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Public water system record

Sierra Country Club

Serves an area of Island County, WA · 400 people served

Federal records show 9 health-based violations and 2 monitoring/reporting issues for Sierra Country Club in the last ten years. The most serious issue in this window was a Haloacetic Acids (HAA5) violation that EPA lists as archived, not resolved.

  • WA5378975
  • COUPEVILLE
  • WA
  • 400 served

System profile

Source water Groundwater
ZIP 98239
EPA system ID WA5378975

Verify this system on EPA ECHO →

Health-based violations, last 10 years
9
Resolved
0
Unresolved
0
Archived by EPA
9
Any acute record
No
Monitoring issues, last 10 years
2

Key facts

  • Sierra Country Club draws water from 5 wells.
  • Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 229.3 µg/L, federal limit 80 µg/L (2.9 times the limit), 2024.
  • Most recent formal enforcement: compliance order (no penalty) by Washington, May 2024.
  • Record on file since 1979, with 0 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 233 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 61.1 µg/L, federal limit 60 µg/L (at or just above 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
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 84.95 µg/L, federal limit 60 µg/L (1.4 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 94.85 µg/L, federal limit 80 µg/L (1.2 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
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 115.9 µg/L, federal limit 60 µg/L (1.9 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 229.3 µg/L, federal limit 80 µg/L (2.9 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
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 117.6 µg/L, federal limit 60 µg/L (2 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 206.7 µg/L, federal limit 80 µg/L (2.6 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
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 117.6 µg/L, federal limit 60 µg/L (2 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 206.7 µg/L, federal limit 80 µg/L (2.6 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

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
 Oct 1, 2023 Resolved
Haloacetic Acids (HAA5)
Monitoring and reporting
 Oct 1, 2023 Resolved

Full record since 1979

EPA's records for Sierra Country Club go back to 1979. Before October 19, 2016 they list no health-based violations and 3 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1970s 0 1
1990s 0 1
2000s 0 1
2020s 9 2

Enforcement actions

Washington regulators took 1 formal enforcement action against Sierra Country Club in 2024. The most recent was a compliance order (no penalty) in May 2024.

Date By Action Violations covered
May 10, 2024 Washington Compliance order (no penalty) 9 violations (9 health-based): Haloacetic Acids (HAA5), Total Trihalomethanes (TTHMs)

What the violations mean

Haloacetic Acids (HAA5)

5 incidents

Haloacetic acid byproducts exceeded the federal limit

Long-term exposure to HAAs may increase cancer risk

Total Trihalomethanes (TTHMs)

4 incidents

Disinfection byproduct levels exceeded the federal limit

Long-term TTHM exposure may increase bladder cancer risk

Where the water comes from

Sierra Country Club draws water from 5 wells.

Annual water quality report

Sierra Country Club 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 Sierra Country Club 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