Is Your Drinking Water Safe?

Search EPA violation records for over 150,000 public water systems. Enter your location to check if your utility meets federal health standards.

Data from the EPA Safe Drinking Water Information System (SDWIS)

142,589
Active Water Systems
3,228,383
Violations Tracked
314,259
Health-Based Violations

How Can We Help?

Look up water quality data for any location in the United States

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Check Your Tap Water

Look up your water system's violation history, lead test results, and current compliance status.

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Moving to a New Home

Research water quality before you move. Check any address or zip code for violation history.

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Research Your Area

Compare water systems, view state report cards, and explore contaminant data across the country.

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Explore the Data

Worst ViolationsThe 100 systems with the most health-based violations on record Active Health ViolationsSystems with currently unresolved health-based violations Contaminant GuidesLead, arsenic, nitrate, and other drinking water contaminants State Report CardsEvery state graded A through F on drinking water safety

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Browse by State

Select a state to view water systems and violations

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Why Water Safety Matters

This site uses data from the EPA's Safe Drinking Water Information System (SDWIS), which tracks violations reported by all 50 states, territories, and tribes. The data covers public water systems serving everything from small communities to major cities.

What is a health-based violation?

A health-based violation means a water system exceeded an EPA maximum contaminant level (MCL) or failed to treat water to required standards. These violations indicate potential health risks from contaminants like lead, arsenic, bacteria, nitrates, or disinfection byproducts.

What should I do if my water system has violations?

If your water system has active health-based violations, consider using a certified water filter appropriate for the specific contaminants found. Contact your water utility for their latest Consumer Confidence Report, and check whether violations have been resolved.