Harris County, Texas Water Systems

Harris County, Texas

970 community water systems on record — 712 active, 258 inactive.

Every active community water system nationwide must produce a Consumer Confidence Report under the EPA's revised rule, effective for reports due July 1, 2027.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Texas’s official records. Always confirm current status with Texas before making decisions based on this information.

Community water systems in Harris County, Texas

System name	Mailing city	Population served	Status
CITY OF HOUSTON	HOUSTON	2,970,543	Active
CITY OF PASADENA	PASADENA	152,000	Active
CLEAR LAKE CITY WATER AUTHORITY	HOUSTON	89,702	Active
CITY OF BAYTOWN	BAYTOWN	86,004	Active
CITY OF HOUSTON UD 5 - KINGWOOD	HOUSTON	80,073	Active
HOUSTON-GREENSPOINT	HOUSTON	76,323	Inactive
HARRIS COUNTY MUD 165	HOUSTON	40,503	Active
CITY OF LA PORTE	LA PORTE	36,569	Active
CITY OF DEER PARK	DEER PARK	34,495	Active
NORTHWEST HARRIS COUNTY MUD 5	HOUSTON	25,425	Active
CITY OF KATY	KATY	25,253	Active
BRIDGESTONE MUD	HOUSTON	24,528	Active
TIMBER LANE UTILITY DISTRICT	HOUSTON	24,507	Active
HARRIS COUNTY FWSD 51	HOUSTON	19,671	Active
CIMARRON MUD	HOUSTON	19,338	Active
CITY OF WEST UNIVERSITY PLACE	WEST UNIVERSITY PLACE	19,200	Active
HARRIS COUNTY MUD 82	HOUSTON	18,990	Active
NORTHWEST PARK MUD	HOUSTON	18,168	Active
CLEAR BROOK CITY MUD	HOUSTON	18,108	Active
CITY OF BELLAIRE	BELLAIRE	18,090	Active
HARRIS MONTGOMERY COUNTIES MUD 386	HOUSTON	18,018	Active
HOUSTON INTERCONTINENTAL	HOUSTON	18,000	Inactive
HARRIS COUNTY MUD 53	HOUSTON	17,856	Active
CITY OF TOMBALL	TOMBALL	17,532	Active
CITY OF SOUTH HOUSTON	SOUTH HOUSTON	17,397	Active
HARRIS COUNTY MUD 26	HOUSTON	17,178	Active
HARRIS COUNTY MUD 71	HOUSTON	17,079	Active
HARRIS COUNTY MUD 167	HOUSTON	16,761	Active
HARRIS COUNTY MUD 55 HERITAGE PARK	HOUSTON	16,392	Active
CITY OF HUMBLE	HUMBLE	15,616	Active
HARRIS COUNTY FWSD 61	HOUSTON	15,400	Active
HARRIS COUNTY MUD 105	HOUSTON	14,925	Active
HARRIS COUNTY MUD 200 CRANBROOK	HOUSTON	14,868	Active
HARRIS COUNTY MUD 24	HOUSTON	14,796	Active
CNP UTILITY DISTRICT	HOUSTON	14,718	Active
HARRIS COUNTY MUD 285	HOUSTON	14,268	Active
CITY OF HOUSTON WILLOW CHASE	HOUSTON	14,169	Active
MEADOWHILL REGIONAL MUD	HOUSTON	13,863	Active
HARRIS COUNTY WCID 21	CHANNELVIEW	13,845	Active
REMINGTON MUD 1	HOUSTON	13,746	Active
