Texas Water Systems

Compiled by PlainEnviro · August 25, 2026

4,620 community water systems in Texas, ranked by violation count. Data from EPA Safe Drinking Water Information System (SDWIS).

Water Systems

4,620

Health-Based Violation Records

35,693

Health Violations

1,807 systems

Population Served

33,092,796

Texas community water systems are regulated by the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act; each utility files compliance results with the state's primacy agency and, for federally listed contaminants, with the U.S. Environmental Protection Agency directly. PlainEnviro's health-based SDWIS extract above counts health-based exceedances only -- monitoring and reporting violations are not present in these figures.

Violation counts reflect both infrastructure realities and reporting diligence, a state with more small rural systems will accumulate more monitoring-type violations without necessarily delivering worse water. Health-based violations are the stronger safety signal. A past violation does not itself indicate current unsafe water; utilities must notify customers, remediate, and publish an annual Consumer Confidence Report. All numbers below draw directly from the federal SDWIS record.

Which water systems have violations? (162)

#	System Name	City	Source	Violations	Pop. Served	Health
1	CITY OF WOLFFORTH Wolfforth	Wolfforth	Surface Water	190	9,600	Yes
2	CITY OF ANDREWS Andrews	Andrews	Groundwater	149	14,109	Yes
3	ORANGE COUNTY WCID 1 Vidor	Vidor	Groundwater	145	15,258	Yes
4	CRYSTAL CLEAR SUD San Marcos	San Marcos	Surface Water	93	20,766	Yes
5	MAXWELL SUD Maxwell	Maxwell	Surface Water	91	16,104	Yes
6	WEBB COUNTY WATER UTILITIES Laredo	Laredo	Surface Water	82	8,358	Yes
7	CITY OF PORT LAVACA Port Lavaca	Port Lavaca	Surface Water	80	12,000	Yes
8	HUDSON WSC Lufkin	Lufkin	Groundwater	68	10,907	Yes
9	WALNUT CREEK SUD Springtown	Springtown	Surface Water	67	30,364	Yes
10	MILITARY HWY WSC LAS RUSIAS Progreso	Progreso	Surface Water	67	17,943	Yes
11	CITY OF BEEVILLE Beeville	Beeville	Surface Water	57	13,664	Yes
12	CITY OF KERRVILLE Kerrville	Kerrville	Surface Water	55	23,489	Yes
13	CITY OF BASTROP Bastrop	Bastrop	Surface Water	50	13,209	Yes
14	ATASCOSA RURAL WSC Atascosa	Atascosa	Surface Water	47	13,857	Yes
15	CITY OF BIG SPRING Big Spring	Big Spring	Surface Water	45	27,282	Yes
16	KEMPNER WSC Kempner	Kempner	Surface Water	45	17,721	Yes
17	CITY OF TEMPLE Temple	Temple	Surface Water	44	94,935	Yes
18	CITY OF TYLER Tyler	Tyler	Surface Water	35	107,000	Yes
19	CITY OF COMMERCE Commerce	Commerce	Surface Water	34	9,266	Yes
20	CITY OF PFLUGERVILLE Pflugerville	Pflugerville	Surface Water	32	63,464	Yes
21	SPRINGS HILL SUD Seguin	Seguin	Surface Water	26	35,541	Yes
22	CITY OF LA GRULLA La Grulla	La Grulla	Surface Water	26	9,500	Yes
23	TRAIL OF THE LAKES MUD Houston	Houston	Groundwater	26	9,480	Yes
24	NUECES COUNTY WCID 3 Robstown	Robstown	Surface Water	24	14,000	Yes
25	CITY OF JACKSONVILLE Jacksonville	Jacksonville	Surface Water	22	14,420	Yes
26	CITY OF BAY CITY Bay City	Bay City	Groundwater	20	18,061	Yes
