Source document
Central High School, IL 2005 Consumer Confidence Report
The original annual drinking-water report. Every number on the Central High School, IL water quality page is pulled from this document.
The Central High School, IL figures for 2005 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the Central High School, 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