Public water system · CA3601135
ActiveArrowhead Regional Medical Center
At a glance
Arrowhead Regional Medical Center (PWSID CA3601135) is an active non-transient non-community water system in San Bernardino County, California. It reports serving 7,000 people through 1 service connection. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. EPA's records list 2 violations for this system; none is health-based, and the most recent began in December 2019.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
7,000
Service connections
1
Primary source
GWP
Purchased groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Arrowhead Regional Medical Center compare with other water systems in San Bernardino County?
By EPA's size categories, Arrowhead Regional Medical Center is a medium system (3,301 to 10,000 people). San Bernardino County has 306 active public water systems. Its population served is about 24% below the county average of 9,227 people per system, and accounts for 0.2% of the 2,823,318 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 Arrowhead Regional Medical Center is about 16 times 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. 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 Arrowhead Regional Medical Center?
EPA lists Arrowhead Regional Medical Center as owned by a local 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. 74 of the 306 active systems in San Bernardino County (24%) are also owned by a local government.
Does Arrowhead Regional Medical Center have drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in December 2019. The violations listed here began between November 2019 and December 2019. By type: 2 monitoring. The contaminant or rule involved most often is Revised Total Coliform Rule (2 of them). 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 |
|---|---|---|---|---|
| 2019-12-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2019-11-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | 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.
Arrowhead Regional Medical Center: frequently asked questions
Who runs Arrowhead Regional Medical Center?
Arrowhead Regional Medical Center (PWSID CA3601135) is a non-transient non-community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does Arrowhead Regional Medical Center serve?
Arrowhead Regional Medical Center reports serving 7,000 people through 1 service connection in San Bernardino County, California.
Where does Arrowhead Regional Medical Center 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 Arrowhead Regional Medical Center have any drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in December 2019. 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 Arrowhead Regional Medical Center'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 December 2019. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Arrowhead Regional Medical Center's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Arrowhead Regional Medical Center 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 San Bernardino County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| San Gabriel Valley Wc - Fontana | San Bernardino | 237,700 | Community | Surface water |
| San Bernardino City | San Bernardino | 214,665 | Community | Groundwater |
| Cucamonga Valley Water District | San Bernardino | 211,069 | Community | Surface water |
| Ontario Municipal Utilities Company | San Bernardino | 185,010 | Community | Purchased surface water |
| Victorville Water District | San Bernardino | 135,983 | Community | Purchased surface water |
| San Bernardino Valley Wd | San Bernardino | 109,608 | Community | Groundwater |
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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, “Arrowhead Regional Medical Center, PWSID CA3601135, California”, https://aquacensus.com/water-systems/california/arrowhead-regional-medical-center-ca3601135 (data as of October 1, 2026).