Our information sources

When was this information updated?

We check public sources at different times. The dates below help you see how recent the information is. For current local notices, contact your water provider.

What is available on this site?

Measurement coverage

Coverage counts describe results available here, not complete testing or water safety. Results include historical annual averages, utility report tables, and individual EPA monitoring samples. Read each source and sampling period separately.

Providers with results: 485 of 488
City pages with results: 260 of 260
ZIP pages with results: 289 of 289

18,623 source-linked records. A retrieval date does not mean a new sample was collected.

U.S. EPA SDWIS lead and copper monitoring records483 providers · 707 recordsReported periods: July 1, 1993 through June 30, 2026Retrieved or reviewed November 6, 2026Open source ↗
U.S. EPA UCMR 5 occurrence data126 providers · 14,090 records · Sample years 2023–2026Retrieved or reviewed November 6, 2026Open source ↗
Reviewed utility report tables2 providers · 136 records · Sample years 2024–2025Retrieved or reviewed November 6, 2026
Utah IBIS annual monitoring means464 providers · 3,595 records · Sample years 2000–2023Retrieved or reviewed November 6, 2026Open source ↗