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