Public water system · CA0500097
ActiveCusd District Office
At a glance
Cusd District Office (PWSID CA0500097) is an active non-transient non-community water system in Calaveras County, California. It reports serving 100 people through 2 service connections. Its primary water source is groundwater, and EPA lists it as owned by a state government. EPA's records list 10 violations for this system; 2 are health-based, and the most recent began in September 2015.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
100
Service connections
2
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Cusd District Office compare with other water systems in Calaveras County?
By EPA's size categories, Cusd District Office is a very small system (500 people or fewer). Calaveras County has 51 active public water systems. Its population served is well below the county average of 1,102 people per system, and accounts for 0.2% of the 56,208 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 Cusd District Office 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 Cusd District Office?
EPA lists Cusd District Office 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. 2 of the 51 active systems in Calaveras County (3.9%) are also owned by a state government.
Does Cusd District Office have drinking water violations?
EPA's records list 10 violations for this system; 2 are health-based, and the most recent began in September 2015. The violations listed here began between January 2005 and September 2015. By type: 8 monitoring and reporting and 2 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (9 of them). EPA lists 10 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 |
|---|---|---|---|---|
| 2015-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2013-08-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2011-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2011-07-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2011-06-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2011-05-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2007-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2006-12-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2006-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2005-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 10 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.
Cusd District Office: frequently asked questions
Who runs Cusd District Office?
Cusd District Office (PWSID CA0500097) is a non-transient non-community water system owned by a state government. It is regulated by the CA state drinking water program.
How many people does Cusd District Office serve?
Cusd District Office reports serving 100 people through 2 service connections in Calaveras County, California.
Where does Cusd District Office 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 Cusd District Office have any drinking water violations?
EPA's records list 10 violations for this system; 2 are health-based, and the most recent began in September 2015. 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 Cusd District Office'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 10 violations for this system; 2 are health-based, and the most recent began in September 2015. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Cusd District Office's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Cusd District Office 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 Calaveras County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Ccwd - Ebbetts Pass | Calaveras | 11,545 | Community | Surface water |
| Ccwd - Jenny Lind | Calaveras | 9,861 | Community | Surface water |
| Calaveras PUD | Calaveras | 6,286 | Community | Surface water |
| Ccwd - Copper Cove | Calaveras | 5,187 | Community | Surface water |
| Blue Lake Springs Mut Wtr | Calaveras | 4,841 | Community | Purchased surface water |
| Union Public Utility District | Calaveras | 4,774 | 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, “Cusd District Office, PWSID CA0500097, California”, https://aquacensus.com/water-systems/california/cusd-district-office-ca0500097 (data as of October 1, 2026).