Public water system · CA4600017
ActiveSierra Water Resources - Sierra City
At a glance
Sierra Water Resources - Sierra City (PWSID CA4600017) is an active community water system in Sierra County, California. It reports serving 324 people through 120 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in August 2017.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
324
Service connections
120
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Sierra Water Resources - Sierra City compare with other water systems in Sierra County?
By EPA's size categories, Sierra Water Resources - Sierra City is a very small system (500 people or fewer). Sierra County has 32 active public water systems, and Sierra Water Resources - Sierra City is the 5th-largest of them by population served. Its population served is about 45% above the county average of 224 people per system, and accounts for 4.5% of the 7,169 people reported by systems filed under the county. Across California, the 7,479 active systems average 5,706 people each. Nationally, the average active community water system reports serving 6,703 people, so Sierra Water Resources - Sierra City is well below that figure.
What does “community water system” mean?
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. California has 2,997 active community water systems, 40% of the state's 7,479 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 6,179 California systems (83%) list groundwater as their primary source.
Who owns and regulates Sierra Water Resources - Sierra City?
EPA lists Sierra Water Resources - Sierra City as privately owned. The CA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 14 of the 32 active systems in Sierra County (44%) are also privately owned.
Does Sierra Water Resources - Sierra City have drinking water violations?
Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in August 2017. The violations listed here began between September 2011 and August 2017. By type: 6 monitoring and reporting, 3 contaminant level above the legal limit, 2 public notice, recordkeeping or other and 1 monitoring. The contaminant or rule involved most often is Total coliform bacteria (TCR) (9 of them). EPA lists 12 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2017-08-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2016-06-03 | Public notice, recordkeeping or otherVariance/Exemption/Other Compliance · code 08 | Not reported | No | Resolved |
| 2015-11-01 | Public notice, recordkeeping or otherVariance/Exemption/Other Compliance · code 08 | Not reported | No | Resolved |
| 2015-10-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2015-09-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2015-08-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2015-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2015-02-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2015-01-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2014-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2014-03-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2011-09-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Sierra Water Resources - Sierra City: frequently asked questions
Who runs Sierra Water Resources - Sierra City?
Sierra Water Resources - Sierra City (PWSID CA4600017) is a community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Sierra Water Resources - Sierra City serve?
Sierra Water Resources - Sierra City reports serving 324 people through 120 service connections in Sierra County, California.
Where does Sierra Water Resources - Sierra City get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Sierra Water Resources - Sierra City have any drinking water violations?
Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in August 2017. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Sierra Water Resources - Sierra City's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in August 2017. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Sierra Water Resources - Sierra City's water quality report?
As a community water system, Sierra Water Resources - Sierra City must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Sierra County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Tnf-Logger & Stampede Rc | Sierra | 1,200 | Transient non-community | Groundwater |
| City of Loyalton | Sierra | 983 | Community | Groundwater |
| Downieville Public U.D. | Sierra | 783 | Community | Surface water |
| Sierra Csa #5, Sierra Brooks | Sierra | 726 | Community | Groundwater |
| Tnf-Aspen Creek/Pass Creek | Sierra | 300 | Transient non-community | Groundwater |
| Bassett'S Station | Sierra | 300 | Transient non-community | Groundwater |
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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, “Sierra Water Resources - Sierra City, PWSID CA4600017, California”, https://aquacensus.com/water-systems/california/sierra-water-resources-sierra-city-ca4600017 (data as of October 1, 2026).