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SDWIS Overview
Information about safe drinking water is stored in SDWIS, the EPA's Safe Drinking Water Information System. SDWIS tracks information on drinking water contamination levels as required by the 1974 Safe Drinking Water Act and its 1986 and 1996 amendments. The Safe Drinking Water Act (SDWA) and accompanying regulations establish Maximum Contaminant Levels (MCLs), treatment techniques, and monitoring and reporting requirements to ensure that water provided to customers is safe for human consumption. The Safe Drinking Water Information System (SDWIS) contains information about public water systems and their violations of EPA's drinking water regulations. Searching SDWIS will allow you to locate your drinking water supplier and view its violations and enforcement history for the last ten years.
SDWIS Links
- Overview
- Search
- Model
- Drinking Water Regulations
- SDWIS Search User Guide
- Contact Us
- Office of Ground Water and Drinking Water Home
System Data Searches
Envirofacts * Multisystem Search * BR Search * GHG Search * GHG Query Builder * ICIS Search * ICIS Air Pollution Search * RADNET Radiation Search * RadNet Query Builder * RCRAInfo Search * Query Builder (WIETS data) * NEI Search * NGGS Search * SDWIS Search * SEMS Search * UV Index Search
Toxic Release Inventory (TRI) * TRI Explorer * TRI Search * Form R Search * Form R & A Download * EZ Search * Customized Search * Pollution Prevention
Facility Registry Service (FRS) Query * FRS Query * FRS Query Builder * FRS Organization Query Form
Map of Cleanups in My Community ECHO SRS Search
Other Sites of Interest
Envirofacts
Open Sidenav Menu Close Sidenav Menu Contact Us About Envirofacts Contact Us About Envirofacts to ask a question, provide feedback, or report a problem. Last updated on April 14, 2026 Welcome! Please share your feedback on how we can make www.epa.gov work better for you. A red asterisk (*) indicates a required field.
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