Public water system · CA3310502
ActiveJoshua Tree Np - Black Rock Canyon
At a glance
Joshua Tree Np - Black Rock Canyon (PWSID CA3310502) is an active transient non-community water system in Riverside County, California. It reports serving 407 people through 8 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by the federal government. EPA's records list 2 violations for this system; none is health-based, and the most recent began in August 2022.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
407
Service connections
8
Primary source
GWP
Purchased groundwater
System type
TNCWS
Transient non-community water system
System record
How does Joshua Tree Np - Black Rock Canyon compare with other water systems in Riverside County?
By EPA's size categories, Joshua Tree Np - Black Rock Canyon 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 Joshua Tree Np - Black Rock Canyon is about 183% above 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. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own. 76 California systems (1%) list purchased groundwater as their primary source.
Who owns and regulates Joshua Tree Np - Black Rock Canyon?
EPA lists Joshua Tree Np - Black Rock Canyon as owned by the federal 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. 11 of the 197 active systems in Riverside County (5.6%) are also owned by the federal government.
Does Joshua Tree Np - Black Rock Canyon have drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in August 2022. The violations listed here began between February 2002 and August 2022. By type: 1 public notice, recordkeeping or other and 1 monitoring and reporting. The contaminants or rules involved are Groundwater Rule and Total coliform bacteria (TCR). EPA lists 2 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 |
|---|---|---|---|---|
| 2022-08-07 | Public notice, recordkeeping or otherFailure to Notify Other PWS · code 73 | Groundwater Rulecode 0700 | No | Resolved |
| 2002-02-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 2 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.
Joshua Tree Np - Black Rock Canyon: frequently asked questions
Who runs Joshua Tree Np - Black Rock Canyon?
Joshua Tree Np - Black Rock Canyon (PWSID CA3310502) is a transient non-community water system owned by the federal government. It is regulated by the CA state drinking water program.
How many people does Joshua Tree Np - Black Rock Canyon serve?
Joshua Tree Np - Black Rock Canyon reports serving 407 people through 8 service connections in Riverside County, California.
Where does Joshua Tree Np - Black Rock Canyon get its water?
EPA SDWIS lists this system's primary water source as purchased groundwater. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own.
Does Joshua Tree Np - Black Rock Canyon have any drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in August 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 Joshua Tree Np - Black Rock Canyon'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 2 violations for this system; none is health-based, and the most recent began in August 2022. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Joshua Tree Np - Black Rock Canyon's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Joshua Tree Np - Black Rock Canyon 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 |
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, “Joshua Tree Np - Black Rock Canyon, PWSID CA3310502, California”, https://aquacensus.com/water-systems/california/joshua-tree-np-black-rock-canyon-ca3310502 (data as of October 1, 2026).