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Sierra County, California — public water systems

At a glance

32 active public water systems are filed under Sierra County, California in EPA's SDWIS records, together reporting 7,169 people served. The largest is Tnf-Logger & Stampede Rc, which reports serving 1,200 people. 8 are community water systems serving people where they live; the other 24 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

32

Population served

7.2K

Community systems

8

Groundwater share

93.8%

How does Sierra County compare with other California counties?

Sierra County has the 53rd-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 7,169 people served in total, the 59th-largest county figure in the state and less than 0.1% of the statewide total. The average system here reports serving 224 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 Sierra County's drinking water come from?

By primary water source, Sierra County's active systems draw on groundwater (30, 94%) and surface water (2, 6.3%). Overall, 94% rely mainly on groundwater (including purchased groundwater) and 6.3% 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, Tnf-Logger & Stampede Rc, draws primarily on groundwater.

What kinds of water systems operate in Sierra County?

Sierra County's active systems break down as 8 community systems (25%) and 24 transient non-community systems (75%). 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 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 (44%), federal government (34%), local government (19%) and state government (3.1%).

Water systems in Sierra County

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Active public water systems in Sierra County, California
#Water systemCountyPopulation servedTypeSource
1Tnf-Logger & Stampede RcSierra1,200Transient non-communityGroundwater
2City of LoyaltonSierra983CommunityGroundwater
3Downieville Public U.D.Sierra783CommunitySurface water
4Sierra Csa #5, Sierra BrooksSierra726CommunityGroundwater
5Sierra Water Resources - Sierra CitySierra324CommunityGroundwater
6Bassett'S StationSierra300Transient non-communityGroundwater
7Tnf-Aspen Creek/Pass CreekSierra300Transient non-communityGroundwater
8Sardine Lake ResortSierra250Transient non-communitySurface water
9Sierra City Water Works, Inc..Sierra250CommunityGroundwater
10Treasure Mountain CampSierra200Transient non-communityGroundwater
11Tnf-Cal-Ida WellSierra200Transient non-communityGroundwater
12Sierraville P.U.D.Sierra200CommunityGroundwater
13Sierra Co. W.W.D #1 CalpineSierra182CommunityGroundwater
14Shaffer S High Sierra CampSierra131Transient non-communityGroundwater
15Greene Acres Prop. O.A.Sierra129Transient non-communityGroundwater
16Tnf-Sardine Lake/Salmon CreekSierra100Transient non-communityGroundwater
17Tnf-Wild Plum CgSierra100Transient non-communityGroundwater
18Tnf-Indian Valley/Rocky Rest CgSierra95Transient non-communityGroundwater
19Tnf-Chapman CgSierra95Transient non-communityGroundwater
20Alleghany County W.D.Sierra82CommunityGroundwater
21Tnf-Cottonwood CgSierra75Transient non-communityGroundwater
22Tnf-Little Truckee WsSierra75Transient non-communityGroundwater
23Tnf-Loganville CgSierra70Transient non-communityGroundwater
24The YubaverseSierra58Transient non-communityGroundwater
25New Age Church of Being-Sierra Hot Spr.Sierra50Transient non-communityGroundwater
26Tnf-Union Flat CgSierra40Transient non-communityGroundwater
27Tnf-Yuba Pass CgSierra40Transient non-communityGroundwater
28Camp Leonard, Sierra Nv F.C.Sierra30Transient non-communityGroundwater
29Webber Lake CampgroundSierra26Transient non-communityGroundwater
30Sierra Pines ResortSierra25Transient non-communityGroundwater
31Pilot Lake CampSierra25Transient non-communityGroundwater
32Salmon Lake LodgeSierra25Transient non-communityGroundwater

Sierra County water systems: frequently asked questions

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

EPA's SDWIS records file 32 active public water systems under Sierra County, California: 8 community systems (25%) and 24 transient non-community systems (75%).

Who supplies drinking water in Sierra County, CA?

The largest community water systems filed under Sierra County are City of Loyalton (983 people served), Downieville Public U.D. (783 people served) and Sierra Csa #5, Sierra Brooks (726 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 Sierra County's drinking water come from groundwater or surface water?

Of the 32 active public water systems in Sierra County, 94% draw mainly on groundwater and 6.3% on surface water, counting purchased supplies. The largest system, Tnf-Logger & Stampede Rc, uses groundwater.

Where can I find a water quality report for Sierra 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. 8 community systems are filed under Sierra 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 Sierra 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 Sierra County, California”, https://aquacensus.com/water-systems/california/sierra (data as of October 1, 2026).