Check Your Water Quality
Search by ZIP code to view EPA violation data, contaminant levels, and personalized filter recommendations for your area.
35,162
ZIP Codes Covered
506,253
Violations (5-Year)
413,894
Water Systems
50
States + DC
How It Works
Enter Your ZIP Code
Type in your 5-digit ZIP code to look up the public water systems serving your area.
See Violations
Review EPA-reported violations including contaminant types, measured levels, and resolution status.
Get Recommendations
Receive personalized water filter recommendations based on the specific contaminants found in your area.
Why Water Quality Matters
Every year, the EPA tracks violations of the Safe Drinking Water Act across tens of thousands of public water systems. Many communities face ongoing issues with contaminants like lead, disinfection byproducts, and bacteria. WaterCheck makes this data accessible so you can make informed decisions about the water you and your family drink every day.