Water Quality in Coffman Cove, AK: 23 Violations — Grade C
Grade C · Score 66/100 · 1 water system · Updated 2026-05-03
Coffman Cove's water has moderate compliance issues. Residents in affected areas should consider filtration.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-05-03
The compliance history for Coffman Cove, AK includes 23 water violations on file with the EPA — a federal tally that spans health-based exceedances, monitoring failures, and enforcement actions logged under the Safe Drinking Water Act.
Water Quality by ZIP Code in Coffman Cove
Water quality varies across Coffman Cove's 1 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 99918 | C | 66 | 23 | 9 | View report → |
Violation Trend
EPA violations recorded for water systems serving Coffman Cove.
Water Quality Overview
Coffman Cove, Alaska receives a water quality grade of C with an overall score of 66 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
The 1 water system serving Coffman Cove have accumulated 23 EPA violations, including 9 health-based violations. These violations are tracked across 1 ZIP codes serving approximately 199 people.
What Grade C Means
A grade of C indicates moderate compliance issues. Coffman Cove's water systems have some violations that warrant attention. While the water may still be safe for most people, residents in affected ZIP codes should consider additional testing or filtration.
Lead Levels
The average 90th percentile lead level across Coffman Cove water systems is 0.0021 mg/L — within EPA limits. No ZIP codes exceed the EPA lead action level.
Radon Risk
Coffman Cove is in EPA Radon Zone 1 (High risk). The EPA recommends all homes in Zone 1 areas be tested for radon. Radon is the second leading cause of lung cancer after smoking.
Water Systems Serving Coffman Cove
Coffman Cove is served by 1 community water system regulated under the Safe Drinking Water Act. These systems collectively serve approximately 199 people across 1 ZIP codes.
Each water system is identified by a Public Water System ID (PWSID) and is required to:
- Test for over 90 regulated contaminants on a regular schedule
- Report results to the EPA and state regulators
- Issue an annual Consumer Confidence Report (CCR) to all customers
- Take corrective action when violations occur
The EPA has taken 10 enforcement actions against water systems serving Coffman Cove. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Coffman Cove
Enter your ZIP code on ZipCheckup to see your specific water system data, including contaminant levels, violation history, and safety scores
Request your CCR — your water utility must provide an annual Consumer Confidence Report with detailed test results for all monitored contaminants
Get a home test — certified kits cost $20–$50 and test for lead, bacteria, and common contaminants. Professional lab tests ($150–$400) cover a broader panel
Consider filtration — NSF-certified filters can remove specific contaminants. Reverse osmosis removes the broadest range; activated carbon is effective for chlorine and many organics
Check for advisories — monitor your local utility website and local news for boil water advisories or system alerts
Contaminants Detected in Coffman Cove Water Systems
The following contaminants have been detected or caused violations across Coffman Cove's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| Chlorite | Disinfection Byproducts | 1 mg/L | 7 | 1 | Yes |
| Revised Total Coliform Rule | Microbiological | N/A | 3 | 1 | No |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 0.08 mg/L | 3 | 1 | Yes |
| Surface Water Treatment Rule | Treatment Technique | N/A | 2 | 1 | No |
| E. coli | Microbiological | N/A | 2 | 1 | No |
| Fecal Coliform | Microbiological | N/A | 1 | 1 | No |
| Lead and Copper Rule | Treatment Technique | N/A | 1 | 1 | No |
MCL = Maximum Contaminant Level (EPA enforceable standard). Health-based violations indicate levels that may pose direct health risks.
Violation Trend Over Time
Year-by-year EPA violations recorded for water systems serving Coffman Cove:
| Year | Total Violations | Health-Based |
|---|---|---|
| 2021 | 3 | 3 |
| 2022 | 2 | 2 |
| 2024 | 1 | 1 |
| 2025 | 2 | 2 |
Violations have decreased from 3 in 2021 to 2 in 2025, indicating improving compliance.
EPA Enforcement History
The EPA and state regulators have taken 10 enforcement actions against water systems serving Coffman Cove. Recent actions:
| Date | Action Type |
|---|---|
| 2025-08-09 | State Informal Enforcement |
| 2025-07-30 | State Informal Action |
| 2025-06-24 | State Informal Action |
| 2025-04-25 | State Informal Action |
| 2025-03-28 | State Informal Enforcement |
| 2025-02-06 | State Informal Action |
| 2025-02-05 | State Informal Action |
| 2025-01-22 | State Order Extension |
| 2025-01-01 | State Informal Enforcement |
| 2024-09-27 | State Informal Action |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2025-08-09.
Coffman Cove vs. Nearby Alaska Cities
How Coffman Cove's water quality compares to similar cities in Alaska:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Coffman Cove | C | 23 | 1 | 199 |
| Chignik Lake | B | 49 | 1 | 200 |
| Chignik | D | 0 | 1 | 200 |
| Mekoryuk | A | 12 | 1 | 198 |
Common Questions About Coffman Cove Water
These are the most common questions residents search for about water quality in Coffman Cove, Alaska:
Is Coffman Cove water hard or soft? Water hardness varies by source. Coffman Cove's 1 water system uses a single source. Check your ZIP code report for specific hardness data.
Can I drink Coffman Cove tap water? Coffman Cove's water receives a grade of C (66/100). There are 9 health-based violations — consider filtration.
What is the best water filter for Coffman Cove? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Coffman Cove vs. Alaska Average
Understanding how Coffman Cove compares to the broader Alaska average helps contextualize your local water quality. Factors like water source, treatment methods, and infrastructure age all contribute to differences between cities in the same state.
To see how individual neighborhoods compare, check the ZIP code reports below — water quality can vary significantly even within Coffman Cove.
ZIP Codes in Coffman Cove
Coffman Cove spans 1 ZIP code. The ZIP with the lowest water quality score is 99918. Each ZIP code has its own water quality profile based on the specific water system serving that area. Check each ZIP code for detailed contaminant data, violation history, and system information.
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
- Enforcement: EPA ECHO database
- Filter recommendations: NSF/ANSI certified products
Updated daily.