Sierra Country Club
EPA ID: WA5378975 · 400 people served · 1 ZIP code
ZipCheckup's reading of EPA records for Sierra Country Club (WA5378975): 9 health-based violations recorded since 2021. Within the EPA violation records on file, Sierra Country Club accumulated 11 violations, and every finding is recorded as resolved; the utility supplies water to approximately 400 people. Resolution of past violations is not a statement about current water quality.
Data: EPA SDWIS
Service Area Map
Coverage area for Sierra Country Club Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Sierra Country Club have a median household income of $86,138 and about 7,492 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 47% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Sierra Country Club's water is classified in EPA records as a groundwater source. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
Superfund Proximity Note: This service area ranks in the 60th percentile nationally for proximity to Superfund (NPL) sites. Groundwater sources near contaminated sites may face elevated risk from industrial chemicals.
Infrastructure Risk
PFAS in ZIP Codes This System Serves
PFAS ("forever chemicals") have been reported in samples from water systems associated with the ZIP codes in this system's area. These results can come from other water systems serving the same ZIP codes; check the UCMR5 section for any results reported for this system. 7 detections recorded. 1 detection is above the level of a federal PFAS MCL (4 ppt for PFOA and PFOS), with compliance required from 2029.
Comparable Water Systems
Similar-sized systems in Washington
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Sierra Country Club (EPA ID: WA5378975) is a community water system in Washington that serves approximately 400 people from groundwater sources.
This system serves ZIP code 98239 in Coupeville.
Violation History
Status breakdown for accepted records with record years 2021-2026: 2 resolved, 9 archived, 0 addressed, and 0 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| October 1, 2024 | Total Haloacetic Acids (HAA5) | Health-based | Archived |
| July 1, 2024 | TTHM | Health-based | Archived |
| July 1, 2024 | Total Haloacetic Acids (HAA5) | Health-based | Archived |
| April 1, 2024 | TTHM | Health-based | Archived |
| April 1, 2024 | Total Haloacetic Acids (HAA5) | Health-based | Archived |
| January 1, 2024 | TTHM | Health-based | Archived |
| January 1, 2024 | Total Haloacetic Acids (HAA5) | Health-based | Archived |
| October 1, 2023 | Total Haloacetic Acids (HAA5) | Non-health-based | Resolved |
| October 1, 2023 | TTHM | Non-health-based | Resolved |
| October 1, 2023 | TTHM | Health-based | Archived |
| October 1, 2023 | Total Haloacetic Acids (HAA5) | Health-based | Archived |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Total Haloacetic Acids (HAA5) | MCL Violation, Monitoring & Reporting | 6 | Yes |
| TTHM | MCL Violation, Monitoring & Reporting | 5 | Yes |
Health Risk Details
Total Trihalomethanes (TTHM) (EPA limit: 0.08 mg/L)
Long-term exposure is associated with increased cancer risk, including bladder cancer; possible reproductive effects At-risk groups: pregnant women, long-term consumers of chlorinated water, people who frequently shower in chlorinated water.
Treatment options (verify a product is certified to reduce this contaminant): granular activated carbon (GAC), carbon block filter, point-of-entry aeration. Find the right filter →
Haloacetic Acids (HAA5) (EPA limit: 0.06 mg/L)
Cancer risk; reproductive & developmental effects At-risk groups: pregnant women, infants, long-term consumers of chlorinated municipal water.
Treatment options (verify a product is certified to reduce this contaminant): granular activated carbon (GAC), carbon block filter, reverse osmosis. Find the right filter →
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.0015 mg/L | No | N/A |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Ask your water utility whether running cold water for 2 minutes is enough to flush your plumbing before drinking.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by WA or modeled from parcel and building-footprint data.
- 98239 - Coupeville
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Sierra Country Club (WA5378975) on EPA.gov.
Frequently Asked Questions
Is Sierra Country Club water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for Sierra Country Club; its 11 accepted 2021-2026 records are resolved or archived. Historical compliance status does not establish conditions at a specific tap.
How many people does Sierra Country Club serve?
Sierra Country Club serves approximately 400 people across 1 ZIP code in Washington.
Where does Sierra Country Club get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Sierra Country Club (WA): 9 Health Violations. https://zipcheckup.com/water-system/wa5378975/
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author = {{ZipCheckup}},
title = {{Sierra Country Club (WA): 9 Health Violations}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/wa5378975/}
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What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Sierra Country Club (EPA ID: WA5378975) - request the latest Consumer Confidence Report or ask about specific contaminants.