City and town drinking water records

Water systems serving Houston, TX

51 community water systems have a mapped service area in Houston, TX. City of Houston covers 85% of the area inside Houston's Census boundary and reports serving 2,970,543 people in all.

3 of them (6%) had at least one health-based violation in the last 10 years. 6 systems still have one unresolved.

29 rely mainly on groundwater and 22 on surface water, counting water bought from other systems.

Their lead service line inventories list 0 lead lines, 21 galvanized lines that must be replaced and 448,326 lines of unknown material.

Community water systems: 51
Systems with a health-based violation, last 10 years: 3
Systems with one unresolved: 6
Lead service lines in inventories: 0

Water systems serving Houston

51 systems

People served is each system's own figure for its whole service area. Violation counts cover the last 10 years of EPA records.

System	Area	People served	Main source	Health-based violations, 10 years	Unresolved
City of Houston	Covers 85% of Houston	2,970,543	Surface water	1	0
City of Houston UD 5 - Kingwood	Mapped area inside Houston	80,073	Groundwater	0	0
Clear Lake City Water Authority	Mapped area inside Houston	89,702	Purchased surface water	0	0
City of Houston District 73	Mapped area inside Houston	6,105	Groundwater	0	0
City of Houston Willow Chase	Mapped area inside Houston	14,169	Groundwater	0	0
City of Houston District 82	Mapped area inside Houston	1,104	Groundwater	0	0
North Harris County Regional Water Autho	Covers under 1% of Houston	Not reported	Purchased surface water	0	1
Harris County MUD 344	Mapped area inside Houston	4,518	Purchased surface water	0	0
Baybrook MUD 1	Mapped area inside Houston	3,087	Purchased surface water	8	0
CNP Utility District	Mapped area inside Houston	14,718	Purchased surface water	0	0
Weston MUD	Mapped area inside Houston	6,699	Groundwater	0	0
Interstate MUD	Mapped area inside Houston	6,591	Groundwater	0	0
Harris County MUD 342	Mapped area inside Houston	4,035	Purchased groundwater	0	0
Southern Water	Mapped area inside Houston	3,933	Groundwater	0	0
Harris County MUD 36	Mapped area inside Houston	1,464	Groundwater	0	0
Northwood MUD 1	Mapped area inside Houston	795	Groundwater	0	0
Harris County MUD 412	Mapped area inside Houston	3,480	Purchased surface water	0	0
Harris County WCID 161	Mapped area inside Houston	3,129	Purchased surface water	0	0
Harris County MUD 372	Mapped area inside Houston	2,613	Purchased surface water	0	0
Cimarron MUD	Covers under 1% of Houston	19,338	Groundwater	0	0
West Park MUD	Mapped area inside Houston	8,106	Groundwater	0	1
Harris County MUD 361	Mapped area inside Houston	3,705	Purchased groundwater	0	0
Harris County MUD 62	Mapped area inside Houston	3,519	Groundwater	0	0
Harris County MUD 287	Mapped area inside Houston	3,510	Purchased groundwater	0	0
Richey Road MUD	Mapped area inside Houston	579	Groundwater	0	0
Harris-Fort Bend Counties MUD 3	Mapped area inside Houston	9,297	Groundwater	0	0
Rice University	Mapped area inside Houston	8,415	Purchased surface water	2	0
Harris County MUD 502	Covers under 1% of Houston	5,487	Purchased surface water	0	0
Harris County MUD 61	Mapped area inside Houston	2,016	Groundwater	0	0
Harris County MUD 383	Covers under 1% of Houston	4,881	Purchased surface water	0	0
Northwest Harris County MUD 24	Mapped area inside Houston	1,257	Groundwater	0	4
Harris County MUD 286	Mapped area inside Houston	879	Purchased surface water	0	0
City of Houston Belleau Woods	Mapped area inside Houston	381	Purchased surface water	0	0
Harris County MUD 468	Covers under 1% of Houston	7,944	Purchased surface water	0	1
Harris County MUD 189	Covers under 1% of Houston	6,906	Groundwater	0	0
Harris County MUD 221	Covers under 1% of Houston	4,839	Groundwater	0	0
Harris County MUD 358	Mapped area inside Houston	222	Groundwater	0	0
Harris County MUD 16	Covers under 1% of Houston	5,982	Purchased surface water	0	0
Harris County MUD 257	Mapped area inside Houston	3,501	Purchased surface water	0	0
North Belt Utility District	Covers under 1% of Houston	2,775	Groundwater	0	0
Oak Manor	Mapped area inside Houston	132	Groundwater	0	0
North Park PUD	Covers under 1% of Houston	6,708	Groundwater	0	0
Westador MUD	Covers under 1% of Houston	5,337	Purchased surface water	0	0
Harris County MUD 322	Covers under 1% of Houston	4,266	Purchased groundwater	0	0
Northwest Harris County MUD 21	Mapped area inside Houston	2,493	Purchased surface water	0	0
Harris County MUD 205	Mapped area inside Houston	1,560	Purchased groundwater	0	1
West Montgomery	Covers under 1% of Houston	975	Groundwater	0	0
Harris County MUD 537	Mapped area inside Houston	1,416	Purchased surface water	0	0
Harris County MUD 500	Mapped area inside Houston	1,158	Purchased surface water	0	0
Harris County WCID 156	Covers under 1% of Houston	1,116	Purchased surface water	0	0
Van Manor Mobile Home Park	Mapped area inside Houston	333	Groundwater	0	1

Other cities and towns in Harris County

34 places

Back to Harris County, TX

Counties come from the counties EPA lists each system serving, matched to 2024 Census counties; where EPA lists none, from the county coded in the system's ID, its service area map, or its mailing address. A county holding at least a fifth of a system's service area map is added when at least a fifth of that map lies in those counties. Towns are the ones EPA lists and the Census places such a map covers, always inside those counties. In New England, where EPA's town names a whole Town, it is not matched to the village of the same name. A system is not listed in a county holding less than a fifth of its map, or in a county or town its map reaches when the map lies mostly outside the counties EPA lists, so a page can leave out a system that serves part of the area. Methodology and limitations