Tapcensus

Texas

Harris County drinking water quality

1,320 active public water systems serve 6,078,903 people in Harris County. 641 are compliant, 679 had at least one EPA violation in the past three years, 26 are designated serious violators, and 56 carry a health flag.

Active systems 1,320 714 community systems
People served 6.1M by public water systems
Systems with violations 679 51% of active systems, past 3 years
Serious violators 26 56 systems carry a health flag

Needs attention

Wyman Gordon Forgings TX1010911 · Non-Transient non-community system · Serves 600 4 rules violated in the past three years. Unresolved: Lead and Copper Rule (LCR), Lead and Copper Rule Revisions (LCRR), and Public Notification Rule.
JO Anns Daycare and Camp TX1012907 · Non-Transient non-community system · Serves 215 8 rules violated in the past three years. Unresolved: Lead and Copper Rule Revisions (LCRR) and Public Notification Rule.
Bareback Bar and Icehouse TX1012963 · Transient non-community system · Serves 175 3 rules violated in the past three years. Unresolved: Public Notification Rule.
Lake Houston Market TX1012818 · Transient non-community system · Serves 150 3 rules violated in the past three years. Unresolved: Public Notification Rule and Revised Total Coliform Rule (RTCR).
Travis Body and Trailer TX1012983 · Non-Transient non-community system · Serves 137 6 rules violated in the past three years. Unresolved: Lead and Copper Rule (LCR), Lead and Copper Rule Revisions (LCRR), and Public Notification Rule.
Triangle Metal & Manufacturing CO TX1011639 · Non-Transient non-community system · Serves 134 6 rules violated in the past three years. Unresolved: E. coli (Escherichia coli), Lead and Copper Rule Revisions (LCRR), and Public Notification Rule.
Hamilton Estates Water System TX1012916 · Community water system · Serves 123 12 rules violated in the past three years. Unresolved: E. coli (Escherichia coli), Lead and Copper Rule (LCR), Lead and Copper Rule Revisions (LCRR), Public Notification Rule, and Revised Total Coliform Rule (RTCR).
Binford Place Subdivision TX1011551 · Community water system · Serves 120 10 rules violated in the past three years. Unresolved: Lead and Copper Rule Revisions (LCRR) and Public Notification Rule.
Pine Oak Forest Water TX1010751 · Community water system · Serves 105 12 rules violated in the past three years. Unresolved: Lead and Copper Rule Revisions (LCRR) and Public Notification Rule.
Xpo Logistics Freight Lhw TX1012923 · Non-Transient non-community system · Serves 105 2 rules violated in the past three years. Unresolved: Public Notification Rule.

55 more systems with a serious violator or health flag designation are in the lists below.

Community water systems

714 systems, largest first
SystemServesStatusRules violated, 3 yrUnresolved
City of Houston
 2,970,543 1 0
City of Pasadena
 152,000 1 1
Clear Lake City Water Authority
 89,702 0 0
City of Baytown
 86,004 1 0
City of Houston UD 5 Kingwood
 80,073 0 0
Harris County MUD 165
 40,503 0 0
City of la Porte
 36,569 1 0
City of Deer Park
 34,495 0 0
Northwest Harris County MUD 5
 25,425 0 0
City of Katy
 25,253 1 0
Bridgestone MUD
 24,528 1 0
Timber Lane Utility District
 24,507 2 0
Harris County Fwsd 51
 19,671 1 0
Cimarron MUD
 19,338 0 0
City of West University Place
 19,200 3 2
Harris County MUD 82
 18,990 1 0
Clear Brook City MUD
 18,246 0 0
Northwest Park MUD
 18,168 1 1
City of Bellaire
 18,090 3 1
Harris Montgomery Counties MUD 386
 18,018 0 0
Harris County MUD 53
 17,856 1 1
City of Tomball
 17,532 0 0
City of South Houston
 17,397 1 0
Harris County MUD 26
 17,178 1 1
Harris County MUD 71
 17,079 0 0
Harris County MUD 167
 16,761 1 1
Harris County MUD 55 Heritage Park
 16,392 0 0
City of Humble
 15,616 0 0
Harris County Fwsd 61
 15,400 1 0
Harris County MUD 105
 14,925 1 1
Harris County MUD 200 Cranbrook
 14,868 0 0
Harris County MUD 24
 14,796 0 0
Cnp Utility District
 14,718 0 0
Harris County MUD 285
 14,268 2 0
City of Houston Willow Chase
 14,169 0 0
Meadowhill Regional MUD
 13,863 0 0
Harris County Wcid 21
 13,845 3 0
Remington MUD 1
 13,746 0 0
City of Webster
 13,710 0 0
City of Seabrook
 13,560 1 0
Harris County MUD 120
 13,197 0 0
Newport MUD
 13,191 1 0
Harris County MUD 157
 13,062 0 0
Harris County MUD 168
 13,029 0 0
Harris County MUD 1
 12,342 0 0
Northampton MUD
 12,162 0 0
Harris County MUD 368
 11,853 0 0
Harris County MUD 153
 11,781 0 0
Harris County MUD 81
 11,475 0 0
Memorial Villages Water Authority
 11,382 1 1
Non-community systems (606: schools, campgrounds, workplaces, restaurants)

