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Tulare County, California — public water systems

At a glance

274 active public water systems are filed under Tulare County, California in EPA's SDWIS records, together reporting 465,710 people served. The largest is Cws - Visalia, which reports serving 148,496 people. 92 are community water systems serving people where they live; the other 182 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

274

Population served

465.7K

Community systems

92

Groundwater share

92.7%

How does Tulare County compare with other California counties?

Tulare County has the 8th-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 465,710 people served in total, the 21st-largest county figure in the state and 1.1% of the statewide total. The average system here reports serving 1,700 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 Tulare County's drinking water come from?

By primary water source, Tulare County's active systems draw on groundwater (252, 92%), surface water (19, 6.9%), groundwater under influence of surface water (2, 0.7%) and purchased surface water (1, 0.4%). Overall, 93% rely mainly on groundwater (including purchased groundwater) and 7.3% 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, Cws - Visalia, draws primarily on groundwater.

What kinds of water systems operate in Tulare County?

Tulare County's active systems break down as 92 community systems (34%), 68 non-transient non-community systems (25%) and 114 transient non-community systems (42%). 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 (67%), local government (24%), federal government (6.6%) and state government (2.2%).

The 50 largest water systems in Tulare County

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Active public water systems in Tulare County, California
#Water systemCountyPopulation servedTypeSource
1Cws - VisaliaTulare148,496CommunityGroundwater
2Tulare, City ofTulare72,241CommunityGroundwater
3Porterville, City ofTulare63,487CommunityGroundwater
4Dinuba, City ofTulare27,281CommunityGroundwater
5Lindsay, City ofTulare12,659CommunitySurface water
6Exeter, City ofTulare11,169CommunityGroundwater
7Farmersville, City ofTulare10,243CommunityGroundwater
8Orosi Public Utility DistrictTulare8,300CommunityGroundwater
9Woodlake, City ofTulare7,846CommunityGroundwater
10Earlimart PUDTulare7,679CommunityGroundwater
11Cutler PUDTulare6,200CommunityGroundwater
12Ivanhoe Public Utility DistTulare4,580CommunityGroundwater
13Casillas Water SystemTulare3,000Transient non-communityGroundwater
14Nps-WolvertonTulare2,940CommunitySurface water
15Nps-Ash MountainTulare2,930CommunityGroundwater under influence of surface water
16Nps-Pinewood Water SystemTulare2,900Transient non-communityGroundwater
17Pixley Public Util DistTulare2,772CommunityGroundwater
18Strathmore Public Util DistTulare2,669CommunitySurface water
19Terra Bella Irrigation District - TbtTulare2,656CommunitySurface water
20Tipton Community Services DistTulare2,543CommunityGroundwater
21Poplar Comm Service DistTulare2,200CommunityGroundwater
22London Community Serv DistTulare2,134CommunityGroundwater
23Woodville Public Utility DistTulare1,740CommunityGroundwater
24Richgrove Community Services DistrictTulare1,617CommunityGroundwater
25Springville PUDTulare1,500CommunitySurface water
26Porterville Developmental CenterTulare1,281CommunityGroundwater
27Del Oro River Island Serv Terr #1Tulare1,280CommunitySurface water
28Bob Wiley Detention FacilityTulare1,130Non-transient non-communityGroundwater
29Caltrans Phillip S. Raine Sfty Rsra SbTulare1,000Transient non-communityGroundwater
30Arco Am Pm - PixleyTulare1,000Transient non-communityGroundwater
31Sultana Community Services DistrictTulare983CommunityGroundwater
32Caltrans Phillip S. Raine Sfty Rsra NbTulare980Transient non-communityGroundwater
33Del Oro California Pines DistrictTulare944CommunityGroundwater
34Sundale Union SchoolTulare930Non-transient non-communityGroundwater
35Nps-Dorst CgTulare900Transient non-communitySurface water
36Alpaugh Community Services DistrictTulare871CommunityGroundwater
37Liberty Elementary SchoolTulare818Non-transient non-communityGroundwater
38Jireh Packing Group - CutlerTulare770Non-transient non-communityGroundwater
39Cws - Tulco Water CompanyTulare716CommunityGroundwater
40Linnell Farm Labor CenterTulare694CommunityGroundwater
41Seville Water CompanyTulare691CommunityGroundwater
42Del Oro Traver DistrictTulare657CommunityGroundwater
43Woodville Farm Labor CenterTulare650CommunityGroundwater
44Oak Valley SchoolTulare645Non-transient non-communityGroundwater
45Plainview Mutual Water CompanyTulare617CommunityGroundwater
46Ducor CsdTulare616CommunityGroundwater
47North Kaweah Mutual Water CompanyTulare560CommunityGroundwater under influence of surface water
48Patterson Tract CsdTulare550CommunityGroundwater
49Allensworth CsdTulare531CommunityGroundwater
50Bartlett ParkTulare506Transient non-communityGroundwater

All other water systems in Tulare County (224)

The remaining active systems filed under Tulare County, largest first, with the population each reports serving.

Tulare County water systems: frequently asked questions

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

EPA's SDWIS records file 274 active public water systems under Tulare County, California: 92 community systems (34%), 68 non-transient non-community systems (25%) and 114 transient non-community systems (42%).

Who supplies drinking water in Tulare County, CA?

The largest community water systems filed under Tulare County are Cws - Visalia (148,496 people served), City of Tulare (72,241 people served) and City of Porterville (63,487 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 Tulare County's drinking water come from groundwater or surface water?

Of the 274 active public water systems in Tulare County, 93% draw mainly on groundwater and 7.3% on surface water, counting purchased supplies. The largest system, Cws - Visalia, uses groundwater.

Where can I find a water quality report for Tulare 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. 92 community systems are filed under Tulare 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 Tulare 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 Tulare County, California”, https://aquacensus.com/water-systems/california/tulare (data as of October 1, 2026).