Source document
Hay Kingdom, CA 2020 Consumer Confidence Report
The original annual drinking-water report. Every number on the Hay Kingdom, CA water quality page is pulled from this document.
The Hay Kingdom, CA figures for 2020 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the Hay Kingdom, CA 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