Public water system · CA0202501
ActiveDiamond Valley School
At a glance
Diamond Valley School (PWSID CA0202501) is an active non-transient non-community water system in Alpine County, California. It reports serving 100 people through 5 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list one violation for this system; it is not health-based, and the most recent began in October 2017.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
100
Service connections
5
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Diamond Valley School compare with other water systems in Alpine County?
By EPA's size categories, Diamond Valley School is a very small system (500 people or fewer). Alpine County has 35 active public water systems. Its population served is well below the county average of 419 people per system, and accounts for 0.7% of the 14,677 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 Diamond Valley School 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 Diamond Valley School?
EPA lists Diamond Valley School as privately owned. 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. 20 of the 35 active systems in Alpine County (57%) are also privately owned.
Does Diamond Valley School have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in October 2017. By type: 1 monitoring and reporting. The contaminant or rule involved is Lead and Copper Rule. 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 |
|---|---|---|---|---|
| 2017-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | 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.
Diamond Valley School: frequently asked questions
Who runs Diamond Valley School?
Diamond Valley School (PWSID CA0202501) is a non-transient non-community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Diamond Valley School serve?
Diamond Valley School reports serving 100 people through 5 service connections in Alpine County, California.
Where does Diamond Valley School 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 Diamond Valley School 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 October 2017. 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 Diamond Valley 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 one violation for this system; it is not health-based, and the most recent began in October 2017. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Diamond Valley School's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Diamond Valley 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 Alpine County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Kirkwood Meadows Public Utility District | Alpine | 7,851 | Community | Groundwater |
| Bear Valley Mountain Resort | Alpine | 3,500 | Transient non-community | Groundwater |
| Ca State Parks - Grover Hot Springs | Alpine | 1,002 | Transient non-community | Surface water |
| Lake Alpine Water Company | Alpine | 625 | Community | Surface water |
| Kirkwood Sunrise Grill | Alpine | 500 | Transient non-community | Groundwater |
| Markleeville Water Co. | Alpine | 175 | Community | 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, “Diamond Valley School, PWSID CA0202501, California”, https://aquacensus.com/water-systems/california/diamond-valley-school-ca0202501 (data as of October 1, 2026).