Is Your Tap Water Safe to Drink?
Free water quality reports for every city in America. See what's really in your tap water based on EPA data.
Explore Water Quality Data
Best Water Quality
Top 50 cities with the cleanest, safest drinking water in America
Worst Water Quality
Cities with the most concerning water quality issues
Browse by State
Complete state rankings and water quality overview
Water Contaminants
Common contaminants, health effects, and which cities have them
Water Quality Alerts
Contamination warnings: lead, PFAS, arsenic, and bacteria by city
Water Quality Reports
Consumer Confidence Reports and CCR archive by state and city
By Water Source
Compare cities by water source: surface water vs groundwater
Compare Cities
Side-by-side water quality comparison tool
Water Calculators
Calculate water costs, filter savings, and daily hydration needs
Browse Water Quality by State
View complete state rankings →
How We Rate Water Quality
1. Collect EPA Data
We pull water quality data directly from EPA's SDWIS database, which tracks every public water system in America.
2. Analyze Contaminants
We compare detected contaminant levels against EPA maximum limits and health guidelines to assess risk.
3. Generate Score
Our algorithm calculates an overall score (0-100) based on contaminant levels, compliance history, and system infrastructure.
Concerned About Your Water Quality?
A home water filter can remove most contaminants and give you peace of mind. See our recommended filters.
View Water Filter Recommendations