Skip to content
AquaCensus

Plumas County, California — public water systems

At a glance

108 active public water systems are filed under Plumas County, California in EPA's SDWIS records, together reporting 32,740 people served. The largest is Lake Almanor Country Club Mwc, which reports serving 6,000 people. 27 are community water systems serving people where they live; the other 81 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

108

Population served

32.7K

Community systems

27

Groundwater share

95.4%

How does Plumas County compare with other California counties?

Plumas County has the 26th-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 32,740 people served in total, the 52nd-largest county figure in the state and less than 0.1% of the statewide total. The average system here reports serving 303 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 Plumas County's drinking water come from?

By primary water source, Plumas County's active systems draw on groundwater (103, 95%), surface water (4, 3.7%) and purchased surface water (1, 0.9%). Overall, 95% rely mainly on groundwater (including purchased groundwater) and 4.6% 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, Lake Almanor Country Club Mwc, draws primarily on groundwater.

What kinds of water systems operate in Plumas County?

Plumas County's active systems break down as 27 community systems (25%), 6 non-transient non-community systems (5.6%) and 75 transient non-community systems (69%). 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 (59%), federal government (19%), local government (18%) and state government (4.6%).

The 50 largest water systems in Plumas County

🔒 Create a free account to export CSV
Active public water systems in Plumas County, California
#Water systemCountyPopulation servedTypeSource
1Lake Almanor Country Club MwcPlumas6,000CommunityGroundwater
2American Valley CsdPlumas3,778CommunityGroundwater
3Chester Public U.D.Plumas2,187CommunityGroundwater
4City of PortolaPlumas2,100CommunityPurchased surface water
5Hamilton Branch CsdPlumas1,874CommunityGroundwater
6Plumas Eureka CsdPlumas1,534CommunityGroundwater
7West Almanor M.W.C.Plumas1,394CommunityGroundwater
8Grizzly Lake Csd-DellekerPlumas1,314CommunityGroundwater
9Plumas-Eureka S.P.Plumas800Transient non-communityGroundwater
10Whitehawk Ranch MwcPlumas765CommunitySurface water
11Feather River Rv & MHPPlumas741CommunityGroundwater
12Graeagle Water CompanyPlumas737CommunitySurface water
13Ivcsd-GreenvillePlumas630CommunityGroundwater
14Feather River Community CollegePlumas600Non-transient non-communityGroundwater
15Caltrans-Massack Rest StopPlumas350Transient non-communityGroundwater
16Pg&E Rocky Point CgPlumas312Transient non-communityGroundwater
17Sierra Pacific Industries QuincyPlumas300Non-transient non-communityGroundwater
18Oakland Feather River CampPlumas300Transient non-communityGroundwater
19Grizzly Creek Ranch SnjPlumas300Non-transient non-communityGroundwater
20Greenhorn Creek CsdPlumas280CommunityGroundwater
21Ivcsd Crescent MillsPlumas258CommunityGroundwater
22Lower Bucks Lake LDS CampPlumas220Transient non-communityGroundwater
23Grizzly Lake Csd-Crocker/WelchPlumas215CommunityGroundwater
24Bucks Lakeshore ResortPlumas200Transient non-communityGroundwater
25Blairsden Water Users AssnPlumas200CommunityGroundwater
26Waltons Grizzly LodgePlumas200Transient non-communityGroundwater
27Caltrans-L.T. Davis ReststopPlumas200Transient non-communityGroundwater
28Associations of Thompson LakePlumas182Transient non-communitySurface water
29Pg&E Ponderosa Flat CgPlumas150Transient non-communityGroundwater
30Two Rivers Sport CampPlumas150Transient non-communityGroundwater
31Coppercreek CampgroundPlumas150Transient non-communityGroundwater
32Walker Ranch CsdPlumas150CommunityGroundwater
33Clio Rivers Edge Rv ParkPlumas150Transient non-communityGroundwater
34Pg&E Haskins Valley CgPlumas150Transient non-communityGroundwater
35Gold Mountain CsdPlumas135CommunityGroundwater
36Caltrans-Chester Safety Rest StopPlumas120Transient non-communityGroundwater
37Pnf Kenzie Ravine 1 & 2Plumas120Transient non-communityGroundwater
38Lake Cove ResortPlumas120Transient non-communityGroundwater
39Grizzly Ranch CsdPlumas102CommunityGroundwater
40North Shore CgPlumas100Transient non-communityGroundwater
41Plumas Pines ResortPlumas100Transient non-communityGroundwater
42Uc Berkeley Forestry CampPlumas100Transient non-communityGroundwater
43Pnf Mt Hough Ranger StationPlumas100Non-transient non-communityGroundwater
44Brewing LairPlumas100Transient non-communityGroundwater
45Pnf Grasshopper / Grizzly CgsPlumas100Transient non-communityGroundwater
46Little Bear Rv ParkPlumas100Transient non-communityGroundwater
47Camp TimberwolfPlumas90Transient non-communityGroundwater
48Pnf Lighting Tree CgPlumas90Transient non-communityGroundwater
49Pnf Big Cove CgPlumas80Transient non-communityGroundwater
50Clio Public Utility DistrictPlumas79CommunityGroundwater

All other water systems in Plumas County (58)

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

Plumas County water systems: frequently asked questions

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

EPA's SDWIS records file 108 active public water systems under Plumas County, California: 27 community systems (25%), 6 non-transient non-community systems (5.6%) and 75 transient non-community systems (69%).

Who supplies drinking water in Plumas County, CA?

The largest community water systems filed under Plumas County are Lake Almanor Country Club Mwc (6,000 people served), American Valley Csd (3,778 people served) and Chester Public U.D. (2,187 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 Plumas County's drinking water come from groundwater or surface water?

Of the 108 active public water systems in Plumas County, 95% draw mainly on groundwater and 4.6% on surface water, counting purchased supplies. The largest system, Lake Almanor Country Club Mwc, uses groundwater.

Where can I find a water quality report for Plumas 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. 27 community systems are filed under Plumas 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 Plumas 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 Plumas County, California”, https://aquacensus.com/water-systems/california/plumas (data as of October 1, 2026).