Public water system · CA3600141
ActiveMitsubishi Cement Plant Cushenbury
At a glance
Mitsubishi Cement Plant Cushenbury (PWSID CA3600141) is an active non-transient non-community water system in San Bernardino County, California. It reports serving 160 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 2 violations for this system; none is health-based, and the most recent began in July 1993.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
160
Service connections
1
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Mitsubishi Cement Plant Cushenbury compare with other water systems in San Bernardino County?
By EPA's size categories, Mitsubishi Cement Plant Cushenbury is a very small system (500 people or fewer). 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 non-transient non-community water system reports serving 430 people, so Mitsubishi Cement Plant Cushenbury is about 63% below 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. 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 Mitsubishi Cement Plant Cushenbury?
EPA lists Mitsubishi Cement Plant Cushenbury as privately owned. 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. 201 of the 306 active systems in San Bernardino County (66%) are also privately owned.
Does Mitsubishi Cement Plant Cushenbury have drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in July 1993. The violations listed here began between December 1982 and July 1993. By type: 1 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminant or rule involved is Lead and Copper Rule. EPA lists 1 as resolved and 1 as archived. 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. 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 |
|---|---|---|---|---|
| 1993-07-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1982-12-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | 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.
Mitsubishi Cement Plant Cushenbury: frequently asked questions
Who runs Mitsubishi Cement Plant Cushenbury?
Mitsubishi Cement Plant Cushenbury (PWSID CA3600141) is a non-transient non-community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Mitsubishi Cement Plant Cushenbury serve?
Mitsubishi Cement Plant Cushenbury reports serving 160 people through 1 service connection in San Bernardino County, California.
Where does Mitsubishi Cement Plant Cushenbury 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 Mitsubishi Cement Plant Cushenbury have any drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in July 1993. 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 Mitsubishi Cement Plant Cushenbury'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 July 1993. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Mitsubishi Cement Plant Cushenbury's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Mitsubishi Cement Plant Cushenbury 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, “Mitsubishi Cement Plant Cushenbury, PWSID CA3600141, California”, https://aquacensus.com/water-systems/california/mitsubishi-cement-plant-cushenbury-ca3600141 (data as of October 1, 2026).