Source document
Hickory Hills 2nd Addition, IL 1994 Consumer Confidence Report
The original annual drinking-water report. Every number on the Hickory Hills 2nd Addition, IL water quality page is pulled from this document.
The Hickory Hills 2nd Addition, IL figures for 1994 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the Hickory Hills 2nd Addition, 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