Source document
Duncombe Water Supply, IA 2024 Consumer Confidence Report
The original annual drinking-water report. Every number on the Duncombe Water Supply, IA water quality page is pulled from this document.
The Duncombe Water Supply, IA figures for 2024 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the Duncombe Water Supply, 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