CITY OF WEBSTER	WEBSTER	13,710	Active
CITY OF SEABROOK	SEABROOK	13,560	Active
HARRIS COUNTY MUD 120	HOUSTON	13,197	Active
NEWPORT MUD	HOUSTON	13,191	Active
HARRIS COUNTY MUD 157	HOUSTON	13,062	Active
HARRIS COUNTY MUD 168	SUGAR LAND	13,029	Active
HARRIS COUNTY MUD 1	HOUSTON	12,342	Active
NORTHAMPTON MUD	HOUSTON	12,162	Active
HARRIS COUNTY MUD 368	HOUSTON	11,835	Active
HARRIS COUNTY MUD 153	HOUSTON	11,781	Active
HARRIS COUNTY MUD 81	HOUSTON	11,514	Active
MEMORIAL VILLAGES WATER AUTHORITY	HOUSTON	11,382	Active
HARRIS COUNTY UD 6	HOUSTON	11,262	Active
HARRIS COUNTY WCID 36	HOUSTON	11,073	Active
CYPRESS HILL MUD 1	HOUSTON	11,052	Active
HARRIS COUNTY MUD 49	HOUSTON	10,893	Active
HARRIS COUNTY MUD 278	HOUSTON	10,584	Active
HARRIS COUNTY WCID 96	HOUSTON	10,530	Active
GREENWOOD UTILITY DISTRICT	HOUSTON	10,527	Active
CITY OF GALENA PARK	GALENA PARK	10,487	Active
HARRIS COUNTY MUD 489	HOUSTON	10,476	Active
HARRIS COUNTY MUD 230	HOUSTON	10,404	Active
HARRIS COUNTY MUD 102	HOUSTON	10,401	Active
LANGHAM CREEK UTILITY DISTRICT	HOUSTON	10,377	Active
MISSION BEND MUD 2	HOUSTON	10,155	Active
HARRIS COUNTY WCID 109	HOUSTON	10,134	Active
PONDEROSA FOREST UTILITY DISTRICT	HOUSTON	10,101	Active
HARRIS COUNTY WCID 110	HOUSTON	9,807	Active
CITY OF JACINTO CITY	JACINTO CITY	9,613	Active
HARRIS COUNTY MUD 109	HOUSTON	9,501	Active
TRAIL OF THE LAKES MUD	HOUSTON	9,480	Active
HARRIS COUNTY MUD 188	HOUSTON	9,453	Active
HUNTERS GLEN MUD	HOUSTON	9,405	Active
HARRIS-FORT BEND COUNTIES MUD 3	HOUSTON	9,297	Active
HARRIS COUNTY WCID 119	HOUSTON	9,150	Active
HARRIS COUNTY WCID 89	HOUSTON	9,033	Active
BARKER CYPRESS MUD	HOUSTON	8,976	Active
SUNBELT FWSD HIGH MEADOWS SUBDIVISION	HOUSTON	8,946	Active
CHELFORD CITY MUD	HOUSTON	8,917	Active
FAULKEY GULLY MUD	CYPRESS	8,907	Active
MASON CREEK UTILITY DISTRICT	KATY	8,900	Active
HARRIS COUNTY MUD 391	HOUSTON	8,835	Active
HARRIS COUNTY MUD 132	HOUSTON	8,682	Active
HARRIS COUNTY WCID 1	HIGHLANDS	8,559	Active
BAYFIELD PUBLIC UTILITY DISTRICT	ALIEF	8,472	Inactive
RICE UNIVERSITY	HOUSTON	8,415	Active
JACKRABBIT ROAD PUD	HOUSTON	8,346	Active
HARRIS COUNTY MUD 154	HOUSTON	8,289	Active
HCO MUD NO 145	HOUSTON	8,283	Inactive
HARRIS COUNTY MUD 290	HOUSTON	8,259	Active
WEST HARRIS COUNTY MUD 11	HOUSTON	8,205	Active
BISSONNET MUD	HOUSTON	8,160	Active
WEST PARK MUD	HOUSTON	8,106	Active
ADDICKS UTILITY DISTRICT	HOUSTON	8,076	Active
HARRIS COUNTY MUD 468	HOUSTON	7,944	Active
