Source document

Central High School, IL 2021 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 2021 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