Source document
Keystone Steel and Wire, IL 2019 Consumer Confidence Report
The original annual drinking-water report. Every number on the Keystone Steel and Wire, IL water quality page is pulled from this document.
The Keystone Steel and Wire, IL figures for 2019 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the Keystone Steel and Wire, 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