Tap WaterIndex

Is your tap water safe to drink?

Search lead, PFAS and other contaminants for any US city, ZIP code or water supplier — straight from official EPA monitoring.

Popular: New York City Los Angeles Phoenix San Diego Denver Miami

Every US public water system · All 50 states · Official EPA data · Free

Start here

A few examples of what a report looks like.

🏙️

New York City

8.4M people served — see lead, PFAS and more.
🏘️

Collegeville-Trappe, PA

A single supplier, same detailed report.
📊

Ranking by state

Compare lead and PFAS across all 50 states.
🧪

Contaminant guide

What each substance is, its EPA limit, and how common it is.

Water quality by state

Pick a state to see its water suppliers, ranked.

AlabamaAlaskaArizonaArkansasCaliforniaColoradoConnecticutDelawareFloridaGeorgiaHawaiiIdahoIllinoisIndianaIowaKansasKentuckyLouisianaMaineMarylandMassachusettsMichiganMinnesotaMississippiMissouriMontanaNebraskaNevadaNew HampshireNew JerseyNew MexicoNew YorkNorth CarolinaNorth DakotaOhioOklahomaOregonPennsylvaniaRhode IslandSouth CarolinaSouth DakotaTennesseeTexasUtahVermontVirginiaWashingtonWest VirginiaWisconsinWyoming

Lead & PFAS by state

The two contaminants people search for most.

Lead in CaliforniaLead in TexasLead in FloridaLead in New YorkLead in PennsylvaniaLead in IllinoisLead in OhioLead in Georgia PFAS in CaliforniaPFAS in TexasPFAS in FloridaPFAS in New YorkPFAS in PennsylvaniaPFAS in IllinoisPFAS in OhioPFAS in Georgia

Where the numbers come from

Every figure on the site is official EPA monitoring, labelled with its source and period — not our own testing.

🧪

Latest nationwide tests

PFAS and lithium, 2023–2025. The EPA's freshest data (UCMR-5).

🔩

Lead & copper

Utility compliance samples for lead and copper (Lead & Copper Rule).

📋

Everything else

Regulated contaminants, 2012–2019 (EPA Six-Year Review).