Public water system · CA3710316
ActivePalomar Mtn. Sp - Doane Valley
At a glance
Palomar Mtn. Sp - Doane Valley (PWSID CA3710316) is an active transient non-community water system in San Diego County, California. It reports serving 131 people through 16 service connections. Its primary water source is groundwater, and EPA lists it as owned by a state government. EPA's records list 6 violations for this system; 1 is health-based, and the most recent began in November 2022.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
131
Service connections
16
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Palomar Mtn. Sp - Doane Valley compare with other water systems in San Diego County?
By EPA's size categories, Palomar Mtn. Sp - Doane Valley is a very small system (500 people or fewer). San Diego County has 191 active public water systems. Its population served is well below the county average of 19,427 people per system, and accounts for less than 0.1% of the 3,710,459 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 Palomar Mtn. Sp - Doane Valley is roughly in line with 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. 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 Palomar Mtn. Sp - Doane Valley?
EPA lists Palomar Mtn. Sp - Doane Valley 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. 16 of the 191 active systems in San Diego County (8.4%) are also owned by a state government.
Does Palomar Mtn. Sp - Doane Valley have drinking water violations?
EPA's records list 6 violations for this system; 1 is health-based, and the most recent began in November 2022. The violations listed here began between April 1995 and November 2022. By type: 3 monitoring and reporting, 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 6 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 |
|---|---|---|---|---|
| 2022-11-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2022-07-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2001-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitritecode 1041 | No | Resolved |
| 2000-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1995-04-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1995-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 6 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.
Palomar Mtn. Sp - Doane Valley: frequently asked questions
Who runs Palomar Mtn. Sp - Doane Valley?
Palomar Mtn. Sp - Doane Valley (PWSID CA3710316) 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 Palomar Mtn. Sp - Doane Valley serve?
Palomar Mtn. Sp - Doane Valley reports serving 131 people through 16 service connections in San Diego County, California.
Where does Palomar Mtn. Sp - Doane Valley 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 Palomar Mtn. Sp - Doane Valley have any drinking water violations?
EPA's records list 6 violations for this system; 1 is health-based, and the most recent began in November 2022. 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 Palomar Mtn. Sp - Doane Valley'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 6 violations for this system; 1 is health-based, and the most recent began in November 2022. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Palomar Mtn. Sp - Doane Valley's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Palomar Mtn. Sp - Doane Valley 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 Diego County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| San Diego, City of | San Diego | 1,385,379 | Community | Surface water |
| Helix Water District | San Diego | 277,668 | Community | Surface water |
| Otay Water District | San Diego | 238,008 | Community | Purchased surface water |
| Sweetwater Authority | San Diego | 191,282 | Community | Surface water |
| Oceanside, City of | San Diego | 171,483 | Community | Purchased surface water |
| Escondido, City of | San Diego | 137,044 | 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, “Palomar Mtn. Sp - Doane Valley, PWSID CA3710316, California”, https://aquacensus.com/water-systems/california/palomar-mtn-sp-doane-valley-ca3710316 (data as of October 1, 2026).