Source document

Thomson, IL 2021 Consumer Confidence Report

The original annual drinking-water report. Every number on the Thomson, IL water quality page is pulled from this document.

The Thomson, IL figures for 2021 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the Thomson, IL water quality page is transcribed from that public dataset, and you can verify it against the same source below.

View the source dataset ↗

https://echo.epa.gov/tools/data-downloads/sdwa-download-summary