Source document
Polo, IL 2013 Consumer Confidence Report
The original annual drinking-water report. Every number on the Polo, IL water quality page is pulled from this document.
The Polo, IL figures for 2013 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the Polo, 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