Source document
Windsor, IL 2009 Consumer Confidence Report
The original annual drinking-water report. Every number on the Windsor, IL water quality page is pulled from this document.
The Windsor, IL figures for 2009 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the Windsor, 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