Source document
Grand Harbor Wsc, TX 2025 Consumer Confidence Report
The original annual drinking-water report. Every number on the Grand Harbor Wsc, TX water quality page is pulled from this document.
The Grand Harbor Wsc, TX figures for 2025 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the Grand Harbor Wsc, 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