Source document
Round Lake Beach, IL 2011 Consumer Confidence Report
The original annual drinking-water report. Every number on the Round Lake Beach, IL water quality page is pulled from this document.
The Round Lake Beach, IL figures for 2011 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the Round Lake Beach, 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