PlainWater
Counties → Texas

Collin County, Texas

Water Systems
35
Population Served
1,246,210
Total Violations
1,149
87 health-based
PFAS Detected
23
of 23 tested

Violation Analysis

100.0%
Systems with Violations
32.8
Avg Violations per System
7.6%
Health-Based Violations

Water Source Types

SW
28 systems (80%)
GW
7 systems (20%)

PFAS Contamination

23
Systems Tested
23
PFAS Detected
100.0%
Detection Rate

PFAS (per- and polyfluoroalkyl substances) are persistent chemicals found in drinking water. The EPA has set enforceable limits for several PFAS compounds under UCMR5 monitoring.

Compliance Snapshot

Collin Texas water systems by violation status, EPA SDWIS records.

No violations on record (0) One or more violations (35)

Violation history is cumulative, many flagged systems have already returned to compliance. Detail pages show per-system context.

Water Systems

System Name Population Violations PFAS
City of Plano 292,059 17 Detected
City of Frisco 231,910 42 Detected
City of McKinney 224,043 12 Detected
City of Allen 104,870 10 Detected
City of Celina 52,701 57 Detected
City of Wylie 47,322 11 Detected
Town of Prosper 42,598 5 Detected
City of Princeton 37,019 51 Detected
Culleoka WSC 24,615 17 Detected
City of Anna 23,960 70 Detected
City of Murphy 19,185 18 Detected
City of Melissa 18,020 27 Detected
East Fork Sud 17,589 4 Detected
Bear Creek Sud 15,822 18 Detected
Wylie Northeast Sud 11,430 14 Detected
Town of Fairview 11,100 88 Detected
North Collin Sud 10,674 34 Detected
City of Josephine 9,800 25 Detected
City of Lucas 9,080 20 Detected
City of Parker 6,486 74 Detected
City of Farmersville 5,312 57 Detected
Copeville Sud 4,375 23 Detected
Nevada Sud 4,218 15 Detected
Verona Sud 3,672 27 -
Milligan WSC 3,364 20 -
North Custer Road Plant 2,754 8 -
Frognot Sud 2,643 18 -
Westminster Sud 2,424 4 -
Desert WSC 2,091 18 -
Seis Lagos Utility District 2,037 26 -
City of Blue Ridge 1,189 44 -
Weston WSC 912 40 -
North Farmersville WSC 747 93 -
Air Park Estates 96 99 -
North Texas MWD Wylie WTP 93 43 -

Other Counties in Texas

Harris County
1,292 systems · 6,016,117 served · 78,495 violations
Dallas County
37 systems · 3,180,170 served · 2,618 violations
Bexar County
82 systems · 2,376,579 served · 13,955 violations
Tarrant County
113 systems · 2,099,244 served · 10,564 violations
Travis County
138 systems · 1,547,700 served · 7,557 violations
El Paso County
39 systems · 956,978 served · 6,717 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Collin County? ▼
Collin County has 1,149 total drinking water violations across 35 water systems, of which 87 are health-based violations. 100.0% of systems have at least one violation.
How many people get water from Collin County systems? ▼
Water systems in Collin County serve approximately 1,246,210 people through 35 public water systems.
Has PFAS been detected in Collin County water? ▼
Of 23 water systems tested for PFAS in Collin County, 23 had PFAS detected (100.0% detection rate).
What types of water sources supply Collin County? ▼
Water systems in Collin County use SW (28 systems), GW (7 systems) as their primary water sources.
Are health-based violations serious? ▼
Health-based violations indicate that drinking water exceeded Maximum Contaminant Levels (MCLs) set by the EPA or failed treatment technique requirements. 7.6% of Collin County's violations are health-based. Not all violations indicate immediate health risk, but they require corrective action.
Data Sources & Methodology

Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). PFAS testing data from the UCMR5 monitoring program. SDWIS tracks all public water systems regulated under the Safe Drinking Water Act.

Violations are categorized as health-based (Maximum Contaminant Level exceedances, treatment technique failures) or monitoring/reporting violations. Not all violations indicate an immediate health risk.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.