About this site

Tap by Utility turns public U.S. EPA drinking-water files into plain-English pages, one per water utility, and explains which home filters fit which contaminants.

Sources

• U.S. EPA ECHO SDWA bulk download (SDWIS-derived), snapshot 2026-10-13.
• U.S. EPA Unregulated Contaminant Monitoring Rule 5 (UCMR 5) final dataset, October 2026 release.
• Filter guidance from NSF, ANSI, EPA and state health departments, cited on each page.

What this site is not

It is not a laboratory, a regulator or a health provider. It does not sell leads or collect your address. See the editorial policy and the affiliate disclosure.

Corrections

Found a number that looks wrong, or a page that is out of date? Write to [email protected] with the page address and what you saw. Corrections are logged on the editorial policy page.