These systems serve places people visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
Tomball Isd Cypress Rosehill Plant
 12,600 3 0
Lyndon B Johnson Space Center
 8,530 1 0
Exxon Mobil Baytown Refinery
 7,000 1 0
MD Anderson Cancer Center Alkek
 6,500 0 0
Katy Isd Mayde Creek School Complex
 5,960 0 0
Aldine Isd Grace Raymond Elementary Scho
 4,000 2 0
Harris County Facility & Property Mgmt
 3,000 6 0
Pemex Deer Park
 2,585 2 0
Tomball Isd Rosehill Elementary
 2,519 3 1
Industrial Utilities Service
 2,500 1 1
Six Flags Splashtown
 2,500 0 0
Aldine Isd Mattie a Teague Middle School
 2,013 2 0
Aldine Isd Bill J Wilson Intermediate
 2,000 2 0
Equistar Chemicals Channelview
 2,000 1 0
Harris County Pct 4 Bear Creek Pioneers
 2,000 0 0
Huffman Isd Hargrave High School
 1,700 1 1
Cfsa Schiel Road Sports Complex
 1,500 1 0
Katy-Hockley Business Park
 1,500 1 0
Smith International
 1,400 2 2
Toshiba International Corp
 1,355 0 0
Houston Country Club Water Plant
 1,300 2 1
Taqueria Buey de Y Vaca
 1,200 2 0
West Harris County MUD 16
 1,175 2 1
Laporte Rail and Terminal
 1,023 3 0
Blackhorse Storage
 1,000 2 0
Harris County MUD 63
 1,000 0 0
Harris County Pct 3 a D Dyess Park
 1,000 2 1
Houston Motorsports Park
 1,000 1 0
Houston Refining
 1,000 2 0
Dril-Quip
 950 0 0
Cypress Bible Church
 949 1 0
Thc San Jacinto Monument Shs
 900 0 0
Crossroads Fellowship Church
 800 5 1
Rohm & Haas TX Deer Park
 800 1 1
Spring Cypress Center
 800 1 0
Ineos Polyethylene North America la Port
 705 0 0
Shaffer West Little York Road Facility
 699 2 0
Albemarle Pasadena Plant
 680 0 0
Harris County MUD 406
 680 0 0
Lubrizol Deer Park Plant
 600 2 2
Sst Woodlands
 600 7 0
Sunny Flea Market
 600 0 0
Windfern Park Water System
 600 2 0
Witten Water System Dairy Queen
 600 0 0
Wyman Gordon Forgings
 600 4 2
The Church in Houston
 560 0 0
Harris County MUD 170
 500 0 0
Mercado-Sabadomingo
 500 0 0
Oceaneering
 500 2 2
Our Lady of Lavang Church
 500 1 1
S C Utilities
 500 2 1
Spring Cypress WSC
 500 0 0
Pasadena Plastics Complex
 490 2 1
147th T a N G
 450 5 1
Celanese Ltd-Clear Lake
 450 0 0
Harris County Pct 1 Tom Bass I
 450 1 0
Harris County MUD 438
 426 0 0
Harris County MUD 182
 425 0 0
Holiday Inn
 425 6 0
The Rhodes School Wallisville Road
 425 1 0
Nci Building Systems
 403 5 3
Barbours Cut Terminal
 400 1 0
First Baptist Church Huffman
 400 2 1
Northwoods Industrial Park East
 400 2 0
Salem Lutheran School
 400 0 0
Spring Business Center II
 400 0 0
Greens Parkway MUD
 387 0 0
Camfield MUD
 350 0 0
Champions Masjid
 350 0 0
Regina Caeli Parish
 350 0 0
Sahara Food Mart
 350 0 0
The Springs Event Venue
 350 2 1
Totalenergies Petrochemicals & Refining
 350 4 0
Center Point Energy Control Data Ctr
 347 0 0
Baker Hughes Emmott RD Plant
 319 8 0
Harris County Pct 3 Burroughs Park
 300 0 0
Harris County Pct 4 Four Seasons Park
 300 0 0
Lyondell Chemical CO Bayport
 300 0 0
Myrex Industries
 300 2 0
Parkway Grocery & Hardware Center
 300 0 0
Sheridan MJ & Son
 300 0 0
Target Center Water Plant
 300 0 0
Tpc Group Houston Plant
 300 1 0
West Harris County MUD 21
 300 0 0
Humble Travel Plaza
 295 0 0
Urban Market C-Store
 295 0 0
Anointed Faith Family Church
 293 0 0
Rankin Park
 290 2 0
Battleground Chlor Alkali Plant
 276 0 0
7-Eleven Store 41682
 275 2 0
Fuel Maxx 103
 275 0 0
Fuel Maxx 107
 275 0 0
Houston First Church of God
 275 2 0
Sam Houston Shell
 275 1 0
Clean Harbors Deer Park
 270 4 1
Dollar General Store 18431
 270 0 0
Quick Time
 270 0 0
Chevron Mini Stop
 260 3 0
Intercontinental Terminals Deer Park Ter
 258 1 0
Hufsmith RV Park
 252 0 0
All 606 in the systems table
Inactive systems (1,175, no longer operating or reporting)

Kept for the record and excluded from the county totals above. Browse inactive systems.

About this data

Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.

Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Texas records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.