Public water system · CA3600220
ActiveCsa 42 Oro Grande
At a glance
Csa 42 Oro Grande (PWSID CA3600220) is an active community water system in San Bernardino County, California. It reports serving 529 people through 143 service connections. Its primary water source is 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 October 1981.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
529
Service connections
143
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Csa 42 Oro Grande compare with other water systems in San Bernardino County?
By EPA's size categories, Csa 42 Oro Grande is a small system (501 to 3,300 people). San Bernardino County has 306 active public water systems. Its population served is well below the county average of 9,227 people per system, and accounts for less than 0.1% 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 community water system reports serving 6,703 people, so Csa 42 Oro Grande is well below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. California has 2,997 active 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 Csa 42 Oro Grande?
EPA lists Csa 42 Oro Grande 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 Csa 42 Oro Grande have drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in October 1981. The violations listed here began between October 1980 and October 1981. By type: 2 monitoring and reporting. The contaminant or rule involved most often is Gross alpha (excluding radon and uranium) (2 of them). EPA lists 2 as archived. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 1981-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
| 1980-10-30 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
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.
Csa 42 Oro Grande: frequently asked questions
Who runs Csa 42 Oro Grande?
Csa 42 Oro Grande (PWSID CA3600220) is a community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does Csa 42 Oro Grande serve?
Csa 42 Oro Grande reports serving 529 people through 143 service connections in San Bernardino County, California.
Where does Csa 42 Oro Grande 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 Csa 42 Oro Grande have any drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in October 1981. 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 Csa 42 Oro Grande'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 October 1981. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Csa 42 Oro Grande's water quality report?
As a community water system, Csa 42 Oro Grande must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
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, “Csa 42 Oro Grande, PWSID CA3600220, California”, https://aquacensus.com/water-systems/california/csa-42-oro-grande-ca3600220 (data as of October 1, 2026).