One click to find out exactly what's in your water, anywhere in the United States. The most comprehensive tap water database available.
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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