About Tap Water Results

Tap Water Results turns the U.S. EPA's drinking water data into one plain page per water system, city and contaminant: what was found, how it compares to the legal limit and health guidelines, and the system's violation record. The data is public, but it's spread across large files most people never see. We publish it as reported and explain the caveats on every page.

Who we are

Tap Water Results is a small, independent publication. We build the data pipeline, check it against EPA's own published figures, and write the explanations on this site. We don't publish staff names. Instead, every number links back to the EPA record it came from, so you can check it without taking our word for it.

We are not affiliated with EPA, any water utility, any state agency or any filter maker, and nobody pays to be listed or ranked. Our editorial standards · How we read the data.

Contact

Questions, corrections and press: support@tapwaterresults.com. More on the contact page.

How often the data is updated

EPA publishes its Safe Drinking Water Information System download quarterly, and we rebuild every page when it does. The current data is EPA's 2026Q3 release (Oct 13, 2026) and the final UCMR 5 PFAS file (Oct 15, 2026). The method page lists the sources.

Corrections

If a page is wrong, tell us and we'll check it against EPA's records. Our corrections policy explains what we fix, what has to be fixed at EPA, and lists every correction.

Funding & disclosure

The site currently carries no advertising and no affiliate links, and earns nothing from any product, utility or agency. If that changes, this section will say so before any such link appears.

Not medical advice

This site reports regulatory and monitoring data. It is not medical advice. Talk to your doctor about health concerns, and check your utility's Consumer Confidence Report and your state drinking water program for official compliance information.