Public water system · CA3107329
ActiveAntelope Oaks Water System
At a glance
Antelope Oaks Water System (PWSID CA3107329) is an active non-transient non-community water system in Placer County, California. It reports serving 100 people through 2 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 3 violations for this system; none is health-based, and the most recent began in December 2021.
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 Antelope Oaks Water System compare with other water systems in Placer County?
By EPA's size categories, Antelope Oaks Water System is a very small system (500 people or fewer). Placer County has 116 active public water systems. Its population served is well below the county average of 3,692 people per system, and accounts for less than 0.1% of the 428,242 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 Antelope Oaks Water System 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 Antelope Oaks Water System?
EPA lists Antelope Oaks Water System 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. 78 of the 116 active systems in Placer County (67%) are also privately owned.
Does Antelope Oaks Water System have drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in December 2021. The violations listed here began between September 2017 and December 2021. By type: 2 monitoring and 1 monitoring and reporting. 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 |
|---|---|---|---|---|
| 2021-12-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2017-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2017-09-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | 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.
Antelope Oaks Water System: frequently asked questions
Who runs Antelope Oaks Water System?
Antelope Oaks Water System (PWSID CA3107329) is a non-transient non-community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Antelope Oaks Water System serve?
Antelope Oaks Water System reports serving 100 people through 2 service connections in Placer County, California.
Where does Antelope Oaks Water System 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 Antelope Oaks Water System have any drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in December 2021. 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 Antelope Oaks Water System'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; none is health-based, and the most recent began in December 2021. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Antelope Oaks Water System's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Antelope Oaks Water System 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 Placer County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Roseville | Placer | 155,612 | Community | Surface water |
| Placer Cwa - Foothill | Placer | 89,544 | Community | Surface water |
| City of Lincoln | Placer | 54,538 | Community | Purchased surface water |
| Placer Cwa - Auburn/Bowman | Placer | 27,294 | Community | Surface water |
| Northstar C.S.D. | Placer | 15,452 | Community | Surface water |
| Cal Am - West Placer | Placer | 8,861 | Community | Purchased surface water |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Antelope Oaks Water System, PWSID CA3107329, California”, https://aquacensus.com/water-systems/california/antelope-oaks-water-system-ca3107329 (data as of October 1, 2026).