Source document
Intermountain Gas Company, ID 2020 Consumer Confidence Report
The original annual drinking-water report. Every number on the Intermountain Gas Company, ID water quality page is pulled from this document.
The Intermountain Gas Company, ID figures for 2020 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the Intermountain Gas Company, ID 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