Source document
Nichols Hills, OK 1995 Consumer Confidence Report
The original annual drinking-water report. Every number on the Nichols Hills, OK water quality page is pulled from this document.
The Nichols Hills, OK figures for 1995 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the Nichols Hills, OK 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