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Public water system record

Del Oro Water Co - Metropolitan District

Serves an area of Fresno County, CA · 92 people served

Federal records show 9 health-based violations and no monitoring/reporting issues for Del Oro Water Co - Metropolitan District in the last ten years. The most serious issue in this window was a Nitrate violation that EPA lists as archived, not resolved.

  • CA1000057
  • CHICO
  • CA
  • 92 served

System profile

Source water Groundwater
ZIP 95927
EPA system ID CA1000057

Verify this system on EPA ECHO →

Health-based violations, last 10 years
9
Resolved
0
Unresolved
0
Archived by EPA
9
Any acute record
Yes
Monitoring issues, last 10 years
0

Key facts

  • Del Oro Water Co - Metropolitan District draws water from 1 well.
  • Highest measured level in the last 10 years: Nitrate, 12 mg/L, federal limit 10 mg/L (1.2 times the limit), 2021.
  • Most recent formal enforcement: compliance order (no penalty) by California, January 2020.
  • Record on file since 1980, with 0 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 29 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
Nitrate
Contaminant limit exceeded
Measured 10.6 mg/L, federal limit 10 mg/L (1.1 times the limit)
 330 Oct 1, 2021 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 Yes
Nitrate
Contaminant limit exceeded
Measured 10.9 mg/L, federal limit 10 mg/L (1.1 times the limit)
 330 Jul 1, 2021 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 Yes
Nitrate
Contaminant limit exceeded
Measured 12 mg/L, federal limit 10 mg/L (1.2 times the limit)
 330 Apr 1, 2021 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 Yes
Nitrate
Contaminant limit exceeded
Measured 11.3 mg/L, federal limit 10 mg/L (1.1 times the limit)
 330 Jan 1, 2021 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 Yes
Nitrate
Contaminant limit exceeded
Measured 11 mg/L, federal limit 10 mg/L (1.1 times the limit)
 330 Oct 1, 2020 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 Yes
Nitrate
Contaminant limit exceeded
Measured 11 mg/L, federal limit 10 mg/L (1.1 times the limit)
 330 Jul 1, 2020 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 Yes
Nitrate
Contaminant limit exceeded
Measured 10.4 mg/L, federal limit 10 mg/L (at or just above the limit)
 330 Apr 1, 2020 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 Yes
Nitrate
Contaminant limit exceeded
Measured 10.7 mg/L, federal limit 10 mg/L (1.1 times the limit)
 330 Jan 1, 2020 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 Yes
Nitrate
Contaminant limit exceeded
Measured 11.3 mg/L, federal limit 10 mg/L (1.1 times the limit)
 330 Nov 1, 2019 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 Yes

Full record since 1980

EPA's records for Del Oro Water Co - Metropolitan District go back to 1980. Before October 19, 2016 they list no health-based violations and 10 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1980s 0 7
1990s 0 1
2000s 0 2
October 19, 2016 to 2019 1 0
2020s 8 0

Enforcement actions

California regulators took 1 formal enforcement action against Del Oro Water Co - Metropolitan District in 2020. The most recent was a compliance order (no penalty) in January 2020.

Date By Action Violations covered
Jan 7, 2020 California Compliance order (no penalty) 9 violations (9 health-based): Nitrate

What the violations mean

Nitrate

9 incidents

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 Water Co - Metropolitan District draws water from 1 well.

Annual water quality report

Del Oro Water Co - Metropolitan District 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 Water Co - Metropolitan District 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