Public water system record

Del Oro River Island Serv Terr #2

Serves an area of Tulare County, CA · 89 people served

Federal records show 11 health-based violations and 3 monitoring/reporting issues for Del Oro River Island Serv Terr #2 in the last ten years. The most serious issue in this window was a resolved Combined Uranium violation.

  • CA5402048
  • CHICO
  • CA
  • 89 served

System profile

Source water Groundwater
ZIP 95927
EPA system ID CA5402048

Verify this system on EPA ECHO →

Health-based violations, last 10 years
11
Resolved
11
Unresolved
0
Any acute record
Yes
Monitoring issues, last 10 years
3

Key facts

  • Del Oro River Island Serv Terr #2 draws water from 2 wells.
  • Highest measured level in the last 10 years: Nitrate, 11 mg/L, federal limit 10 mg/L (1.1 times the limit), 2019.
  • Most recent formal enforcement: compliance order (no penalty) by California, December 2024.
  • Record on file since 1993, with 27 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 30 service lines.

Check whether Del Oro River Island Serv Terr #2 serves your address

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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 Oct 1, 2020 Resolved No
Combined Uranium
Contaminant limit exceeded
340 Apr 1, 2020 Resolved No
Combined Uranium
Contaminant limit exceeded
340 Jan 1, 2020 Resolved No
Nitrate
Contaminant limit exceeded
Measured 11 mg/L, federal limit 10 mg/L (1.1 times the limit)
330 Oct 1, 2019 Resolved Yes
Combined Uranium
Contaminant limit exceeded
340 Oct 1, 2019 Resolved No
Combined Uranium
Contaminant limit exceeded
340 Jul 1, 2019 Resolved No
Combined Uranium
Contaminant limit exceeded
340 Apr 1, 2019 Resolved No
Combined Uranium
Contaminant limit exceeded
340 Jan 1, 2019 Resolved No
Combined Uranium
Contaminant limit exceeded
340 Oct 1, 2018 Resolved No
Combined Uranium
Contaminant limit exceeded
340 Jul 1, 2018 Resolved No
Combined Uranium
Contaminant limit exceeded
340 Apr 1, 2018 Resolved No

Monitoring and reporting issues

Since October 2016

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

Issue Start date Status
Revised Total Coliform Rule
Monitoring violation
Aug 1, 2024 Resolved
Lead and Copper Rule
Monitoring and reporting
Jan 1, 2012 Resolved
Consumer Confidence Rule
OTHER
Jul 1, 2003 Resolved

Full record since 1993

EPA's records for Del Oro River Island Serv Terr #2 go back to 1993. Before October 19, 2016 they list 27 health-based violations (27 resolved) and 11 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1990s 1 3
2000s 15 6
2010 to October 18, 2016 11 2
October 19, 2016 to 2019 8 0
2020s 3 1

Most recent health-based violation before October 19, 2016: Total Coliform, began February 2016, Resolved.

Show all 27 health-based violations before October 19, 2016
Contaminant Start date Status
Total Coliform
Contaminant limit exceeded
Feb 1, 2016 Resolved
Nitrate (acute)
Contaminant limit exceeded
Jan 1, 2014 Resolved
Nitrate (acute)
Contaminant limit exceeded
Apr 1, 2013 Resolved
Nitrate (acute)
Contaminant limit exceeded
Oct 1, 2012 Resolved
Nitrate (acute)
Contaminant limit exceeded
Apr 1, 2012 Resolved
Nitrate (acute)
Contaminant limit exceeded
Jan 1, 2012 Resolved
Nitrate (acute)
Contaminant limit exceeded
Apr 1, 2011 Resolved
Nitrate (acute)
Contaminant limit exceeded
Jan 1, 2011 Resolved
Nitrate (acute)
Contaminant limit exceeded
Oct 1, 2010 Resolved
Nitrate (acute)
Contaminant limit exceeded
Apr 1, 2010 Resolved
Nitrate (acute)
Contaminant limit exceeded
Jan 1, 2010 Resolved
Nitrate (acute)
Contaminant limit exceeded
Oct 1, 2006 Resolved
Nitrate (acute)
Contaminant limit exceeded
Jul 1, 2006 Resolved
Nitrate (acute)
Contaminant limit exceeded
Apr 1, 2006 Resolved
Nitrate (acute)
Contaminant limit exceeded
Jan 1, 2006 Resolved
Nitrate (acute)
Contaminant limit exceeded
Oct 1, 2005 Resolved
Total Coliform
Contaminant limit exceeded
Apr 1, 2005 Resolved
Total Coliform
Contaminant limit exceeded
Feb 1, 2005 Resolved
Nitrate (acute)
Contaminant limit exceeded
Jan 1, 2005 Resolved
Nitrate (acute)
Contaminant limit exceeded
Dec 1, 2004 Resolved
Total Coliform
Contaminant limit exceeded
Nov 1, 2004 Resolved
Nitrate (acute)
Contaminant limit exceeded
Jul 1, 2004 Resolved
Nitrate (acute)
Contaminant limit exceeded
Jul 1, 2003 Resolved
Total Coliform
Contaminant limit exceeded
May 1, 2002 Resolved
Nitrate (acute)
Contaminant limit exceeded
Jan 1, 2002 Resolved
Nitrate (acute)
Contaminant limit exceeded
Jan 1, 2001 Resolved
Total Coliform
Contaminant limit exceeded
Aug 1, 1997 Resolved

Enforcement actions

California regulators took 7 formal enforcement actions against Del Oro River Island Serv Terr #2 and issued 2 boil water orders between 1998 and 2024. The most recent was a compliance order (no penalty) in December 2024.

Date By Action Violations covered
Dec 17, 2024 California Compliance order (no penalty) 1 violation: Revised Total Coliform Rule
Sep 26, 2019 California Compliance order (no penalty) 10 violations (10 health-based): Combined Uranium
Oct 16, 2008 California Compliance order (no penalty) 18 violations (17 health-based): Nitrate
Jul 12, 2005 California Compliance order (no penalty) 1 violation (1 health-based): Total Coliform
May 26, 2005 California Compliance order (no penalty) 1 violation (1 health-based): Total Coliform
Mar 15, 2005 California Compliance order (no penalty) 1 violation (1 health-based): Nitrate
Oct 15, 2004 California Compliance order (no penalty) 1 violation (1 health-based): Nitrate
May 31, 1998 California Boil water order 2 violations (1 health-based): Total Coliform
Jan 1, 1998 California Boil water order 1 violation

What the violations mean

Combined Uranium

10 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.

Nitrate

1 incident

Nitrate exceeded the federal limit

High nitrate is especially dangerous for infants under 6 months and can cause blue baby syndrome

Where the water comes from

Del Oro River Island Serv Terr #2 draws water from 2 wells.

Annual water quality report

Del Oro River Island Serv Terr #2 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 Del Oro River Island Serv Terr #2 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.