Public water system · CA4901212
ActiveSonoma County Pub Works-Central Landfill
At a glance
Sonoma County Pub Works-Central Landfill (PWSID CA4901212) is an active non-transient non-community water system in Sonoma County, California. It reports serving 34 people through 20 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in July 2021.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
34
Service connections
20
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Sonoma County Pub Works-Central Landfill compare with other water systems in Sonoma County?
By EPA's size categories, Sonoma County Pub Works-Central Landfill is a very small system (500 people or fewer). Sonoma County has 441 active public water systems. Its population served is well below the county average of 1,092 people per system, and accounts for less than 0.1% of the 481,435 people reported by systems filed under the county. Across California, the 7,479 active systems average 5,706 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Sonoma County Pub Works-Central Landfill is well below that figure.
What does “non-transient non-community water system” mean?
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. California has 1,466 active non-transient non-community water systems, 20% 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 Sonoma County Pub Works-Central Landfill?
EPA lists Sonoma County Pub Works-Central Landfill 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. 58 of the 441 active systems in Sonoma County (13%) are also owned by a local government.
Does Sonoma County Pub Works-Central Landfill have drinking water violations?
EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in July 2021. The violations listed here began between January 2021 and July 2021. By type: 4 monitoring and reporting and 1 required treatment not met. The contaminant or rule involved most often is Lead and Copper Rule (5 of them). EPA lists 3 as addressed, 1 as resolved and 1 as archived. Addressed means the violation is not resolved or archived and is covered by formal enforcement. 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. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2021-07-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Addressed |
| 2021-07-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2021-01-01 | Required treatment not metPublic Education · code 65 | Lead and Copper Rulecode 5000 | Yes | Addressed |
| 2021-01-01 | Monitoring and reportingInitial, Follow-up, or Routine Source Water M/R · code 56 | Lead and Copper Rulecode 5000 | No | Addressed |
| 2021-01-01 | Monitoring and reportingWater Quality Parameter M/R · code 53 | Lead and Copper Rulecode 5000 | No | Archived |
All 5 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.
Sonoma County Pub Works-Central Landfill: frequently asked questions
Who runs Sonoma County Pub Works-Central Landfill?
Sonoma County Pub Works-Central Landfill (PWSID CA4901212) is a non-transient non-community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does Sonoma County Pub Works-Central Landfill serve?
Sonoma County Pub Works-Central Landfill reports serving 34 people through 20 service connections in Sonoma County, California.
Where does Sonoma County Pub Works-Central Landfill 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 Sonoma County Pub Works-Central Landfill have any drinking water violations?
EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in July 2021. 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 Sonoma County Pub Works-Central Landfill'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. EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in July 2021. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Sonoma County Pub Works-Central Landfill's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Sonoma County Pub Works-Central Landfill is a non-transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
Other water systems in Sonoma County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Santa Rosa, City of | Sonoma | 175,396 | Community | Groundwater |
| Petaluma, City of | Sonoma | 60,781 | Community | Groundwater |
| Rohnert Park, City of | Sonoma | 43,821 | Community | Groundwater |
| Windsor, Town of | Sonoma | 25,561 | Community | Groundwater |
| Valley of the Moon Water District | Sonoma | 23,107 | Community | Groundwater |
| Sonoma, City of | Sonoma | 11,725 | 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, “Sonoma County Pub Works-Central Landfill, PWSID CA4901212, California”, https://aquacensus.com/water-systems/california/sonoma-county-pub-works-central-landfill-ca4901212 (data as of October 1, 2026).