27	CITY OF HORSESHOE BAY Horseshoe Bay	Horseshoe Bay	Surface Water	19	12,729	Yes
28	CITY OF NEDERLAND Nederland	Nederland	Surface Water	18	18,157	Yes
29	CITY OF ROMA Roma	Roma	Surface Water	16	19,464	Yes
30	G M WSC Hemphill	Hemphill	Surface Water	15	11,220	Yes
31	CITY OF MIDLAND WATER PURIFICATION PLANT Midland	Midland	Surface Water	14	157,000	Yes
32	EAST CEDAR CREEK FWSD BROOKSHIRE Mabank	Mabank	Surface Water	14	14,823	Yes
33	CITY OF HITCHCOCK Hitchcock	Hitchcock	Surface Water	14	8,346	Yes
34	NUECES COUNTY WCID 4 Port Aransas	Port Aransas	Surface Water	13	14,880	Yes
35	CITY OF NACOGDOCHES Nacogdoches	Nacogdoches	Surface Water	12	50,226	Yes
36	CITY OF MONT BELVIEU Mont Belvieu	Mont Belvieu	Groundwater	12	12,864	Yes
37	CITY OF BURKBURNETT Burkburnett	Burkburnett	Surface Water	12	10,978	Yes
38	CITY OF AUSTIN WATER & WASTEWATER Austin	Austin	Surface Water	11	1,115,323	Yes
39	AGUA SUD Mission	Mission	Surface Water	11	53,796	Yes
40	CITY OF CORPUS CHRISTI Corpus Christi	Corpus Christi	Surface Water	10	318,387	Yes
41	CITY OF SEGUIN Seguin	Seguin	Surface Water	10	32,736	Yes
42	CITY OF PALESTINE Palestine	Palestine	Surface Water	10	31,272	Yes
43	WELLBORN SUD Wellborn	Wellborn	Surface Water	10	25,092	Yes
44	CITY OF GAINESVILLE Gainesville	Gainesville	Surface Water	10	18,107	Yes
45	CITY OF ATHENS Athens	Athens	Surface Water	10	17,934	Yes
46	ELDERVILLE WSC Longview	Longview	Surface Water	10	9,021	Yes
47	CITY OF SAN ANGELO San Angelo	San Angelo	Surface Water	9	105,229	Yes
48	CITY OF BOERNE Boerne	Boerne	Surface Water	9	24,769	Yes
49	CITY OF MARSHALL Marshall	Marshall	Surface Water	9	23,091	Yes
50	CITY OF WHITE SETTLEMENT White Settlement	White Settlement	Surface Water	9	18,522	Yes
51	CITY OF LAREDO Laredo	Laredo	Surface Water	8	260,046	Yes
52	NORTH ALAMO WSC Edinburg	Edinburg	Surface Water	8	171,195	Yes
53	MANVILLE WSC Coupland	Coupland	Surface Water	8	39,648	Yes
54	GOFORTH SUD Niederwald	Niederwald	Surface Water	8	34,893	Yes
55	JONAH WATER SUD Hutto	Hutto	Surface Water	8	29,861	Yes
56	LAMAR COUNTY WATER SUPPLY DISTRICT Paris	Paris	Surface Water	8	25,569	Yes
57	CITY OF RIO GRANDE CITY Rio Grande	Rio Grande	Surface Water	8	18,912	Yes
58	CYPRESS SPRINGS SUD N PLANT 1 AND NE PLA Mount Vernon	Mount Vernon	Surface Water	8	13,698	Yes
59	HARRIS COUNTY MUD 157 Houston	Houston	Surface Water	8	13,062	Yes
60	WEST JEFFERSON COUNTY MWD Beaumont	Beaumont	Surface Water	8	9,367	Yes
61	CITY OF LIBERTY HILL Liberty Hill	Liberty Hill	Surface Water	8	8,777	Yes
62	CLWSC CANYON LAKE SHORES Canyon Lake	Canyon Lake	Surface Water	7	44,196	Yes
63	WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY Austin	Austin	Surface Water	7	35,664	Yes
64	CITY OF GROVES Groves	Groves	Surface Water	7	17,335	Yes
65	CITY OF LAGO VISTA Lago Vista	Lago Vista	Surface Water	7	8,698	Yes
66	SJWTX TRIPLE PEAK PLANT Canyon Lake	Canyon Lake	Surface Water	6	32,973	Yes
67	ACTON MUD Granbury	Granbury	Surface Water	6	20,458	Yes
68	CITY OF BRENHAM Brenham	Brenham	Surface Water	6	18,469	Yes
69	CITY OF MINERAL WELLS Mineral Wells	Mineral Wells	Surface Water	6	15,564	Yes
70	MONTGOMERY COUNTY MUD 60 The Woodlands	The Woodlands	Surface Water	6	15,036	Yes
