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Public water system record

Groveland Community Serv Dist

Serves Pine Mountain Lake and Groveland, Tuolumne County, CA · 3,400 people served

Federal records show 3 health-based violations and 2 monitoring/reporting issues for Groveland Community Serv Dist in the last ten years, including an unresolved LEAD AND COPPER RULE REVISIONS violation.

  • CA5510009
  • GROVELAND
  • CA
  • 3,400 served

System profile

Source water Surface water
ZIP 95321
EPA system ID CA5510009

Verify this system on EPA ECHO →

Health-based violations, last 10 years
3
Resolved
0
Unresolved
1
Archived by EPA
2
Any acute record
No
Monitoring issues, last 10 years
2

Key facts

  • Groveland Community Serv Dist draws water from 3 surface water intakes.
  • Highest measured level in the last 10 years: Haloacetic Acids (HAA5), 0.064 mg/L, federal limit 0.06 mg/L (1.1 times the limit), 2025.
  • Most recent formal enforcement: compliance order (no penalty) by California, June 2025.
  • Record on file since 2005, with 0 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 2,015 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
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.064 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
 220 Apr 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.062 mg/L, federal limit 0.06 mg/L (at or just above the limit)
 220 Jan 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
LEAD AND COPPER RULE REVISIONS
Treatment technique failure
 350 Oct 17, 2024 Active No

Monitoring and reporting issues

Since October 2016

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

Issue Start date Status
LEAD AND COPPER RULE REVISIONS
RPT
 Oct 17, 2024 Active
Nitrate
Monitoring and reporting
 Jan 1, 2021 Resolved

Full record since 2005

EPA's records for Groveland Community Serv Dist go back to 2005. Before October 19, 2016 they list no health-based violations and 6 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
2000s 0 6
2020s 3 2

Enforcement actions

California regulators and EPA took 3 formal enforcement actions against Groveland Community Serv Dist between 2005 and 2025. The most recent was a compliance order (no penalty) in June 2025.

Date By Action Violations covered
Jun 17, 2025 California Compliance order (no penalty) 2 violations (2 health-based): Haloacetic Acids (HAA5)
Mar 25, 2022 California Compliance order with a penalty 1 violation: Nitrate
Dec 20, 2005 EPA Compliance order (no penalty) 6 violations: Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5)

What the violations mean

Haloacetic Acids (HAA5)

2 incidents

Haloacetic acid byproducts exceeded the federal limit

Long-term exposure to HAAs may increase cancer risk

LEAD AND COPPER RULE REVISIONS

1 incident

The system did not complete a treatment step or action that the LEAD AND COPPER RULE REVISIONS requires (a treatment technique violation).

The utility had to notify customers about this violation.

Where the water comes from

Groveland Community Serv Dist draws water from 3 surface water intakes.

Annual water quality report

Groveland Community Serv Dist 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.

Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.

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