Source document
Usibelli Coal Mine, AK 2021 Consumer Confidence Report
The original annual drinking-water report. Every number on the Usibelli Coal Mine, AK water quality page is pulled from this document.
The Usibelli Coal Mine, AK figures for 2021 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the Usibelli Coal Mine, AK 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