NORTHWEST HARRIS COUNTY MUD 9	HOUSTON	7,848	Active
CITY OF JERSEY VILLAGE	JERSEY VILLAGE	7,792	Active
HARRIS COUNTY MUD 238	THE WOODLANDS	7,773	Active
NORTHWEST HARRIS COUNTY MUD 12	HOUSTON	7,764	Active
NORTHWEST HARRIS COUNTY MUD 10	HOUSTON	7,671	Active
WESTON MUD	HOUSTON	7,647	Active
HARRIS COUNTY MUD 151	HOUSTON	7,464	Active
CY CHAMP PUD	HOUSTON	7,428	Active
HARRIS COUNTY MUD 419	HOUSTON	7,389	Active
EMERALD FOREST UTILITY DISTRICT	HOUSTON	7,326	Active
PARKWAY UTILITY DISTRICT	HOUSTON	7,323	Active
HARRIS COUNTY MUD 152	HOUSTON	7,314	Active
HARRIS COUNTY MUD 504	HOUSTON	7,242	Active
MALCOMSON ROAD UTILITY DISTRICT	HOUSTON	7,231	Active
GULFWAY UTILITY DISTRICT	HOUSTON	7,212	Inactive
HARRIS COUNTY MUD 449	HOUSTON	7,179	Active
WINDFERN FOREST UTILITY DISTRICT	HOUSTON	7,170	Active
LAKE FOREST UTILITY DISTRICT	HOUSTON	7,106	Active
NOTTINGHAM COUNTRY MUD	HOUSTON	7,089	Active
HARRIS COUNTY MUD 196	HOUSTON	7,026	Active
DOWDELL PUD	HOUSTON	7,002	Active
HARRIS COUNTY MUD 96	HOUSTON	6,993	Active
SAGEMEADOW UTILITY DISTRICT	HOUSTON	6,975	Active
PINE TRAILS UTILITY	AUSTIN	6,969	Active
REID ROAD MUD 1	HOUSTON	6,969	Active
WEST HARRIS COUNTY MUD 2 CHASE	HOUSTON	6,921	Active
NORTHWEST HARRIS COUNTY MUD 15	HOUSTON	6,915	Active
HARRIS COUNTY MUD 189	HOUSTON	6,906	Active
SUNBELT FWSD OAKWILDE SUBDIVISION	HOUSTON	6,819	Active
HARRIS COUNTY MUD 158	HOUSTON	6,798	Active
HARRIS COUNTY MUD 150	HOUSTON	6,786	Active
HARRIS COUNTY MUD 367	HOUSTON	6,759	Active
HARRIS COUNTY MUD 64	HOUSTON	6,726	Active
FALLBROOK UTILITY DISTRICT	HOUSTON	6,720	Active
MILLS ROAD MUD	HOUSTON	6,717	Active
NORTH PARK PUD	HOUSTON	6,708	Active
WEST HARRIS COUNTY MUD 10	HOUSTON	6,697	Active
HARRIS COUNTY MUD 118	HOUSTON	6,678	Active
HARRIS COUNTY MUD 433	HOUSTON	6,651	Active
MEMORIAL MUD	SUGAR LAND	6,615	Active
HEATHERLOCH MUD	HOUSTON	6,612	Active
HORSEPEN BAYOU MUD	HOUSTON	6,597	Active
INTERSTATE MUD	HOUSTON	6,591	Active
HARRIS COUNTY MUD 354	HOUSTON	6,588	Active
HARRIS COUNTY WCID 84	HOUSTON	6,552	Active
MISSION BEND MUD 1	HOUSTON	6,546	Active
HARRIS COUNTY MUD 65	HOUSTON	6,330	Active
HCO MUD NO 90	ALIEF	6,267	Inactive
HARRIS COUNTY MUD 364	HOUSTON	6,168	Active
HARRIS COUNTY MUD 222	HOUSTON	6,129	Active
CITY OF HOUSTON DISTRICT 73	HOUSTON	6,105	Active
HARRIS COUNTY UD 16	HOUSTON	6,069	Active
HARRIS COUNTY MUD 400 - EAST	HOUSTON	6,066	Active
