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Public water system record

Arrowhead Beach Coop Water Assoc

Serves Camano, Island County, WA · 167 people served

Federal records show 17 health-based violations and 5 monitoring/reporting issues for Arrowhead Beach Coop Water Assoc 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.

  • WA5303000
  • MT VERNON
  • WA
  • 167 served

System profile

Source water Groundwater
ZIP 98273
EPA system ID WA5303000

Verify this system on EPA ECHO →

Health-based violations, last 10 years
17
Resolved
1
Unresolved
0
Archived by EPA
16
Any acute record
No
Monitoring issues, last 10 years
5

Key facts

  • Arrowhead Beach Coop Water Assoc draws water from 6 wells.
  • Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 125.6 µg/L, federal limit 80 µg/L (1.6 times the limit), 2023.
  • Most recent formal enforcement: compliance order (no penalty) by Washington, September 2022.
  • Record on file since 1979, with 0 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 91 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 85.28 µg/L, federal limit 80 µg/L (1.1 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 80.95 µg/L, federal limit 80 µg/L (at or just above 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 82.5 µg/L, federal limit 80 µg/L (at or just above 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 84.6 µg/L, federal limit 80 µg/L (1.1 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 85.8 µg/L, federal limit 80 µg/L (1.1 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 91.43 µg/L, federal limit 80 µg/L (1.1 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 115.07 µg/L, federal limit 80 µg/L (1.4 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 121 µg/L, federal limit 80 µg/L (1.5 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 125.6 µg/L, federal limit 80 µg/L (1.6 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 117.1 µg/L, federal limit 80 µg/L (1.5 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 106.1 µg/L, federal limit 80 µg/L (1.3 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 98.2 µg/L, federal limit 80 µg/L (1.2 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 97.4 µg/L, federal limit 80 µg/L (1.2 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 98.6 µg/L, federal limit 80 µg/L (1.2 times the limit)
 220 Jul 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 91.1 µg/L, federal limit 80 µg/L (1.1 times the limit)
 220 Apr 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 86.3 µg/L, federal limit 80 µg/L (1.1 times the limit)
 220 Jan 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 90.7 µg/L, federal limit 80 µg/L (1.1 times the limit)
 220 Apr 1, 2018 Resolved No

Monitoring and reporting issues

Since October 2016

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

Issue Start date Status
Arsenic
Monitoring and reporting
 Jan 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Haloacetic Acids (HAA5)
Monitoring and reporting
 Oct 1, 2017 Resolved
Total Trihalomethanes (TTHMs)
Monitoring and reporting
 Oct 1, 2017 Resolved
Consumer Confidence Rule
OTHER
 Jul 1, 2017 Resolved
Nitrate
Monitoring and reporting
 Jan 1, 2017 Resolved

Full record since 1979

EPA's records for Arrowhead Beach Coop Water Assoc go back to 1979. Before October 19, 2016 they list no health-based violations and 12 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1970s 0 9
1990s 0 2
2000s 0 1
October 19, 2016 to 2019 1 4
2020s 16 1

Enforcement actions

Washington regulators took 1 formal enforcement action against Arrowhead Beach Coop Water Assoc in 2022. The most recent was a compliance order (no penalty) in September 2022.

Date By Action Violations covered
Sep 27, 2022 Washington Compliance order (no penalty) 16 violations (16 health-based): Total Trihalomethanes (TTHMs)

What the violations mean

Total Trihalomethanes (TTHMs)

17 incidents

Disinfection byproduct levels exceeded the federal limit

Long-term TTHM exposure may increase bladder cancer risk

Where the water comes from

Arrowhead Beach Coop Water Assoc draws water from 6 wells.

Annual water quality report

Arrowhead Beach Coop Water Assoc 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 Arrowhead Beach Coop Water Assoc 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