Public water system record

Tierra Vista MWC

Serves an area of Monterey County, CA · 54 people served

Federal records show 3 health-based violations and 1 monitoring/reporting issue for Tierra Vista MWC in the last ten years, including an unresolved LEAD AND COPPER RULE REVISIONS violation.

CA2701959
SALINAS
CA
54 served

System profile

Source water Groundwater

ZIP 93908

EPA system ID CA2701959

Verify this system on EPA ECHO →

Health-based violations, last 10 years: 3
Resolved: 2
Unresolved: 1
Any acute record: No
Monitoring issues, last 10 years: 1

Key facts

Tierra Vista MWC draws water from 1 well.
Highest measured level in the last 10 years: Arsenic, 0.012 mg/L, federal limit 0.01 mg/L (1.2 times the limit), 2017.
Most recent formal enforcement: compliance order (no penalty) by California, December 2015.
Record on file since 1993, with 22 health-based violations before October 19, 2016.

Check whether Tierra Vista 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
LEAD AND COPPER RULE REVISIONS Treatment technique failure	350	Oct 17, 2024	Active	No
Arsenic Contaminant limit exceeded Measured 0.012 mg/L, federal limit 0.01 mg/L (1.2 times the limit)	330	Jan 1, 2017	Resolved	No
Arsenic Contaminant limit exceeded Measured 0.012 mg/L, federal limit 0.01 mg/L (1.2 times the limit)	330	Oct 1, 2016	Resolved	No

Monitoring and reporting issues

Since October 2016

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

Issue	Start date	Status
LEAD AND COPPER RULE REVISIONS RPT	Oct 17, 2024	Active

Full record since 1993

EPA's records for Tierra Vista MWC go back to 1993. Before October 19, 2016 they list 22 health-based violations (22 resolved) and 12 monitoring or reporting violations.

Violations that began in	Health-based	Monitoring and reporting
1990s	0	3
2000s	5	5
2010 to October 18, 2016	17	4
October 19, 2016 to 2019	1	0
2020s	1	1

Most recent health-based violation before October 19, 2016: Arsenic, began October 2016, Resolved.

Show all 22 health-based violations before October 19, 2016

Contaminant	Start date	Status
Arsenic Contaminant limit exceeded Measured 0.012 mg/L, federal limit 0.01 mg/L (1.2 times the limit)	Oct 1, 2016	Resolved
Arsenic Contaminant limit exceeded Measured 0.012 mg/L, federal limit 0.01 mg/L (1.2 times the limit)	Jul 1, 2016	Resolved
Arsenic Contaminant limit exceeded Measured 0.012 mg/L, federal limit 0.01 mg/L (1.2 times the limit)	Apr 1, 2016	Resolved
Arsenic Contaminant limit exceeded Measured 0.011 mg/L, federal limit 0.01 mg/L (1.1 times the limit)	Jan 1, 2016	Resolved
Arsenic Contaminant limit exceeded Measured 0.011 mg/L, federal limit 0.01 mg/L (1.1 times the limit)	Oct 1, 2015	Resolved
Arsenic Contaminant limit exceeded Measured 0.011 mg/L, federal limit 0.01 mg/L (1.1 times the limit)	Jul 1, 2015	Resolved
Arsenic Contaminant limit exceeded Measured 0.011 mg/L, federal limit 0.01 mg/L (1.1 times the limit)	Apr 1, 2015	Resolved
Arsenic Contaminant limit exceeded Measured 0.012 mg/L, federal limit 0.01 mg/L (1.2 times the limit)	Jan 1, 2015	Resolved
Arsenic Contaminant limit exceeded Measured 0.012 mg/L, federal limit 0.01 mg/L (1.2 times the limit)	Oct 1, 2014	Resolved
Arsenic Contaminant limit exceeded Measured 0.011 mg/L, federal limit 0.01 mg/L (1.1 times the limit)	Apr 1, 2014	Resolved
Arsenic Contaminant limit exceeded Measured 0.011 mg/L, federal limit 0.01 mg/L (1.1 times the limit)	Jan 1, 2013	Resolved
Arsenic Contaminant limit exceeded Measured 0.011 mg/L, federal limit 0.01 mg/L (1.1 times the limit)	Jul 1, 2012	Resolved
Arsenic Contaminant limit exceeded Measured 0.012 mg/L, federal limit 0.01 mg/L (1.2 times the limit)	Apr 1, 2012	Resolved
Arsenic Contaminant limit exceeded Measured 0.011 mg/L, federal limit 0.01 mg/L (1.1 times the limit)	Oct 1, 2011	Resolved
Arsenic Contaminant limit exceeded Measured 0.012 mg/L, federal limit 0.01 mg/L (1.2 times the limit)	Jul 1, 2011	Resolved
Arsenic Contaminant limit exceeded Measured 0.011 mg/L, federal limit 0.01 mg/L (1.1 times the limit)	Apr 1, 2011	Resolved
Arsenic Contaminant limit exceeded Measured 0.012 mg/L, federal limit 0.01 mg/L (1.2 times the limit)	Jan 1, 2011	Resolved
Total Coliform Contaminant limit exceeded	Feb 1, 2005	Resolved
Total Coliform Contaminant limit exceeded	Sep 1, 2004	Resolved
Total Coliform Contaminant limit exceeded	Jul 1, 2004	Resolved
Total Coliform Contaminant limit exceeded	Jan 1, 2004	Resolved
Total Coliform Contaminant limit exceeded	Dec 1, 2003	Resolved

Enforcement actions

California regulators took 2 formal enforcement actions against Tierra Vista MWC between 2011 and 2015. The most recent was a compliance order (no penalty) in December 2015.

Date	By	Action	Violations covered
Dec 9, 2015	California	Compliance order (no penalty)	22 violations (18 health-based): Arsenic
Apr 13, 2011	California	Compliance order (no penalty)	16 violations (12 health-based): Arsenic

What the violations mean

Arsenic

2 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

Tierra Vista MWC draws water from 1 well.

Annual water quality report

Tierra Vista 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 Tierra Vista 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