71	CITY OF BRIDGE CITY City Of Bridge City	City Of Bridge City	Groundwater	6	9,546	Yes
72	WALNUT GROVE WSC Whitehouse	Whitehouse	Surface Water	6	8,775	Yes
73	CITY OF PORT ARTHUR Port Arthur	Port Arthur	Surface Water	5	56,039	Yes
74	CITY OF PARIS Paris	Paris	Surface Water	5	25,498	Yes
75	CITY OF PORTLAND Portland	Portland	Surface Water	5	22,933	Yes
76	HEREFORD MUNICIPAL WATER SYSTEM Hereford	Hereford	Groundwater	5	16,048	Yes
77	CITY OF GRANBURY Granbury	Granbury	Surface Water	5	11,468	Yes
78	CITY OF KYLE Kyle	Kyle	Surface Water	4	52,000	Yes
79	CITY OF FORNEY Forney	Forney	Surface Water	4	29,692	Yes
80	PORTER SPECIAL UTILITY DISTRICT Porter	Porter	Groundwater	4	26,388	Yes
81	SONTERRA MUD Austin	Austin	Surface Water	4	16,614	Yes
82	CITY OF MABANK Mabank	Mabank	Surface Water	4	15,207	Yes
83	ZAPATA COUNTY WATERWORKS SWTP Zapata	Zapata	Surface Water	4	13,736	Yes
84	BROOKESMITH SPECIAL UTILITY DISTRICT Brownwood	Brownwood	Surface Water	4	13,026	Yes
85	BI COUNTY WSC 1 Pittsburg	Pittsburg	Groundwater	4	12,777	Yes
86	MEMORIAL VILLAGES WATER AUTHORITY Houston	Houston	Surface Water	4	11,382	Yes
87	CITY OF BELLMEAD Bellmead	Bellmead	Groundwater	4	10,664	Yes
88	MISSION BEND MUD 2 Houston	Houston	Groundwater	4	10,155	Yes
89	CITY OF FORT WORTH Fort Worth	Fort Worth	Surface Water	3	955,900	Yes
90	CITY OF ABILENE Abilene	Abilene	Surface Water	3	130,501	Yes
91	CITY OF ODESSA Odessa	Odessa	Surface Water	3	123,334	Yes
92	CITY OF EDINBURG Edinburg	Edinburg	Surface Water	3	85,224	Yes
93	CITY OF SAN MARCOS San Marcos	San Marcos	Surface Water	3	72,970	Yes
94	CITY OF TEXAS CITY Texas City	Texas City	Surface Water	3	61,541	Yes
95	CITY OF SAN BENITO San Benito	San Benito	Surface Water	3	24,250	Yes
96	CITY OF ANNA Anna	Anna	Surface Water	3	23,960	Yes
97	CITY OF SULPHUR SPRINGS Sulphur Springs	Sulphur Springs	Surface Water	3	16,243	Yes
98	HARRIS COUNTY MUD 24 Houston	Houston	Surface Water	3	14,796	Yes
99	CITY OF DUMAS Dumas	Dumas	Groundwater	3	14,290	Yes
100	CITY OF WILLIS Willis	Willis	Groundwater	3	14,133	Yes
101	HARRIS COUNTY WCID 21 Channelview	Channelview	Surface Water	3	13,845	Yes
102	CITY OF ROCKPORT Rockport	Rockport	Surface Water	3	11,186	Yes
103	CITY OF GALENA PARK Galena Park	Galena Park	Surface Water	3	10,487	Yes
104	OLMITO WSC Olmito	Olmito	Surface Water	3	8,952	Yes
105	CITY OF GRAHAM Graham	Graham	Surface Water	3	8,718	Yes
106	KINGSBRIDGE MUD Houston	Houston	Surface Water	3	8,663	Yes
107	CITY OF HOUSTON Houston	Houston	Surface Water	2	2,970,543	Yes
108	SHARYLAND WSC Mission	Mission	Surface Water	2	68,562	Yes
109	CITY OF HURST Hurst	Hurst	Surface Water	2	40,454	Yes
110	JBSA SAM HOUSTON San Antonio	San Antonio	Groundwater	2	37,563	Yes
111	CITY OF SOUTHLAKE Southlake	Southlake	Surface Water	2	31,576	Yes
112	CITY OF HUTTO Hutto	Hutto	Surface Water	2	29,580	Yes
113	CITY OF MIDLOTHIAN Midlothian	Midlothian	Surface Water	2	27,699	Yes
114	CITY OF COLLEYVILLE Colleyville	Colleyville	Surface Water	2	26,599	Yes
115	CITY OF MELISSA Melissa	Melissa	Surface Water	2	26,234	Yes
116	EAST RIO HONDO WSC Rio Hondo	Rio Hondo	Surface Water	2	24,756	Yes
117	MONTGOMERY COUNTY MUD 47 The Woodlands	The Woodlands	Surface Water	2	24,171	Yes
