Public water system record

Hi Desert MWC

Serves an area of San Bernardino County, CA · 112 people served

Federal records show 7 health-based violations and 8 monitoring/reporting issues for Hi Desert MWC in the last ten years, including an unresolved LEAD AND COPPER RULE REVISIONS violation.

CA3600123
BARSTOW
CA
112 served

System profile

Source water Groundwater

ZIP 92311

EPA system ID CA3600123

Verify this system on EPA ECHO →

Health-based violations, last 10 years: 7
Resolved: 0
Unresolved: 1
Archived by EPA: 6
Any acute record: No
Monitoring issues, last 10 years: 8

Key facts

Hi Desert MWC draws water from 2 wells.
Highest measured level in the last 10 years: Arsenic, 0.0169 mg/L, federal limit 0.01 mg/L (1.7 times the limit), 2024.
Most recent formal enforcement: compliance order (no penalty) by California, November 2025.
Record on file since 2012, with 0 health-based violations before October 19, 2016.

Check whether Hi Desert MWC serves your address

Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

Contaminant	Rule family	Start date	Status	Acute
Arsenic Contaminant limit exceeded Measured 0.0112 mg/L, federal limit 0.01 mg/L (1.1 times the limit)	330	Oct 1, 2025	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0112 mg/L, federal limit 0.01 mg/L (1.1 times the limit)	330	Jul 1, 2025	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0113 mg/L, federal limit 0.01 mg/L (1.1 times the limit)	330	Apr 1, 2025	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0142 mg/L, federal limit 0.01 mg/L (1.4 times the limit)	330	Jan 1, 2025	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
LEAD AND COPPER RULE REVISIONS Treatment technique failure	350	Oct 17, 2024	Active	No
Arsenic Contaminant limit exceeded Measured 0.0169 mg/L, federal limit 0.01 mg/L (1.7 times the limit)	330	Oct 1, 2024	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0165 mg/L, federal limit 0.01 mg/L (1.7 times the limit)	330	Jul 1, 2024	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No

Monitoring and reporting issues

Since October 2016

Missed tests or reports, not contaminants found above a limit.

Issue	Start date	Status
Public Notice OTHER	Dec 31, 2025	Active
Consumer Confidence Rule OTHER	Jul 1, 2025	Active Enforcement action in place
LEAD AND COPPER RULE REVISIONS RPT	Oct 17, 2024	Active
Lead and Copper Rule Monitoring and reporting	Oct 1, 2023	Active Enforcement action in place
Consumer Confidence Rule OTHER	Jul 1, 2023	Resolved
Lead and Copper Rule Monitoring and reporting	Oct 1, 2021	Active Enforcement action in place
Nitrate Monitoring and reporting	Jan 1, 2017	Resolved
Nitrite Monitoring and reporting	Jan 1, 2015	Resolved

Full record since 2012

EPA's records for Hi Desert MWC go back to 2012. Before October 19, 2016 they list no health-based violations and 6 monitoring or reporting violations.

Violations that began in	Health-based	Monitoring and reporting
2010 to October 18, 2016	0	6
October 19, 2016 to 2019	0	1
2020s	7	6

Enforcement actions

California regulators took 9 formal enforcement actions against Hi Desert MWC between 2013 and 2025. The most recent was a compliance order (no penalty) in November 2025.

Date	By	Action	Violations covered
Nov 25, 2025	California	Compliance order (no penalty)	2 violations (2 health-based): Arsenic
Nov 19, 2025	California	Compliance order (no penalty)	1 violation: Lead and Copper Rule
Oct 22, 2025	California	Compliance order (no penalty)	1 violation: Consumer Confidence Rule
Feb 22, 2024	California	Compliance order (no penalty)	1 violation: Consumer Confidence Rule
Jul 3, 2023	California	Compliance order (no penalty)	5 violations (5 health-based): Arsenic
Nov 16, 2021	California	Compliance order (no penalty)	1 violation: Lead and Copper Rule
Sep 6, 2018	California	Compliance order (no penalty)	1 violation: Nitrate
Sep 5, 2018	California	Compliance order (no penalty)	1 violation: Nitrite
Sep 9, 2013	California	Administrative penalty	4 violations: Consumer Confidence Rule, 1,2-DIBROMO-3-CHLOROPROPANE, Arsenic, ETHYLENE DIBROMIDE

What the violations mean

Arsenic

6 incidents

Arsenic exceeded the federal limit

Long-term arsenic exposure is linked to cancer and cardiovascular effects

LEAD AND COPPER RULE REVISIONS

1 incident

The system did not complete a treatment step or action that the LEAD AND COPPER RULE REVISIONS requires (a treatment technique violation).

The utility had to notify customers about this violation.

Where the water comes from

Hi Desert MWC draws water from 2 wells.

Annual water quality report

Hi Desert MWC must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.

Systems serving 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask Hi Desert MWC for a copy.

Find a posted report with EPA's Consumer Confidence Report search

Testing your own water

To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by California.

Certified drinking water labs by state EPA guidance for private wells