Public water system · CA2210907
ActiveMcusd - Sierra Foothill Charter School
At a glance
Mcusd - Sierra Foothill Charter School (PWSID CA2210907) is an active non-transient non-community water system in Mariposa County, California. It reports serving 157 people through 9 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in November 2020.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
157
Service connections
9
Primary source
SWP
Purchased surface water
System type
NTNCWS
Non-transient non-community water system
System record
How does Mcusd - Sierra Foothill Charter School compare with other water systems in Mariposa County?
By EPA's size categories, Mcusd - Sierra Foothill Charter School is a very small system (500 people or fewer). Mariposa County has 67 active public water systems. Its population served is about 59% below the county average of 381 people per system, and accounts for 0.6% of the 25,508 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 Mcusd - Sierra Foothill Charter School is about 63% 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. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 506 California systems (6.8%) list purchased surface water as their primary source.
Who owns and regulates Mcusd - Sierra Foothill Charter School?
EPA lists Mcusd - Sierra Foothill Charter School 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. 21 of the 67 active systems in Mariposa County (31%) are also owned by a local government.
Does Mcusd - Sierra Foothill Charter School have drinking water violations?
EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in November 2020. The violations listed here began between June 2016 and November 2020. By type: 2 monitoring and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Revised Total Coliform Rule (2 of them). EPA lists 3 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 |
|---|---|---|---|---|
| 2020-11-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2020-10-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2016-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Nitratecode 1040 | Yes | Resolved |
All 3 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.
Mcusd - Sierra Foothill Charter School: frequently asked questions
Who runs Mcusd - Sierra Foothill Charter School?
Mcusd - Sierra Foothill Charter School (PWSID CA2210907) 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 Mcusd - Sierra Foothill Charter School serve?
Mcusd - Sierra Foothill Charter School reports serving 157 people through 9 service connections in Mariposa County, California.
Where does Mcusd - Sierra Foothill Charter School get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Mcusd - Sierra Foothill Charter School have any drinking water violations?
EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in November 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 Mcusd - Sierra Foothill Charter School'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 3 violations for this system; 1 is health-based, and the most recent began in November 2020. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Mcusd - Sierra Foothill Charter School's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Mcusd - Sierra Foothill Charter School 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 Mariposa County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Yosemite Nps-Glacier Point | Mariposa | 4,000 | Transient non-community | Surface water |
| Blm-Briceburg Water System | Mariposa | 3,196 | Transient non-community | Groundwater |
| Mariposa Public Utility Dist | Mariposa | 2,000 | Community | Surface water |
| Yosemite Nps-Bridalveil Fall | Mariposa | 1,163 | Transient non-community | Groundwater |
| Mid - Mc Swain Rec Area | Mariposa | 1,119 | Transient non-community | Surface water |
| Yosemite Nps-Yosemite Valley | Mariposa | 1,000 | 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, “Mcusd - Sierra Foothill Charter School, PWSID CA2210907, California”, https://aquacensus.com/water-systems/california/mcusd-sierra-foothill-charter-school-ca2210907 (data as of October 1, 2026).