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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"Your site is excellent - it is truly one of the best renderings of water data our team has seen and I've been in this field for 14 years"
Jess G., PhD
Water Quality Expert
"This looks like a very cool application. To my knowledge, this is the only app of it's kind using EPA boundary data to find the correct water system for a given address."
Andrew M., PhD
EPA Geographer
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