The most comprehensive tap water database available - find out exactly what's in your water, anywhere in the country, with a single click.

Data powered by:

Environmental Protection Agency
Centers for Disease Control and Prevention

Contaminant Levels

Monitor levels of regulated contaminants and unregulated "forever chemicals" (PFAS) and compare them to EPA safety standards.

View Contaminant Data

Fluoridation Status

Check if your local water system adds fluoride to prevent tooth decay and promote dental health.

View Fluoridation Data

Worst Tap Water

Discover which states have the highest percentage of population affected by serious EPA violations.

View Worst Water Rankings