County · Texas
Collin County, Texas: drinking water records
This overview covers 29 ZIP codes and 36 community water systems in Collin County. It also stands in for 1 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| City of Anna TX0430027 | 23,960 | 360 | 1 | 2 | 1.1 ppb |
| North Collin SUD TX0430055 | 10,716 | 360 | 1 | 1 | 1.9 ppb |
| City of Farmersville TX0430004 | 5,312 | 120 | 1 | 1 | 0.9 ppb |
| City of Plano TX0430007 | 292,059 | 120 | 4 | 0 | 1.4 ppb |
| City of Frisco TX0430005 | 231,910 | 120 | 4 | 0 | 2.3 ppb |
| City of Mckinney TX0430039 | 224,043 | 120 | 1 | 0 | 0.9 ppb |
| City of Allen TX0430025 | 113,746 | 120 | 4 | 0 | 0 ppb |
| City of Celina TX0430003 | 52,701 | 95 | 1 | 0 | 1.8 ppb |
| City of Wylie TX0430011 | 48,393 | 120 | 4 | 0 | 1.0 ppb |
| Town of Prosper TX0430009 | 42,598 | 120 | 6 | 0 | 2.0 ppb |
| City of Princeton TX0430008 | 37,019 | 120 | 1 | 0 | 2.2 ppb |
| City of Melissa TX0430040 | 26,234 | 120 | 1 | 0 | 1.4 ppb |
| Culleoka WSC TX0430030 | 24,615 | 120 | 2 | 0 | 0 ppb |
| City of Murphy TX0430042 | 21,082 | 120 | 4 | 0 | 0 ppb |
| East Fork SUD TX0430033 | 17,589 | 120 | 4 | 0 | 2.1 ppb |
| Bear Creek SUD TX0430037 | 15,822 | 240 | 5 | 0 | 1.1 ppb |
| Wylie Northeast SUD TX0430051 | 11,430 | 120 | 4 | 0 | 2 ppb |
| Town of Fairview TX0430034 | 11,100 | 120 | 2 | 0 | 1.3 ppb |
| City of Josephine TX0430036 | 9,800 | 120 | 4 | 0 | 1.3 ppb |
| Copeville SUD TX0430029 | 8,438 | 240 | 4 | 0 | 0 ppb |
| City of Lucas TX0430054 | 8,378 | 240 | 4 | 0 | 3.6 ppb |
| City of Parker TX0430045 | 6,486 | 120 | 4 | 0 | 1.2 ppb |
| Nevada SUD TX0430053 | 4,218 | 240 | 4 | 0 | 10.4 ppb |
| Desert WSC TX0430032 | 2,091 | 0 | 0 | 1 | 0 ppb |
| Weston WSC TX0430050 | 1,185 | 0 | 0 | 1 | 0 ppb |
ZIP reports in Collin County
No ZIP report in this county is published yet.
These ZIP codes are covered by this overview because their utility has too little EPA data for a separate page: 75071.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.