Unalakleet City Water Supply
EPA ID: AK2340387 · 757 people served · 1 ZIP code
Tallying the federal enforcement file for Unalakleet City Water Supply yields 13 open violations that have not been formally closed — each finding sits in the EPA database while the utility continues to deliver water to approximately 757 residents and works through the required corrective action process.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Stable · Risk tier: High · 95% chance of violation in next 12 months
Violations went from 1 (2021) to 3 (2024). Violation counts have remained relatively steady.
Service Area Map
Coverage area for Unalakleet City Water Supply Source: EPA SDWIS service area boundaries.
Service area boundary — Grade F
Service Area Demographics
The Unalakleet City Water Supply serves a community with a median household income of $100,625 and an estimated 821 residents across its service area. Approximately 59% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 50% of the population in this service area is classified as disadvantaged under EPA's EJScreen criteria. Communities with higher disadvantaged populations often face disproportionate environmental and health burdens, including aging water infrastructure and limited resources for remediation.
💧 Where Does Your Water Come From?
Unalakleet City Water Supply's water is pumped from underground aquifers. 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.
About 27% of homes in Nome Census Area, Alaska rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Infrastructure Risk
Detected Contaminants
How Unalakleet City Water Supply compares to EPA limits
What This Means For You
Fecal Coliform at 46 presence exceeds the EPA maximum of presence.
E. coli at 28 Zero tolerance (any positive sample triggers immediate action) exceeds the EPA maximum of Zero tolerance (any positive sample triggers immediate action). Severe GI illness; potentially fatal kidney failure in children. Consider UV disinfection (99.99%) filtration.
Total Trihalomethanes (TTHM) at 2 mg/L exceeds the EPA maximum of 0.08 mg/L. Bladder & rectal cancer risk; reproductive concerns. Consider granular activated carbon (GAC) filtration.
Consumer Confidence Report Rule at 17 mg/L exceeds the EPA maximum of mg/L.
Revised Total Coliform Rule at 11 presence exceeds the EPA maximum of presence.
E. coli was detected in this water system. UV disinfection (99.99%) filtration can reduce exposure.
Find a certified water filter →Comparable Water Systems
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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
Unalakleet City Water Supply (EPA ID: AK2340387) is a community water system in Alaska that serves approximately 757 people from groundwater sources.
This system serves ZIP code 99684 in Unalakleet.
Average Home Safety Score: F (36/100)
Based on water quality violations, lead levels, and radon risk across all ZIP codes served by this system.
Violation History
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| June 1, 2025 | Revised Total Coliform Rule | Monitoring | Resolved |
| June 1, 2025 | Consumer Confidence Report Rule | Monitoring | Resolved |
| April 1, 2024 | Fecal Coliform | Health-based | Resolved |
| March 1, 2024 | Fecal Coliform | Monitoring | Unresolved |
| February 1, 2024 | Fecal Coliform | Health-based | Unresolved |
| January 1, 2024 | E. coli | Monitoring | Resolved |
| January 1, 2024 | Fecal Coliform | Health-based | Unresolved |
| January 1, 2024 | Revised Total Coliform Rule | Monitoring | Resolved |
| January 1, 2024 | Consumer Confidence Report Rule | Monitoring | Resolved |
| September 1, 2023 | Fecal Coliform | Monitoring | Resolved |
| August 1, 2023 | Consumer Confidence Report Rule | Monitoring | Resolved |
| August 1, 2023 | E. coli | Monitoring | Resolved |
| July 1, 2023 | Stage 1 DBP Rule | Monitoring | Resolved |
| July 1, 2023 | Fecal Coliform | Monitoring | Resolved |
| July 1, 2023 | E. coli | Monitoring | Resolved |
| July 1, 2023 | Revised Total Coliform Rule | Monitoring | Resolved |
| June 1, 2023 | Fecal Coliform | Monitoring | Resolved |
| May 1, 2023 | Consumer Confidence Report Rule | Monitoring | Resolved |
| May 1, 2023 | E. coli | Monitoring | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Fecal Coliform | Microbiological | 46 | Yes |
| E. coli | Microbiological | 28 | Yes |
| Consumer Confidence Report Rule | Reporting Failure | 17 | No |
| Revised Total Coliform Rule | Microbiological | 11 | No |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 2 | No |
| Stage 1 DBP Rule | Treatment Failure | 2 | No |
Health Risk Details
E. coli (EPA limit: Zero tolerance (any positive sample triggers immediate action))
Severe GI illness; potentially fatal kidney failure in children At-risk groups: children under 5, elderly, immunocompromised individuals, pregnant women.
Removal methods: UV disinfection (99.99%), chlorination, reverse osmosis. Find the right filter →
Lead & Copper
EPA Lead and Copper Rule sampling data for ZIP codes served by this system:
| ZIP Code | Lead Level | Exceeds Limit | Sample Date |
|---|---|---|---|
| 99684 | 0.014 mg/L | No | N/A |
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 3 (Low Risk)
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: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
ZIP Codes Served
- 99684 — Unalakleet
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Unalakleet City Water Supply (AK2340387) on EPA.gov.
Frequently Asked Questions
Is Unalakleet City Water Supply water safe to drink?
Unalakleet City Water Supply has recorded 31 health-based violations in the past 5 years. While the system is required to treat water to meet federal standards, you may want to consider additional precautions such as a certified water filter.
How many people does Unalakleet City Water Supply serve?
Unalakleet City Water Supply serves approximately 757 people across 1 ZIP code in Alaska.
Where does Unalakleet City Water Supply get its water?
The primary water source is groundwater.
Water Source & Treatment
Where this water originates and how it's treated before reaching your tap.
Source: Unalakleet City Water Supply Consumer Confidence Report.
ZipCheckup is not affiliated with this water utility. Treatment and source data are sourced from the utility's published CCR filings.
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
This system reports zero confirmed lead service lines in its inventory. Unknown-material counts may still warrant verification.
Federal LCRI rule (effective October 2024) requires every public water system to inventory its service lines and complete lead-line replacement within 10 years.
Source: EPA SDWIS Federal Service Line Inventory (Phase 2) · Submitted 2026
ZipCheckup is not affiliated with the utility or state agency. Inventory figures render verbatim from the public LCRI submission cited above; ZipCheckup does not perform inspections or replacements.
Frequently Asked Questions
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
Unalakleet City Water Supply (EPA ID: AK2340387) — request the latest Consumer Confidence Report or ask about specific contaminants.