Source document
Collinsville, IL 2004 Consumer Confidence Report
The original annual drinking-water report. Every number on the Collinsville, IL water quality page is pulled from this document.
The Collinsville, IL figures for 2004 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the Collinsville, 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