Source document
Humboldt Municipal Water Dept, IA 2025 Consumer Confidence Report
The original annual drinking-water report. Every number on the Humboldt Municipal Water Dept, IA water quality page is pulled from this document.
The Humboldt Municipal Water Dept, IA figures for 2025 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the Humboldt Municipal Water Dept, IA 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