Is Your Tap Water Safe to Drink?
Free, science-based water quality reports for every US city. See contaminant levels, EPA violations, and safety scores.
Data from the EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
How We Score Your Water
EPA Data
We pull contaminant test results and violation records directly from the EPA's SDWIS database.
Score & Grade
Each city gets a 0–100 score based on contaminant levels vs. EPA limits and violation history.
Plain English
We translate complex EPA data into clear answers about your water's safety.
2026 State Water Quality Rankings
Population-weighted scores based on EPA data