HCO UD NO 10	HOUSTON	6,066	Inactive
LAKE MUD	HOUSTON	6,048	Active
WEST HOUSTON AREA	HOUSTON	6,000	Inactive
HCO UD NO 8	HOUSTON	5,985	Inactive
HARRIS COUNTY MUD 16	HOUSTON	5,982	Active
HARRIS COUNTY MUD 457	HOUSTON	5,967	Active
WEST HARRIS COUNTY MUD 9	HOUSTON	5,961	Active
HARRIS COUNTY MUD 43	SPRING	5,940	Active
PRESTONWOOD FOREST UTILITY DISTRICT	HOUSTON	5,940	Active
HARRIS COUNTY MUD 180	HOUSTON	5,892	Active
HARRIS COUNTY WCID 74	HOUSTON	5,886	Active
CHARTERWOOD MUD	HOUSTON	5,832	Active
HARRIS COUNTY MUD 70	HOUSTON	5,763	Active
HARRIS COUNTY MUD 319	HOUSTON	5,751	Active
SPENCER ROAD PUD	HOUSTON	5,607	Active
HARRIS COUNTY MUD 239	HOUSTON	5,583	Active
NORTHWEST HARRIS COUNTY MUD 19	HOUSTON	5,535	Active
HARRIS COUNTY MUD 374 CYPRESS CREEK LAKE	HOUSTON	5,526	Active
HARRIS COUNTY MUD 163	HOUSTON	5,487	Active
HARRIS COUNTY MUD 5	HOUSTON	5,487	Active
HARRIS COUNTY MUD 502	HOUSTON	5,487	Active
HARRIS COUNTY MUD 148 KINGSLAKE	HOUSTON	5,448	Active
HARRIS COUNTY MUD 46	HOUSTON	5,418	Active
CHIMNEY HILL MUD	HOUSTON	5,409	Active
TATTOR ROAD MUD	HOUSTON	5,400	Active
BILMA PUD	HOUSTON	5,397	Active
HARRIS COUNTY MUD 86	HOUSTON	5,397	Active
ROLLING CREEK UTILITY DISTRICT	HOUSTON	5,388	Active
CITY OF NASSAU BAY	NASSAU BAY	5,347	Active
MOUNT HOUSTON ROAD MUD	HOUSTON	5,346	Active
WESTADOR MUD	HOUSTON	5,337	Active
CORNERSTONES MUD	HOUSTON	5,331	Active
MAYDE CREEK MUD	HOUSTON	5,301	Active
WEST HARRIS COUNTY MUD 7	HOUSTON	5,289	Active
FOREST COVE MUD	HOUSTON	5,268	Inactive
HARRIS COUNTY MUD 127	HOUSTON	5,247	Active
HARRIS COUNTY MUD 400 - WEST	HOUSTON	5,217	Active
WESTON MUD EAST	SUGAR LAND	5,184	Inactive
HARRIS COUNTY MUD 33	HOUSTON	5,181	Active
HARRIS COUNTY WCID 114	HOUSTON	5,160	Active
CROSBY MUD	CROSBY	5,130	Active
HARRIS COUNTY MUD 179	HOUSTON	5,115	Active
HARRIS COUNTY MUD 276	HOUSTON	5,094	Active
HARRIS COUNTY WCID 133	HOUSTON	5,082	Active
HARRIS COUNTY IMPROVEMENT DISTRICT 18	HOUSTON	5,025	Active
NORTHWEST HARRIS COUNTY MUD 32	HOUSTON	5,016	Active
HARRIS COUNTY MUD 495	HOUSTON	5,007	Active
NORTH GREEN MUD	HOUSTON	4,941	Active
RICEWOOD MUD	HOUSTON	4,908	Active
HARRIS COUNTY MUD 383	HOUSTON	4,881	Active
KLEINWOOD MUD	HOUSTON	4,872	Active
HARRIS COUNTY MUD 104	HOUSTON	4,854	Active

Showing the 200 largest of 970 systems on record, by population served. Browse by county above for the full list — every system has its own page, and all of them are in the sitemap.