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Public water system record

River Grove Mutual Water Assn

Serves Felton, Santa Cruz County, CA · 54 people served

Federal records show 7 health-based violations and 5 monitoring/reporting issues for River Grove Mutual Water Assn in the last ten years. The most serious issue in this window was a resolved Surface Water Treatment Rule violation.

  • CA4400621
  • FELTON
  • CA
  • 54 served

System profile

Source water Surface water
ZIP 95018
EPA system ID CA4400621

Verify this system on EPA ECHO →

Health-based violations, last 10 years
7
Resolved
7
Unresolved
0
Any acute record
Yes
Monitoring issues, last 10 years
5

Key facts

  • River Grove Mutual Water Assn draws water from 1 surface water intake.
  • Most recent formal enforcement: compliance order (no penalty) by California, October 2024.
  • Record on file since 1980, with 2 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 25 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
Surface Water Treatment Rule
Treatment technique failure
 120 Aug 1, 2024 Resolved No
Long Term 2 Enhanced Surface Water Treatment Rule
Treatment technique failure
 120 Feb 1, 2024 Resolved No
Surface Water Treatment Rule
Treatment technique failure
 120 Jan 1, 2023 Resolved No
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
 120 Jan 1, 2023 Resolved Yes
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
 120 Jan 1, 2022 Resolved Yes
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
 120 Dec 1, 2021 Resolved Yes
Surface Water Treatment Rule
Treatment technique failure
 120 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
Revised Total Coliform Rule
Monitoring violation
 Mar 1, 2023 Resolved
Total Trihalomethanes (TTHMs)
Monitoring and reporting
 Jan 1, 2023 Resolved
Haloacetic Acids (HAA5)
Monitoring and reporting
 Jan 1, 2019 Resolved
Total Trihalomethanes (TTHMs)
Monitoring and reporting
 Jan 1, 2019 Resolved
Nitrate-Nitrite
Monitoring and reporting
 Jan 1, 2018 Resolved

Full record since 1980

EPA's records for River Grove Mutual Water Assn go back to 1980. Before October 19, 2016 they list 2 health-based violations (2 resolved) and 14 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1980s 0 10
1990s 0 1
2000s 0 1
2010 to October 18, 2016 2 2
October 19, 2016 to 2019 0 3
2020s 6 2

Most recent health-based violation before October 19, 2016: Surface Water Treatment Rule, began October 2016, Resolved.

Show all 2 health-based violations before October 19, 2016
Contaminant Start date Status
Surface Water Treatment Rule
Treatment technique failure
 Oct 1, 2016 Resolved
Arsenic
Contaminant limit exceeded
 Apr 1, 2015 Resolved

Enforcement actions

California regulators took 9 formal enforcement actions against River Grove Mutual Water Assn between 2009 and 2024. The most recent was a compliance order (no penalty) in October 2024.

Date By Action Violations covered
Oct 30, 2024 California Compliance order (no penalty) 1 violation (1 health-based): Surface Water Treatment Rule
Jul 29, 2024 California Compliance order with a penalty 2 violations (1 health-based): Long Term 2 Enhanced Surface Water Treatment Rule, Revised Total Coliform Rule
Nov 13, 2023 California Compliance order (no penalty) 1 violation: Total Trihalomethanes (TTHMs)
Mar 9, 2023 California Compliance order (no penalty) 2 violations (2 health-based): Surface Water Treatment Rule, Interim Enhanced Surface Water Treatment Rule
Mar 3, 2022 California Compliance order with a penalty 1 violation (1 health-based): Interim Enhanced Surface Water Treatment Rule
Jan 27, 2022 California Compliance order (no penalty) 1 violation (1 health-based): Interim Enhanced Surface Water Treatment Rule
Jan 8, 2020 California Compliance order (no penalty) 2 violations: Haloacetic Acids (HAA5), Total Trihalomethanes (TTHMs)
Jan 28, 2019 California Compliance order (no penalty) 1 violation: Nitrate-Nitrite
Mar 25, 2009 California Compliance order (no penalty) 1 violation (1 health-based): Arsenic

What the violations mean

Surface Water Treatment Rule

3 incidents

The system did not complete a treatment step or action that the Surface Water Treatment Rule requires (a treatment technique violation).

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

Interim Enhanced Surface Water Treatment Rule

3 incidents

The system did not meet a filtration or treatment requirement for surface water

Inadequate treatment of surface water can let pathogens such as Cryptosporidium and Giardia through

Long Term 2 Enhanced Surface Water Treatment Rule

1 incident

The system failed required surface water treatment or filtration standards

Untreated or inadequately treated surface water can contain bacteria and viruses

Where the water comes from

River Grove Mutual Water Assn draws water from 1 surface water intake.

Annual water quality report

River Grove Mutual Water Assn 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 River Grove Mutual Water Assn 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