Public water system · CA4110029
ActiveButano State Park - Csp
At a glance
Butano State Park - Csp (PWSID CA4110029) is an active transient non-community water system in San Mateo County, California. It reports serving 121 people through 4 service connections. Its primary water source is surface water, and EPA lists it as owned by a state government. EPA's records list 5 violations for this system; 3 are health-based, and the most recent began in September 2020.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
121
Service connections
4
Primary source
SW
Surface water
System type
TNCWS
Transient non-community water system
System record
How does Butano State Park - Csp compare with other water systems in San Mateo County?
By EPA's size categories, Butano State Park - Csp is a very small system (500 people or fewer). San Mateo County has 51 active public water systems. Its population served is well below the county average of 15,363 people per system, and accounts for less than 0.1% of the 783,522 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 Butano State Park - Csp is about 16% below 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. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 609 California systems (8.1%) list surface water as their primary source.
Who owns and regulates Butano State Park - Csp?
EPA lists Butano State Park - Csp 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. 5 of the 51 active systems in San Mateo County (9.8%) are also owned by a state government.
Does Butano State Park - Csp have drinking water violations?
EPA's records list 5 violations for this system; 3 are health-based, and the most recent began in September 2020. The violations listed here began between September 1996 and September 2020. By type: 2 required treatment not met, 1 monitoring, 1 contaminant level above the legal limit and 1 monitoring and reporting. The contaminant or rule involved most often is Surface Water Treatment Rule (2 of them). EPA lists 5 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 |
|---|---|---|---|---|
| 2020-09-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2011-03-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 2011-02-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2008-09-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1996-09-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
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.
Butano State Park - Csp: frequently asked questions
Who runs Butano State Park - Csp?
Butano State Park - Csp (PWSID CA4110029) 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 Butano State Park - Csp serve?
Butano State Park - Csp reports serving 121 people through 4 service connections in San Mateo County, California.
Where does Butano State Park - Csp get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does Butano State Park - Csp have any drinking water violations?
EPA's records list 5 violations for this system; 3 are health-based, and the most recent began in September 2020. 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 Butano State Park - Csp'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; 3 are health-based, and the most recent began in September 2020. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Butano State Park - Csp's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Butano State Park - Csp 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 San Mateo County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Daly City | San Mateo | 104,901 | Community | Purchased surface water |
| California Water Service - San Mateo | San Mateo | 102,348 | Community | Purchased surface water |
| City of Redwood City | San Mateo | 92,819 | Community | Purchased surface water |
| California Water Service-S San Francisco | San Mateo | 64,146 | Community | Purchased surface water |
| California Water Service - Bear Gulch | San Mateo | 61,431 | Community | Surface water |
| City of San Bruno | San Mateo | 42,631 | Community | Purchased surface water |
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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, “Butano State Park - Csp, PWSID CA4110029, California”, https://aquacensus.com/water-systems/california/butano-state-park-csp-ca4110029 (data as of October 1, 2026).