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Public water system record

Penn Cove Water and Sewer District

Serves an area of Island County, WA · 460 people served

Federal records show 18 health-based violations and 3 monitoring/reporting issues for Penn Cove Water and Sewer District in the last ten years. The most serious issue in this window was a Total Trihalomethanes (TTHMs) violation that EPA lists as archived, not resolved.

  • WA5366950
  • OAK HARBOR
  • WA
  • 460 served

System profile

Source water Groundwater
ZIP 98277
EPA system ID WA5366950

Verify this system on EPA ECHO →

Health-based violations, last 10 years
18
Resolved
5
Unresolved
0
Archived by EPA
13
Any acute record
No
Monitoring issues, last 10 years
3

Key facts

  • Penn Cove Water and Sewer District draws water from 3 wells.
  • Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 138.75 µg/L, federal limit 80 µg/L (1.7 times the limit), 2024.
  • Most recent formal enforcement: compliance order (no penalty) by Washington, August 2020.
  • Record on file since 1979, with 1 health-based violation before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 301 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
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 116.75 µg/L, federal limit 80 µg/L (1.5 times the limit)
 220 Oct 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 115.9 µg/L, federal limit 80 µg/L (1.4 times the limit)
 220 Jul 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 114.93 µg/L, federal limit 80 µg/L (1.4 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
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 118.8 µg/L, federal limit 80 µg/L (1.5 times 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
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 122.4 µg/L, federal limit 80 µg/L (1.5 times the limit)
 220 Oct 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 132.23 µg/L, federal limit 80 µg/L (1.7 times the limit)
 220 Jul 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 138.75 µg/L, federal limit 80 µg/L (1.7 times the limit)
 220 Apr 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 124.7 µg/L, federal limit 80 µg/L (1.6 times the limit)
 220 Jan 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 111.4 µg/L, federal limit 80 µg/L (1.4 times the limit)
 220 Oct 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 102 µg/L, federal limit 80 µg/L (1.3 times the limit)
 220 Jul 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 98.3 µg/L, federal limit 80 µg/L (1.2 times the limit)
 220 Apr 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 106.5 µg/L, federal limit 80 µg/L (1.3 times the limit)
 220 Jan 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 90.6 µg/L, federal limit 80 µg/L (1.1 times the limit)
 220 Oct 1, 2022 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 83.8 µg/L, federal limit 80 µg/L (at or just above the limit)
 220 Jul 1, 2021 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 98.2 µg/L, federal limit 80 µg/L (1.2 times the limit)
 220 Oct 1, 2020 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 101 µg/L, federal limit 80 µg/L (1.3 times the limit)
 220 Jul 1, 2020 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 102 µg/L, federal limit 80 µg/L (1.3 times the limit)
 220 Apr 1, 2020 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 86.2 µg/L, federal limit 80 µg/L (1.1 times the limit)
 220 Jan 1, 2020 Resolved No

Monitoring and reporting issues

Since October 2016

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

Issue Start date Status
Total Trihalomethanes (TTHMs)
Monitoring and reporting
 Jul 1, 2023 Resolved
Haloacetic Acids (HAA5)
Monitoring and reporting
 Jul 1, 2023 Resolved
Nitrate
Monitoring and reporting
 Jan 1, 2020 Resolved

Full record since 1979

EPA's records for Penn Cove Water and Sewer District go back to 1979. Before October 19, 2016 they list 1 health-based violation (1 archived by EPA without a recorded fix) and 11 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1970s 0 9
1990s 1 1
2010 to October 18, 2016 0 1
2020s 18 3

Most recent health-based violation before October 19, 2016: Total Coliform, began September 1993, Archived.

Show the health-based violation before October 19, 2016
Contaminant Start date Status
Total Coliform
Contaminant limit exceeded
 Sep 1, 1993 Archived

Enforcement actions

Washington regulators took 1 formal enforcement action against Penn Cove Water and Sewer District in 2020. The most recent was a compliance order (no penalty) in August 2020.

Date By Action Violations covered
Aug 6, 2020 Washington Compliance order (no penalty) 18 violations (18 health-based): Total Trihalomethanes (TTHMs)

What the violations mean

Total Trihalomethanes (TTHMs)

18 incidents

Disinfection byproduct levels exceeded the federal limit

Long-term TTHM exposure may increase bladder cancer risk

Where the water comes from

Penn Cove Water and Sewer District draws water from 3 wells.

Annual water quality report

Penn Cove Water and Sewer 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 Penn Cove Water and Sewer 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 Washington.

Certified drinking water labs by state EPA guidance for private wells