Drinking Water Data and Tools
The EPA's Drinking Water Data website provides a clearinghouse for drinking water related data and data analysis tools. This one-stop website allows users to learn more about what data are available and use the data to increase their understanding of drinking water across the nation. Datasets cover drinking water quality, loan and grant information, unregulated contaminants, and more. Some of the datasets in this clearinghouse help fulfill the EPA's requirement under the Safe Drinking Water Act to assemble and maintain a National Contaminant Occurrence Database. Learn more about the National Contaminant Occurrence Database.
Use the tools on this page to dive into the most relevant drinking water datasets and data tools. Use the category drop down to filter by topic or sort by alphabetical order. Not sure where to begin? Check out the Drinking Water Data & Tools Guide.
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Safe Drinking Water Information System
SDWIS is the EPA’s system of record for Safe Drinking Water Act data; it includes data on public water system characteristics and compliance with SDWA regulations.
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State Revolving Fund Public Portal
Users can access data from both the drinking water and clean water SRF programs through interactive reports, dashboards, and maps.
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Fifth Unregulated Contaminant Monitoring Rule Data Finder
Users can easily search, summarize, and download the available analytical results from the fifth UCMR.
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Drinking Water Mapping Application to Protect Source Waters
Water professionals can find important information related to protecting drinking water sources with the DWMAPS tool.
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Community Water System Service Area Boundaries
Users can view the geographic areas supplied with drinking water by community water systems.
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Enforcement and Compliance History Online PFAS Analytic Tools
Analyze various PFAS data from a variety of sources in a region, state, or community with the ECHO PFAS Analytic Tools.
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Aircraft Drinking Water Rule Compliance Reports
Users can access ADWR data through reports; data which includes: aircraft inventory information, drinking water sample results, and violation information.
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Archival Data Finder for the Unregulated Contaminant Monitoring Rule
Users can easily search, summarize, and download analytical results from past cycles of the UCMR.
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Enforcement and Compliance History Online EPA/State Drinking Water Dashboard
Analyze summary trends for key regulatory activities from EPA and implementing states, tribes, and territories with the ECHO EPA/State Drinking Water Dashboard.
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Enforcement and Compliance History Online Facility Search
Analyze public water system compliance with drinking water regulations with the ECHO Facility Search.
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Environmental Resilience Tools Wizard
Water professionals will find a variety of tools that can help address disaster mitigation, preparedness, response, and recovery.
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EPA Data
Users interested in data for other topics like air, land, and chemicals can find additional EPA data resources and understand how EPA uses these data.
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Fifth Drinking Water Infrastructure Needs Survey and Assessment
Users can explore the fifth DWINSA results based on findings from 2011 through a comprehensive report. For the latest DWINSA results, see the seventh DWINSA.
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Government Performance and Results Act Tool
Users can find summary data of EPA’s drinking water program’s performance measures and results.
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How's My Waterway?
Users can find information about the condition of their local waters based on data submitted to the EPA and other relevant data sets.
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Infrastructure Investment and Jobs Act Construction Projects Viewer
Users can view government-wide construction projects funded with grants and cooperative agreements authorized by the Infrastructure Investment and Jobs Act (includes multiple project areas, not just water-related projects).
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National Contaminant Occurence Database
The NCOD houses the Six-Year Review of national drinking water regulations data, the unregulated contaminant occurrence data, and the ambient and/or source water data.
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Primacy Agency Drinking Water Data
Users can find a list of primacy agencies' publicly maintained drinking water databases, whose data may be more-up-to date and detailed than at EPA.
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Private Domestic Well Map (2020)
This interactive map allows users to view estimates for housing units using domestic wells for household water supply for 2020.
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Report on the Environment - Drinking Water
Users can view drinking water standards violation trends in community water systems through a series of interactive exhibits.
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Seventh Drinking Water Infrastructure Needs Survey and Assessment
Users can explore the latest DWINSA results from the seventh DWINSA data through easy-to-use visualizations based on findings from 2021.
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Sixth Drinking Water Infrastructure Needs Survey and Assessment
Users can explore the sixth DWINSA results data through easy-to-use visualizations based on findings from 2015. For the latest DWINSA results, see the seventh DWINSA.
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Sole Source Aquifer Map
Users can find drinking water sole source aquifer locations through an interactive map.
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Underground Injection Control Well Inventory
Users can find an inventory of injection control wells collected by the UIC program annually.
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Underground Storage Tank Finder
Users can find a comprehensive, national map of underground storage tank (UST) facilities and UST release data, including locations and attributes of active and closed UST facilities.
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Voluntary School and Child Care Lead Testing and Reduction Grant Program Dashboard
Users can learn more about the progress and accomplishments of the Voluntary School and Child Care Lead Testing and Reduction Grant Program.
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Water Contaminant Information Tool
Water professionals can find comprehensive information about contaminants to help them prepare for, respond to, or recover from drinking water contamination incidents.
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Water Infrastructure and Capacity Assessment Tool
Water ICAT is an interactive map that helps users identify drinking water and wastewater utilities that may benefit from water infrastructure technical or capacity development assistance.
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Water Infrastructure Finance and Innovation Act Fund Facts Dashboard
Users can explore the WIFIA program's portfolio of closed and pending loans.
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Water Infrastructure Resilience Tools
Water professionals will find a variety of tools that can help strengthen their water system infrastructure resiliency.
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Water Modeling Tools for Decision Support
Water professionals will find a variety of tools that can help support drinking water system emergency response, treatment technologies, and more.
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Water Utility Response On-The-Go Plus
Water professionals can use this mobile application to find information and tools that may be needed while responding to emergency incidents.
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Drinking Water Models, Tools, and Methods
Water professionals can visit this page to find a variety of models, tools, and analytical methods that support the provision of safe drinking water to communities.
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EPA Datasets
Users can find the EPA's public catalog of available datasets on data.gov which provides an alternate way to find and access EPA datasets. This site also hosts datasets from across all the federal government which helps with data transparency and access.
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Find Your Local Consumer Confidence Report
Users can search EPA's database to find their annual CCR that includes information on source water, the levels of detected contaminants, and compliance with drinking water rules.
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Investments from EPA Under the Bipartisan Infrastructure Law and the Inflation Reduction Act
Users can explore EPA investments (across all programs, not just drinking water) made in the health, equity, and resilience of American communities through the BIL and IRA investments map.
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Water Finance Clearinghouse
The Water Finance Clearinghouse includes two searchable databases including funding sources and resources on financing mechanisms to help communities access capital to meet their water infrastructure needs.
Drinking Water Data & Tools Guide
This page will help guide you to the most relevant drinking water datasets and data tools based on the question you are seeking to answer. The guide covers all the datasets and tools listed in EPA’s Drinking Water Data and Tools Gallery.