PlainWater
Counties → Texas

Harris County, Texas

Water Systems
1,292
Population Served
6,016,117
Total Violations
78,495
5,075 health-based
PFAS Detected
256
of 261 tested

Violation Analysis

86.3%
Systems with Violations
60.8
Avg Violations per System
6.5%
Health-Based Violations

Water Source Types

SW
31 systems (2%)
GW
19 systems (1%)

PFAS Contamination

261
Systems Tested
256
PFAS Detected
98.1%
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

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

No violations on record (2) One or more violations (48)

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 Houston 2,970,543 29 Detected
City of Pasadena 152,000 31 Detected
Clear Lake City Water Authority 89,702 12 Detected
City of Baytown 86,004 23 Detected
City of Houston Ud 5 - Kingwood 80,073 23 Clean
City of la Porte 36,569 4 Detected
City of Deer Park 34,495 60 Detected
Harris County MUD 165 30,483 4 Detected
City of Katy 25,253 6 Clean
Bridgestone MUD 24,528 13 Detected
Timber Lane Utility District 24,507 7 Clean
Northwest Harris County MUD 5 23,766 27 Detected
Harris County Fwsd 51 19,671 11 Detected
Cimarron MUD 19,338 3 Clean
City of West University Place 19,200 80 Detected
Harris County MUD 82 18,990 29 Clean
Northwest Park MUD 18,168 17 Clean
Clear Brook City MUD 18,108 40 Detected
City of Bellaire 18,090 8 Detected
Harris Montgomery Counties MUD 386 18,018 0 Clean
Harris County MUD 53 17,856 9 Detected
City of Tomball 17,532 8 Clean
City of South Houston 17,397 28 Detected
Harris County MUD 71 17,079 11 Clean
Harris County MUD 26 16,518 3 Clean
Harris County MUD 55 Heritage Park 16,392 20 Detected
Harris County MUD 167 15,837 90 Clean
City of Humble 15,616 6 Detected
Harris County Fwsd 61 15,400 7 Clean
Harris County MUD 200 Cranbrook 14,868 6 Detected
Harris County MUD 24 14,796 26 Detected
Cnp Utility District 14,718 6 Detected
Harris County MUD 285 14,268 4 Detected
City of Houston Willow Chase 14,169 8 Clean
Harris County MUD 105 14,151 80 Detected
Meadowhill Regional MUD 13,863 25 Clean
Harris County Wcid 21 13,845 38 Detected
Remington MUD 1 13,743 0 Detected
City of Webster 13,710 9 Detected
City of Seabrook 13,560 1 Detected
Newport MUD 13,191 17 Detected
Harris County MUD 168 13,029 10 Clean
Tomball Isd Cypress Rosehill Plant 12,600 6 -
Harris County MUD 1 12,342 1 Clean
Northampton MUD 12,162 5 Clean
Harris County MUD 157 12,087 10 Detected
Harris County MUD 368 11,835 7 Detected
Harris County MUD 81 11,514 20 Clean
Memorial Villages Water Authority 11,382 15 Detected
Harris County Utility District 6 11,262 5 Detected

Other Counties in Texas

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
Collin County
35 systems · 1,246,210 served · 1,149 violations
El Paso County
39 systems · 956,978 served · 6,717 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Harris County? ▼
Harris County has 78,495 total drinking water violations across 1,292 water systems, of which 5,075 are health-based violations. 86.3% of systems have at least one violation.
How many people get water from Harris County systems? ▼
Water systems in Harris County serve approximately 6,016,117 people through 1,292 public water systems.
Has PFAS been detected in Harris County water? ▼
Of 261 water systems tested for PFAS in Harris County, 256 had PFAS detected (98.1% detection rate).
What types of water sources supply Harris County? ▼
Water systems in Harris County use SW (31 systems), GW (19 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. 6.5% of Harris 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.