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Public water system record

Robin Way Water System

Serves an area of Sonoma County, CA · 66 people served

Federal records show 5 health-based violations and 4 monitoring/reporting issues for Robin Way Water System in the last ten years. The most serious issue in this window was a Nitrate violation that EPA lists as archived, not resolved.

  • CA4900913
  • FAIRFIELD
  • CA
  • 66 served

System profile

Source water Groundwater
ZIP 94534
EPA system ID CA4900913

Verify this system on EPA ECHO →

Health-based violations, last 10 years
5
Resolved
0
Unresolved
0
Archived by EPA
5
Any acute record
Yes
Monitoring issues, last 10 years
4

Key facts

  • Robin Way Water System draws water from 1 well.
  • Highest measured level in the last 10 years: Nitrate, 15 mg/L, federal limit 10 mg/L (1.5 times the limit), 2023.
  • Most recent formal enforcement: compliance order (no penalty) by California, August 2024.
  • Record on file since 1984, with 0 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 16 unknown out of 16 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 15 mg/L, federal limit 10 mg/L (1.5 times the limit)
 330 Apr 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 Yes
Nitrate
Contaminant limit exceeded
Measured 15 mg/L, federal limit 10 mg/L (1.5 times the limit)
 330 Jan 1, 2023 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 Jan 1, 2022 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 Yes
Nitrate
Contaminant limit exceeded
Measured 14 mg/L, federal limit 10 mg/L (1.4 times the limit)
 330 Jun 1, 2019 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 May 1, 2019 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 Yes

Monitoring and reporting issues

Since October 2016

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

Issue Start date Status
Haloacetic Acids (HAA5)
Monitoring and reporting
 Nov 1, 2019 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Total Trihalomethanes (TTHMs)
Monitoring and reporting
 Nov 1, 2019 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Public Notice
OTHER
 Aug 27, 2012 Resolved
Lead and Copper Rule
Monitoring and reporting
 Jun 1, 2000 Resolved

Full record since 1984

EPA's records for Robin Way Water System go back to 1984. Before October 19, 2016 they list no health-based violations and 15 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1980s 0 3
1990s 0 3
2000s 0 6
2010 to October 18, 2016 0 3
October 19, 2016 to 2019 2 2
2020s 3 0

Enforcement actions

California regulators took 10 formal enforcement actions against Robin Way Water System between 2003 and 2024. The most recent was a compliance order (no penalty) in August 2024.

Date By Action Violations covered
Aug 6, 2024 California Compliance order (no penalty) 2 violations: Haloacetic Acids (HAA5), Total Trihalomethanes (TTHMs)
Jun 13, 2019 California Compliance order (no penalty) 5 violations (5 health-based): Nitrate
Jun 10, 2013 California Administrative penalty 1 violation: Nitrate
Sep 17, 2012 California Compliance order (no penalty) 1 violation: Nitrate
Aug 27, 2012 California Compliance order (no penalty) 1 violation: Public Notice
Jun 13, 2007 California Compliance order (no penalty) 1 violation: Nitrate
May 4, 2007 California Compliance order (no penalty) 2 violations: Nitrate, Total Trihalomethanes (TTHMs)
Oct 24, 2006 California Compliance order (no penalty) 1 violation: Total Coliform
Mar 23, 2004 California Compliance order (no penalty) 1 violation: Total Coliform
Jun 23, 2003 California Compliance order (no penalty) 4 violations: Arsenic, Nitrite, 1,1,1-Trichloroethane, Lead and Copper Rule

What the violations mean

Nitrate

5 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

Robin Way Water System draws water from 1 well.

Annual water quality report

Robin Way Water System 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 Robin Way Water System 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