Public water system · CA3310301
ActiveMt San Jacinto St Park (Stone Creek)
At a glance
Mt San Jacinto St Park (Stone Creek) (PWSID CA3310301) is an active transient non-community water system in Riverside County, California. It reports serving 150 people through 160 service connections. Its primary water source is groundwater, and EPA lists it as owned by a state government. EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in January 2021.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
150
Service connections
160
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Mt San Jacinto St Park (Stone Creek) compare with other water systems in Riverside County?
By EPA's size categories, Mt San Jacinto St Park (Stone Creek) is a very small system (500 people or fewer). Riverside County has 197 active public water systems. Its population served is well below the county average of 14,435 people per system, and accounts for less than 0.1% of the 2,843,721 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 Mt San Jacinto St Park (Stone Creek) 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 Mt San Jacinto St Park (Stone Creek)?
EPA lists Mt San Jacinto St Park (Stone Creek) 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. 6 of the 197 active systems in Riverside County (3%) are also owned by a state government.
Does Mt San Jacinto St Park (Stone Creek) have drinking water violations?
EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in January 2021. The violations listed here began between October 1994 and January 2021. By type: 3 monitoring and reporting, 1 contaminant level above the legal limit and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Nitrate (2 of them). EPA lists 5 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 |
|---|---|---|---|---|
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2006-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2002-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2000-07-01 | Public notice, recordkeeping or otherOperations Report · code 10 | Not reported | No | Resolved |
| 1994-10-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 5 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.
Mt San Jacinto St Park (Stone Creek): frequently asked questions
Who runs Mt San Jacinto St Park (Stone Creek)?
Mt San Jacinto St Park (Stone Creek) (PWSID CA3310301) 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 Mt San Jacinto St Park (Stone Creek) serve?
Mt San Jacinto St Park (Stone Creek) reports serving 150 people through 160 service connections in Riverside County, California.
Where does Mt San Jacinto St Park (Stone Creek) 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 Mt San Jacinto St Park (Stone Creek) have any drinking water violations?
EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in January 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 Mt San Jacinto St Park (Stone Creek)'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 5 violations for this system; 1 is health-based, and the most recent began in January 2021. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Mt San Jacinto St Park (Stone Creek)'s water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Mt San Jacinto St Park (Stone Creek) 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 Riverside County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Eastern Municipal Wd | Riverside | 666,581 | Community | Purchased surface water |
| Riverside, City of | Riverside | 298,398 | Community | Groundwater under influence of surface water |
| Coachella Vwd: Cove Community | Riverside | 270,000 | Community | Groundwater |
| Elsinore Valley Mwd | Riverside | 169,455 | Community | Surface water |
| Corona, City of | Riverside | 168,575 | Community | Purchased surface water |
| Rancho California Water District | Riverside | 146,147 | Community | Purchased 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, “Mt San Jacinto St Park (Stone Creek), PWSID CA3310301, California”, https://aquacensus.com/water-systems/california/mt-san-jacinto-st-park-stone-creek-ca3310301 (data as of October 1, 2026).