Source document
Northfield Block Company 3, IL 2017 Consumer Confidence Report
The original annual drinking-water report. Every number on the Northfield Block Company 3, IL water quality page is pulled from this document.
The Northfield Block Company 3, IL figures for 2017 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the Northfield Block Company 3, 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