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Map My Drinking Water

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  • GIS Experience Needed
Drinking Water

DWMAPS: Drinking Water Mapping Application to Protect Source Water

Do you have a Superfund site near your drinking water source? A wastewater treatment plant? Use this tool to locate potential sources of contamination to your drinking water and gather data to develop a plan to protect your drinking water source. Tool is intended for public use and does not contain sensitive information

Forests to Faucets

Identifies forests that impact drinking water supplies, and shows which forests face the highest threat from development.

Water Quality

How’s My Waterway

See if your local waterway was checked for pollution, what was found, and what is being done. Learn the condition of local streams, lakes and other waters used for recreation, swimming, fishing, and sources of drinking water anywhere in the United States.

NPDAT: Nitrogen and Phosphorus Data Access Tool

One-stop shop for data on nitrogen and phosphorus in waters across the US. Compiles data from USGS modeling, in-stream monitoring data, the EPA National Aquatic Resource Survey, and more. For instructions, metadata, and training, visit:


Map USGS models to estimate the origin, fate, and transport of nitrogen and phosphorus in river networks across the US.


A comprehensive atlas of environmental data. Access, view, and analyze diverse information to better understand how various decisions affect an array of ecological and human health outcomes. Includes tools for measuring ecosystem services, elevation data, and runoff from rainfall.

Global Forest Watch

Forested lands can serve as natural filters for polluted runoff and directly protect sources of drinking water. Global Forest Watch tracks forest gain and loss around the world, based on multiple sources including crowd sources.

Water Quantity


A global water risk mapping tool that helps companies, investors, governments, and other users understand where water risks and opportunities are emerging.

Potential Sources of Contamination

ECHO: Enforcement and Compliance History Online

Information and maps of facilities regulated by EPA, including history of inspections, enforcement, and violations.

PIMMA: Pipeline Information Management Mapping Application

Maps of the locations of hazardous material pipelines across the US. PIMMA is exclusively available to pipeline operators and federal, state, and local government officials granted access by Pipeline and Hazardous Materials Safety Administration (PHMSA).

NPMS: National Pipeline Mapping System Public Map

View maps of gas transmission pipelines and hazardous liquid trunklines across the US. Maps are lower resolution than those available from PIMMA, but are publically accessible at the 1:24,000 maximum scale. NPMS does not contain gathering or distribution pipelines, such as lines which deliver gas to a customer’s home.

Inland Sensitivity Atlas

The Oil Pollution Act of 1990 (OPA) improved the nation’s ability to prevent and respond to oil spills. In response, EPA’s Region 5 Office for Minnesota, Wisconsin, Michigan, Illinois, Indiana, and Ohio created an Atlas of information relevant to oil spills in those states.

CAMEO: Computer-Aided Management of Emergency Operations

A system of software applications used to plan for and respond to chemical emergencies. Maps of chemical storage (primarily volatile chemicals) data in communities. Requires a desktop connection and GIS experience to operate.

People and Communities


Tracks environmental burden on disadvantaged communities, reported by census tract. EJSCREEN is based on metrics combining demographic data (age, income level, ethnicity, etc.) with environmental indicators.

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