Source document
Heatherfield Subdivision, IL 2012 Consumer Confidence Report
The original annual drinking-water report. Every number on the Heatherfield Subdivision, IL water quality page is pulled from this document.
The Heatherfield Subdivision, IL figures for 2012 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the Heatherfield Subdivision, 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