Source document
Derby Ing, TX 2016 Consumer Confidence Report
The original annual drinking-water report. Every number on the Derby Ing, TX water quality page is pulled from this document.
The Derby Ing, TX figures for 2016 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the Derby Ing, 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