investment and improvement from the Drinking Water State Revolving Fund. Disseminated by states, awards are given largely in the form of loans to communities based on federal allotments and state-based programs.
Data source: U.S. Environmental Protection Agency (EPA)
Last updated: 2/20/2026
Update frequency: Annually
Things you should know
These data show the relationship between a water system, and its source watershed. While data on specific intake locations is private given security concerns, this match between a water system and a watershed is shared by the EPA.
Data source: U.S. Environmental Protection Agency (EPA)
Last updated: 10/7/2024
Update frequency: Static
Things you should know
These data contains location and facility identification information from EPA's Facility Registry Service (FRS) for the subset of facilities that link to the Risk Management Plan (RMP) System. The Risk Management Plan (RMP) database stores the risk management plans reported by companies that handle, manufacture, use, or store certain flammable or toxic substances.
Data source: U.S. Environmental Protection Agency (EPA)
Last updated: 2/3/2026
Update frequency: Quarterly
Things you should know
This data provides the attributes and locations of active and closed Underground Storage Tanks (USTs), UST facilities, and UST releases in states as of 2018-2019, US territories as of 2020-2021, and Tribal lands as of 2025.
Data source: U.S. Environmental Protection Agency (EPA)
Last updated: 2/3/2026
Update frequency: Static
Things you should know
This dataset contains the 10-year percent change (2011 ACS vs 2021 ACS) in ~70 different census variables for EPA's Service Area Boundaries. EPIC used the EPA ORD crosswalk and NHGIS crosswalk files to estimate counts for 2011 data, and household-weighted interpolation for income variables.
Things you should know
Publicly available drinking water advisories for water systems located in West Virginia. Provided by the West Virginia Department of Health and Human Resources.
Data source: WV Department of Health and Human Services
Last updated: 2/3/2026
Update frequency: Quarterly
Things you should know
Publicly available drinking water advisories for water systems located in New Mexico. Provided by the New Mexico Environment Department.
Things you should know
Publicly available drinking water advisories for water systems located in Ohio. Previously provided by the Ohio Environmental Protection Agency.
Things you should know
Publicly available drinking water advisories for water systems located in Rhode Island. Provided by the Rhode Island Department of Health.
Things you should know
Publicly available drinking water advisories for water systems located in Washington. Provided by the Washington Department of Health.
Things you should know
Publicly available advisories for systems with long-term contaminant issues in Missouri. Provided by the State of Missouri Data Portal.
Things you should know
Publicly available drinking water advisories for water systems located in Maine. Provided by the Maine Department of Health and Human Services.
Data source: Maine Department of Health and Human Services
Last updated: 2/4/2026
Update frequency: Quarterly
Things you should know
Publicly available drinking water advisories for water systems located in Alaska. Provided by Alaska's Department of Environmental Conservation.
Data source: AK Department of Environmental Conservation
Last updated: 2/4/2026
Update frequency: Quarterly
Things you should know
Publicly available drinking water advisories for water systems located in Arkansas. Provided by the Arkansas Department of Health.
Things you should know
Publicly available drinking water advisories for water systems located in Florida during extreme weather events. Provided by Florida Health.
Things you should know
Publicly available drinking water advisories for water systems located in Massachusetts. Provided by Massachusetts Department of Environmental Protection.
Data source: Massachusetts Department of Environmental Protection
Last updated: 10/30/2025
Update frequency: Quarterly
Things you should know
Publicly available drinking water advisories for water systems located in Louisiana. Provided by Louisiana Department of Health. Last update was July 9th 2025.
Things you should know
FOIA’d drinking water advisories for water systems located in Texas. Provided by the Texas Commission on Environmental Quality.
Data source: Texas Commission on Environmental Quality (TCEQ)
Last updated: 4/17/2024
Update frequency: Static
Things you should know
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Below, you'll find geospatial and tabular data for states, territories, and the nation as a zipped package.
Have questions about the data? Fill out our feedback form or get in touch via email watertool@policyinnovation.org.
(cc) Environmental Policy Innovation Center (EPIC)
How to use this tool:
Search or zoom into the map to see information about public drinking water systems in areas of interest. Use the filters to customize the display.
(cc) Environmental Policy
Center (EPIC)