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Harris County, California — public water systems

At a glance

12 active public water systems are filed under Harris County, California in EPA's SDWIS records, together reporting 2,852 people served. The largest is Westfield Garden Mobile Home Park, which reports serving 942 people. 5 are community water systems serving people where they live; the other 7 are non-community systems, such as schools, workplaces, campgrounds and gas stations with their own supply.

Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.

Active systems

12

Population served

2.9K

Community systems

5

Groundwater share

91.7%

How does Harris County compare with other California counties?

Harris County has the 58th-most active public water systems among the 201 counties listed for active California systems in EPA records; among the 72 with 3 or more systems, the median has 73. Its systems report 2,852 people served in total, the 61st-largest county figure in the state and less than 0.1% of the statewide total. The average system here reports serving 238 people, well below the California average of 5,706. Population figures are what each system reports; people served by more than one system, such as a wholesaler and the town that buys from it, are counted by each.

Where does Harris County's drinking water come from?

By primary water source, Harris County's active systems draw on groundwater (10, 83%), purchased groundwater (1, 8.3%) and purchased surface water (1, 8.3%). Overall, 92% rely mainly on groundwater (including purchased groundwater) and 8.3% on surface water, compared with 85% and 15% across California. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Westfield Garden Mobile Home Park, draws primarily on groundwater.

What kinds of water systems operate in Harris County?

Harris County's active systems break down as 5 community systems (42%), 3 non-transient non-community systems (25%) and 4 transient non-community systems (33%). A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. EPA lists their owner types as private (100%).

Water systems in Harris County

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Active public water systems in Harris County, California
#Water systemCountyPopulation servedTypeSource
1Westfield Garden Mobile Home ParkHarris942CommunityGroundwater
2Courtesy Mart 2Harris400Transient non-communityGroundwater
3R&K Weiman MHPHarris279CommunityGroundwater
4Dollar General Store 19496Harris250Transient non-communityGroundwater
5Longhorn Mobile Home CommunityHarris220CommunityPurchased groundwater
6Acorn Village Mobile Home ParkHarris192CommunityPurchased surface water
7Melrose MHPHarris186CommunityGroundwater
8Vine Apostolic ChurchHarris150Non-transient non-communityGroundwater
9Dollar General Huffman Fm 2100Harris150Transient non-communityGroundwater
10M S InternationalHarris33Non-transient non-communityGroundwater
11Louetta Automotive Store 9Harris25Transient non-communityGroundwater
12Hockley Data CenterHarris25Non-transient non-communityGroundwater

Harris County water systems: frequently asked questions

How many public water systems are in Harris County, California?

EPA's SDWIS records file 12 active public water systems under Harris County, California: 5 community systems (42%), 3 non-transient non-community systems (25%) and 4 transient non-community systems (33%).

Who supplies drinking water in Harris County, CA?

The largest community water systems filed under Harris County are Westfield Garden Mobile Home Park (942 people served), R&K Weiman MHP (279 people served) and Longhorn Mobile Home Community (220 people served). Which system serves a particular address depends on its service area, which EPA's SDWIS records do not include; a water bill or the local utility can confirm it.

Does Harris County's drinking water come from groundwater or surface water?

Of the 12 active public water systems in Harris County, 92% draw mainly on groundwater and 8.3% on surface water, counting purchased supplies. The largest system, Westfield Garden Mobile Home Park, uses groundwater.

Where can I find a water quality report for Harris County?

Each community water system must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1, covering the previous calendar year. 5 community systems are filed under Harris County, so the report to look for is the one from the system that supplies your address.

How can I check violations for a water system in Harris County?

Open the system's profile from the list on this page. Each profile shows the most recent Safe Drinking Water Act violations in EPA's records, with plain-English labels and whether each one is resolved. For current compliance status, EPA ECHO is the primary source.

More California water systems

About this data

Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.

Cite as: AquaCensus, “Public water systems in Harris County, California”, https://aquacensus.com/water-systems/california/harris (data as of October 1, 2026).