Public water system record

Hollister Ranch Estates

Serves an area of San Benito County, CA · 150 people served

Federal records show 4 health-based violations and 4 monitoring/reporting issues for Hollister Ranch Estates in the last ten years. The most serious issue in this window was a resolved Combined Uranium violation.

  • CA3500904
  • HOLLISTER
  • CA
  • 150 served

System profile

Source water Groundwater
ZIP 95023
EPA system ID CA3500904

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Health-based violations, last 10 years
4
Resolved
4
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
4

Key facts

  • Hollister Ranch Estates draws water from 2 wells.
  • Most recent formal enforcement: compliance order (no penalty) by California, July 2023.
  • Record on file since 1999, with 8 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 37 service lines.

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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
Combined Uranium
Contaminant limit exceeded
340 Jul 1, 2017 Resolved No
Combined Uranium
Contaminant limit exceeded
340 Apr 1, 2017 Resolved No
Combined Uranium
Contaminant limit exceeded
340 Jan 1, 2017 Resolved No
Combined Uranium
Contaminant limit exceeded
340 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
Nitrate
Monitoring and reporting
Apr 1, 2023 Resolved
Revised Total Coliform Rule
Monitoring violation
Nov 1, 2019 Resolved
Revised Total Coliform Rule
Monitoring violation
May 1, 2017 Resolved
E. coli
Monitoring and reporting
Apr 8, 2017 Resolved

Full record since 1999

EPA's records for Hollister Ranch Estates go back to 1999. Before October 19, 2016 they list 8 health-based violations (8 resolved) and 7 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1990s 1 2
2000s 2 4
2010 to October 18, 2016 5 1
October 19, 2016 to 2019 3 3
2020s 0 1

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

Show all 8 health-based violations before October 19, 2016
Contaminant Start date Status
Combined Uranium
Contaminant limit exceeded
Oct 1, 2016 Resolved
Combined Uranium
Contaminant limit exceeded
Jul 1, 2016 Resolved
Combined Uranium
Contaminant limit exceeded
Apr 1, 2016 Resolved
Combined Uranium
Contaminant limit exceeded
Jan 1, 2016 Resolved
Combined Uranium
Contaminant limit exceeded
Oct 1, 2015 Resolved
Total Coliform
Contaminant limit exceeded
Aug 1, 2003 Resolved
Total Coliform
Contaminant limit exceeded
Sep 1, 2000 Resolved
Total Coliform
Contaminant limit exceeded
Jul 1, 1999 Resolved

Enforcement actions

California regulators took 7 formal enforcement actions against Hollister Ranch Estates between 2001 and 2023. The most recent was a compliance order (no penalty) in July 2023.

Date By Action Violations covered
Jul 31, 2023 California Compliance order (no penalty) 1 violation: Nitrate
Jan 7, 2020 California Compliance order (no penalty) 1 violation: Revised Total Coliform Rule
Aug 31, 2017 California Compliance order (no penalty) 2 violations: E. coli, Revised Total Coliform Rule
Jun 1, 2016 California Compliance order (no penalty) 8 violations (8 health-based): Combined Uranium
Mar 27, 2009 California Compliance order (no penalty) 3 violations: Nitrate, Public Notice
Oct 10, 2003 California Compliance order (no penalty) 1 violation (1 health-based): Total Coliform
Jan 29, 2001 California Compliance order (no penalty) 2 violations: Benzene, Nitrate

What the violations mean

Combined Uranium

4 incidents

Test results for Combined Uranium were above the federal limit (a maximum contaminant level violation).

The utility had to notify customers about each of these violations.

Where the water comes from

Hollister Ranch Estates draws water from 2 wells.

Annual water quality report

Hollister Ranch Estates 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 Hollister Ranch Estates 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.