Source document
Oak Hill Water System, TX 1999 Consumer Confidence Report
The original annual drinking-water report. Every number on the Oak Hill Water System, TX water quality page is pulled from this document.
The Oak Hill Water System, TX figures for 1999 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the Oak Hill Water System, TX 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