118	MOUNTAIN PEAK SUD Midlothian	Midlothian	Surface Water	2	23,988	Yes
119	WINDERMERE COMMUNITY Austin	Austin	Surface Water	2	21,231	Yes
120	CITY OF SEAGOVILLE Seagoville	Seagoville	Surface Water	2	20,156	Yes
121	CITY OF CROWLEY Crowley	Crowley	Surface Water	2	19,935	Yes
122	COUNTY LINE SUD Uhland	Uhland	Surface Water	2	19,609	Yes
123	CITY OF PORT NECHES Port Neches	Port Neches	Surface Water	2	17,043	Yes
124	CITY OF GATESVILLE Gatesville	Gatesville	Surface Water	2	16,135	Yes
125	CITY OF LIVINGSTON Livingston	Livingston	Surface Water	2	15,199	Yes
126	KINGSLAND WSC Kingsland	Kingsland	Surface Water	2	12,975	Yes
127	MONTGOMERY COUNTY MUD 7 The Woodlands	The Woodlands	Surface Water	2	12,528	Yes
128	CITY OF ROBINSON Robinson	Robinson	Surface Water	2	11,900	Yes
129	TOWN OF FAIRVIEW Fairview	Fairview	Surface Water	2	11,100	Yes
130	CITY OF HONDO Hondo	Hondo	Groundwater	2	11,044	Yes
131	JBSA RANDOLPH San Antonio	San Antonio	Groundwater	2	10,949	Yes
132	CITY OF ROANOKE Roanoke	Roanoke	Surface Water	2	10,127	Yes
133	CITY OF WHITEHOUSE Whitehouse	Whitehouse	Surface Water	2	9,571	Yes
134	CITY OF LAMESA Lamesa	Lamesa	Surface Water	2	9,442	Yes
135	Kickapoo Traditional Tribe Eagle Pass	Eagle Pass	Surface Water	2	9,384	Yes
136	CITY OF PEARSALL Pearsall	Pearsall	Groundwater	2	8,985	Yes
137	CITY OF BROWNFIELD Brownfield	Brownfield	Surface Water	2	8,652	Yes
138	PERRYTON MUNICIPAL WATER SYSTEM Perryton	Perryton	Groundwater	2	8,492	Yes
139	RICE UNIVERSITY Houston	Houston	Surface Water	2	8,415	Yes
140	TBCD WINNIE STOWELL Stowell	Stowell	Surface Water	2	8,397	Yes
141	TEXAS STATE UNIVERSITY - SAN MARCOS San Marcos	San Marcos	Groundwater	1	43,552	Yes
142	CITY OF WESLACO Weslaco	Weslaco	Surface Water	1	40,033	Yes
143	CITY OF DEER PARK Deer Park	Deer Park	Surface Water	1	34,495	Yes
144	CITY OF BALCH SPRINGS Balch Springs	Balch Springs	Surface Water	1	28,300	Yes
145	CITY OF ROYSE CITY Royse City	Royse City	Surface Water	1	24,313	Yes
146	CITY OF TAYLOR Taylor	Taylor	Surface Water	1	20,622	Yes
147	CITY OF ORANGE Orange	Orange	Groundwater	1	19,300	Yes
148	FORT BEND COUNTY MUD 30 Houston	Houston	Surface Water	1	16,794	Yes
149	CITY OF MERCEDES Mercedes	Mercedes	Surface Water	1	16,258	Yes
150	CITY OF KILGORE Kilgore	Kilgore	Surface Water	1	14,948	Yes
151	CITY OF HIDALGO WATER SYSTEM Hidalgo	Hidalgo	Groundwater	1	14,800	Yes
152	CITY OF HENDERSON Henderson	Henderson	Surface Water	1	14,666	Yes
153	CITY OF LEVELLAND Levelland	Levelland	Surface Water	1	12,652	Yes
154	CITY OF VERNON Vernon	Vernon	Groundwater	1	11,002	Yes
155	NORTH COLLIN SUD Melissa	Melissa	Surface Water	1	10,716	Yes
156	CITY OF INGLESIDE Ingleside	Ingleside	Surface Water	1	10,106	Yes
157	CONCORD ROBBINS WSC Marquez	Marquez	Groundwater	1	10,035	Yes
158	CITY OF SPLENDORA Splendora	Splendora	Groundwater	1	9,612	Yes
159	CITY OF WOODWAY Woodway	Woodway	Surface Water	1	9,383	Yes
160	NAVAL AIR STN JOINT RESERVE BASE Fort Woth	Fort Woth	Surface Water	1	9,000	Yes
161	CITY OF WHARTON Wharton	Wharton	Groundwater	1	8,756	Yes
162	CITY OF FLORESVILLE Floresville	Floresville	Groundwater	1	8,306	Yes

