Public water system · CA2110303
ActiveCsp - Tomales Bay St Park
At a glance
Csp - Tomales Bay St Park (PWSID CA2110303) is an active transient non-community water system in Marin County, California. It reports serving 503 people through 7 service connections. Its primary water source is groundwater, and EPA lists it as owned by a state government. EPA's records list one violation for this system; it is not health-based, and the most recent began in January 2007.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
503
Service connections
7
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Csp - Tomales Bay St Park compare with other water systems in Marin County?
By EPA's size categories, Csp - Tomales Bay St Park is a small system (501 to 3,300 people). Marin County has 46 active public water systems. Its population served is well below the county average of 6,203 people per system, and accounts for 0.2% of the 285,353 people reported by systems filed under the county. Across California, the 7,479 active systems average 5,706 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Csp - Tomales Bay St Park is about 3.5 times that figure.
What does “transient non-community water system” mean?
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. California has 3,016 active transient non-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 Csp - Tomales Bay St Park?
EPA lists Csp - Tomales Bay St Park as owned by a state 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. 6 of the 46 active systems in Marin County (13%) are also owned by a state government.
Does Csp - Tomales Bay St Park have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in January 2007. By type: 1 monitoring and reporting. The contaminant or rule involved is Nitrate. EPA lists 1 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 |
|---|---|---|---|---|
| 2007-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
The one violation in EPA's records.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.
Csp - Tomales Bay St Park: frequently asked questions
Who runs Csp - Tomales Bay St Park?
Csp - Tomales Bay St Park (PWSID CA2110303) is a transient non-community water system owned by a state government. It is regulated by the CA state drinking water program.
How many people does Csp - Tomales Bay St Park serve?
Csp - Tomales Bay St Park reports serving 503 people through 7 service connections in Marin County, California.
Where does Csp - Tomales Bay St Park 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 Csp - Tomales Bay St Park have any drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in January 2007. 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 Csp - Tomales Bay St Park'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 one violation for this system; it is not health-based, and the most recent began in January 2007. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Csp - Tomales Bay St Park's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Csp - Tomales Bay St Park is a 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 Marin County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Marin Municipal Water District | Marin | 186,895 | Community | Surface water |
| North Marin Water District | Marin | 61,691 | Community | Surface water |
| Nps Ggnra | Marin | 18,447 | Community | Purchased surface water |
| Bolinas Community PUD | Marin | 2,483 | Community | Surface water |
| North Marin Wd - Pt. Reyes | Marin | 1,841 | Community | Groundwater |
| Csp - Angel Island St Park | Marin | 1,622 | 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, “Csp - Tomales Bay St Park, PWSID CA2110303, California”, https://aquacensus.com/water-systems/california/csp-tomales-bay-st-park-ca2110303 (data as of October 1, 2026).