Source document
Downs, IL 1999 Consumer Confidence Report
The original annual drinking-water report. Every number on the Downs, IL water quality page is pulled from this document.
The Downs, IL figures for 1999 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the Downs, 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