Systems with No Violations (338)

338 water systems in Texas have zero recorded violations. Showing the 50 largest by population served.

SAN ANTONIO WATER SYSTEM (2,643,729) DALLAS WATER UTILITY (1,356,479) EL PASO WATER UTILITIES (747,168) CITY OF ARLINGTON (413,955) CITY OF PLANO (292,059) LUBBOCK PUBLIC WATER SYSTEM (275,041) CITY OF IRVING (264,546) CITY OF GARLAND (248,822) CITY OF FRISCO (231,910) CITY OF MCKINNEY (224,043) CITY OF GRAND PRAIRIE (201,843) AMARILLO MUNICIPAL WATER SYSTEM (201,291) BROWNSVILLE PUBLIC UTILITIES BOARD (201,249) CITY OF GEORGETOWN (191,639) MCALLEN PUBLIC UTILITY (189,957) CITY OF KILLEEN (161,027) CITY OF MESQUITE (152,020) CITY OF PASADENA (152,000) CITY OF DENTON (150,037) CITY OF LEAGUE CITY (149,557) CITY OF WACO (146,241) CITY OF LEWISVILLE (140,880) CITY OF CARROLLTON (136,170) CITY OF ROUND ROCK (130,662) CITY OF PEARLAND (125,828) CITY OF RICHARDSON (122,615) NEW BRAUNFELS UTILITIES (116,477) CITY OF BEAUMONT WATER UTILITY DEPT (115,282) CITY OF CONROE (113,912) CITY OF ALLEN (113,746) MUSTANG SUD (110,826) CITY OF COLLEGE STATION (104,103) CITY OF WICHITA FALLS (102,316) CITY OF LEANDER (98,330) CITY OF BRYAN (91,031) CITY OF SUGAR LAND (90,909) CLEAR LAKE CITY WATER AUTHORITY (89,702) CITY OF MANSFIELD (89,227) CITY OF CEDAR PARK (86,939) AQUA WSC (86,325) CITY OF BAYTOWN (86,004) HARLINGEN WATER WORKS SYSTEM (85,900) CITY OF LONGVIEW (83,236) CITY OF HOUSTON UD 5 - KINGWOOD (80,073) TOWN OF FLOWER MOUND (80,000) CITY OF PHARR (79,715) CITY OF MISSION (77,058) CITY OF NORTH RICHLAND HILLS (74,859) SOUTHERN UTILITIES (69,735) CITY OF ROWLETT (68,123) +288 more

