Why this exists

Searching "is my tap water safe" mostly turns up either a bottled-water ad or a vague regional news story. DrinkingWaterCheck instead reports what your own water utility told its regulator: its violation history, what kind of problem each one was, and whether it's still open.

What goes into each page

Every figure traces to EPA's Safe Drinking Water Information System (SDWIS) via the public ECHO bulk download - population served, service connections, violation counts and dates, and the contaminants or treatment-technique rules flagged. Nothing is estimated or inferred beyond what's in the source files.

What it cannot tell you

EPA's system-level record cannot see your own household plumbing, and it cannot substitute for a lab test of your specific tap. See the what this data misses guide for the full list of gaps.

Who runs this

DrinkingWaterCheck is an independently run site. It is not affiliated with EPA, any state primacy agency, or any water utility. Where a page includes a sponsored or affiliate link, that is disclosed on the page itself and in the privacy policy.

Written by

Every system page on DrinkingWaterCheck is generated directly from EPA's SDWIS bulk data, not paraphrased from another water-quality site. Each page's violation counts, dates, and contaminant categories are computed from the same source file (see how contaminants are grouped into concern categories), and pages are written by AI tools working from that data, not a named human author. Corrections reported through the contact page are checked against EPA's source data directly.