Public water system · CA3200104
ActiveGrizzly Lake Csd-Delleker
At a glance
Grizzly Lake Csd-Delleker (PWSID CA3200104) is an active community water system in Plumas County, California. It reports serving 1,314 people through 351 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 9 are health-based, and the most recent began in October 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,314
Service connections
351
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Grizzly Lake Csd-Delleker compare with other water systems in Plumas County?
By EPA's size categories, Grizzly Lake Csd-Delleker is a small system (501 to 3,300 people). Plumas County has 108 active public water systems. Its population served is about 4.3 times the county average of 303 people per system, and accounts for 4% of the 32,740 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 Grizzly Lake Csd-Delleker 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 Grizzly Lake Csd-Delleker?
EPA lists Grizzly Lake Csd-Delleker as owned by a local government. 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. 19 of the 108 active systems in Plumas County (18%) are also owned by a local government.
Does Grizzly Lake Csd-Delleker have drinking water violations?
Of the 12 most recent violations in EPA's records, 9 are health-based, and the most recent began in October 2024. The violations listed here began between April 2020 and October 2024. By type: 9 contaminant level above the legal limit and 3 monitoring. The contaminant or rule involved most often is Combined Uranium (9 of them). EPA lists 9 as archived and 3 as resolved. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status. 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 |
|---|---|---|---|---|
| 2024-10-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2024-09-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2023-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Combined Uraniumcode 4006 | Yes | Archived |
| 2022-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Combined Uraniumcode 4006 | Yes | Archived |
| 2021-12-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2021-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Combined Uraniumcode 4006 | Yes | Archived |
| 2021-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Combined Uraniumcode 4006 | Yes | Archived |
| 2021-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Combined Uraniumcode 4006 | Yes | Archived |
| 2021-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Combined Uraniumcode 4006 | Yes | Archived |
| 2020-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Combined Uraniumcode 4006 | Yes | Archived |
| 2020-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Combined Uraniumcode 4006 | Yes | Archived |
| 2020-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Combined Uraniumcode 4006 | Yes | Archived |
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.
Grizzly Lake Csd-Delleker: frequently asked questions
Who runs Grizzly Lake Csd-Delleker?
Grizzly Lake Csd-Delleker (PWSID CA3200104) is a community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does Grizzly Lake Csd-Delleker serve?
Grizzly Lake Csd-Delleker reports serving 1,314 people through 351 service connections in Plumas County, California.
Where does Grizzly Lake Csd-Delleker 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 Grizzly Lake Csd-Delleker have any drinking water violations?
Of the 12 most recent violations in EPA's records, 9 are health-based, and the most recent began in October 2024. 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 Grizzly Lake Csd-Delleker'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, 9 are health-based, and the most recent began in October 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Grizzly Lake Csd-Delleker's water quality report?
As a community water system, Grizzly Lake Csd-Delleker 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 Plumas County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Lake Almanor Country Club Mwc | Plumas | 6,000 | Community | Groundwater |
| American Valley Csd | Plumas | 3,778 | Community | Groundwater |
| Chester Public U.D. | Plumas | 2,187 | Community | Groundwater |
| City of Portola | Plumas | 2,100 | Community | Purchased surface water |
| Hamilton Branch Csd | Plumas | 1,874 | Community | Groundwater |
| Plumas Eureka Csd | Plumas | 1,534 | 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, “Grizzly Lake Csd-Delleker, PWSID CA3200104, California”, https://aquacensus.com/water-systems/california/grizzly-lake-csd-delleker-ca3200104 (data as of October 1, 2026).