Source document
Columbus City Public Water Supply, IA 2023 Consumer Confidence Report
The original annual drinking-water report. Every number on the Columbus City Public Water Supply, IA water quality page is pulled from this document.
The Columbus City Public Water Supply, IA figures for 2023 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the Columbus City Public 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