Public water system · CA3601082
ActiveCastle Mountain Mine
At a glance
Castle Mountain Mine (PWSID CA3601082) is an active non-transient non-community water system in San Bernardino County, Nevada. It reports serving 125 people through 3 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 7 violations for this system; none is health-based, and the most recent began in December 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
125
Service connections
3
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Castle Mountain Mine compare with other water systems in San Bernardino County?
By EPA's size categories, Castle Mountain Mine is a very small system (500 people or fewer). San Bernardino County has 3 active public water systems, and Castle Mountain Mine is the largest of them by population served. Its population served is about 87% above the county average of 67 people per system, and accounts for 63% of the 200 people reported by systems filed under the county. Across Nevada, the 643 active systems average 5,508 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Castle Mountain Mine is well 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. Nevada has 161 active non-transient non-community water systems, 25% of the state's 643 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 557 Nevada systems (87%) list groundwater as their primary source.
Who owns and regulates Castle Mountain Mine?
EPA lists Castle Mountain Mine 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. 3 of the 3 active systems in San Bernardino County (100%) are also privately owned.
Does Castle Mountain Mine have drinking water violations?
EPA's records list 7 violations for this system; none is health-based, and the most recent began in December 2025. The violations listed here began between July 1993 and December 2025. By type: 5 monitoring and reporting and 2 monitoring. The contaminant or rule involved most often is Lead and Copper Rule (3 of them). EPA lists 4 as archived, 2 as resolved and 1 as addressed. 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. 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. Addressed means the violation is not resolved or archived and is covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-12-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Archived |
| 2024-01-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2023-09-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Archived |
| 2023-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Archived |
| 2023-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Archived |
| 2020-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Addressed |
| 1993-07-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
All 7 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.
Castle Mountain Mine: frequently asked questions
Who runs Castle Mountain Mine?
Castle Mountain Mine (PWSID CA3601082) is a non-transient non-community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Castle Mountain Mine serve?
Castle Mountain Mine reports serving 125 people through 3 service connections in San Bernardino County, Nevada.
Where does Castle Mountain Mine 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 Castle Mountain Mine have any drinking water violations?
EPA's records list 7 violations for this system; none is health-based, and the most recent began in December 2025. 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 Castle Mountain Mine'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 7 violations for this system; none is health-based, and the most recent began in December 2025. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Castle Mountain Mine's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Castle Mountain Mine 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 |
|---|---|---|---|---|
| Primm Valley Golf Club | San Bernardino | 50 | Non-transient non-community | Groundwater |
| Nipton Water and Power | San Bernardino | 25 | Transient non-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, “Castle Mountain Mine, PWSID CA3601082, Nevada”, https://aquacensus.com/water-systems/nevada/castle-mountain-mine-ca3601082 (data as of October 1, 2026).