All Water Systems in Texas (4,620)

Page 18 of 93, ordered by population served.

System	Population Served	Violations
COLEMAN COUNTY SUD	5,000	24
CITY OF MEADOWS PLACE	5,000	0
MONTGOMERY COUNTY UD 4	4,980	0
CITY OF LA GRANGE	4,973	20
CITY OF HEARNE	4,959	0
TULIA MUNICIPAL WATER SYSTEM	4,951	0
NORTH GREEN MUD	4,941	0
CITY OF TAFT	4,941	4
CITY OF WILLOW PARK	4,936	2
RICEWOOD MUD	4,908	0
CITY OF SMITHVILLE	4,901	1
HARRIS COUNTY MUD 383	4,881	0
KLEINWOOD MUD	4,872	4
BRUSHY CREEK WSC	4,866	8
CITY OF LYTLE	4,860	2
HARRIS COUNTY MUD 104	4,854	0
LOUETTA NORTH PUD	4,848	0
CITY OF MISSOURI CITY	4,847	0
WICKSON CREEK SUD GRIMES COUNTY	4,843	0
WEST BELL COUNTY WSC	4,842	1
HARRIS COUNTY MUD 221	4,839	0
NORTH HUNT SUD	4,836	11
BRAZORIA COUNTY MUD 21	4,833	0
FORT BEND COUNTY MUD 116 CANYON GATE	4,833	0
CHALK HILL SUD	4,830	0
ROSE HILL SUD	4,827	0
GOLDEN WSC	4,821	0
HARRIS COUNTY MUD 432	4,782	0
FILES VALLEY WSC	4,776	0
DOBBIN PLANTERSVILLE WSC 1	4,767	10
MONTGOMERY COUNTY MUD 89	4,761	0
HARRIS COUNTY MUD 119	4,758	0
HARRIS COUNTY WCID 92	4,752	0
CINCO MUD 2	4,743	0
HARRIS COUNTY MUD 50	4,743	0
HARRIS COUNTY MUD 501	4,740	0
CITY OF LAKE WORTH	4,720	0
FORT BEND COUNTY MUD 129	4,713	0
HARRIS COUNTY MUD 360	4,707	0
CITY OF PALACIOS	4,700	1
CITY OF CADDO MILLS	4,688	2
LAZY NINE MUD 1B	4,669	2
HARRIS COUNTY MUD 106	4,668	0
FORT BEND COUNTY MUD 5	4,665	0
REID ROAD MUD 2	4,662	0
FRIONA MUNICIPAL WATER SYSTEM	4,653	2
HARRIS FORT BEND COUNTIES MUD 5	4,641	0
FORT BEND COUNTY MUD 149	4,638	0
WEST HARDIN WSC	4,630	1
COMMUNITY WSC	4,629	4

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Frequently Asked Questions

How many water systems are in Texas?

Texas has 4,620 community water systems tracked by the EPA, serving a combined population of 33,092,796 people.

How many water systems in Texas have health violations?

1807 water systems in Texas have health-based violations, which include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations. These represent 39% of all systems in the state.

How many health-based violation records are in this extract for Texas?

PlainEnviro's health-based EPA SDWIS extract contains 35,693 records joined to 4,620 active community water systems in Texas. Monitoring and reporting records are not included.

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About This Data

Water system data is from the EPA Safe Drinking Water Information System (SDWIS). Health-based violations include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations that may pose a direct risk to public health. Only community water systems (CWS) are included.

Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services

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

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