Old Harbor
EPA ID: AK2250061 · 246 people served · 1 ZIP code
Where compliant utilities carry no open actions, Old Harbor shows 19 active EPA violations in the federal database for a service population of approximately 246.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Worsening · Risk tier: High · 95% chance of violation in next 12 months
Violations went from 11 (2024) to 4 (2025). The pattern suggests growing compliance challenges.
Service Area Map
Coverage area for Old Harbor Source: EPA SDWIS service area boundaries.
Service area boundary — Grade D
Service Area Demographics
The Old Harbor serves a community with a median household income of $31,250 and an estimated 186 residents across its service area. Approximately 73% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
🌊 Where Does Your Water Come From?
Old Harbor's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
About 2% of homes in Kodiak Island Borough, 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 Old Harbor compares to EPA limits
What This Means For You
E. coli at 34 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 15 mg/L exceeds the EPA maximum of mg/L.
Revised Total Coliform Rule at 8 presence exceeds the EPA maximum of presence.
Stage 1 DBP Rule at 6 mg/L exceeds the EPA maximum of mg/L.
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
Old Harbor (EPA ID: AK2250061) is a community water system in Alaska that serves approximately 246 people from surface water sources.
This system serves ZIP code 99643 in Old Harbor.
Average Home Safety Score: D (43/100)
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 |
|---|---|---|---|
| August 1, 2025 | E. coli | Health-based | Unresolved |
| June 1, 2025 | Consumer Confidence Report Rule | Monitoring | Resolved |
| June 1, 2025 | Revised Total Coliform Rule | Monitoring | Resolved |
| April 1, 2025 | Consumer Confidence Report Rule | Monitoring | Resolved |
| April 1, 2025 | E. coli | Monitoring | Resolved |
| April 1, 2025 | Revised Total Coliform Rule | Monitoring | Resolved |
| March 1, 2025 | E. coli | Monitoring | Resolved |
| February 1, 2025 | E. coli | Monitoring | Resolved |
| February 1, 2025 | E. coli | Health-based | Resolved |
| January 1, 2025 | E. coli | Health-based | Resolved |
| December 1, 2024 | Revised Total Coliform Rule | Monitoring | Resolved |
| December 1, 2024 | Consumer Confidence Report Rule | Monitoring | Resolved |
| December 1, 2024 | E. coli | Health-based | Resolved |
| December 1, 2024 | E. coli | Monitoring | Resolved |
| November 1, 2024 | E. coli | Monitoring | Resolved |
| November 1, 2024 | E. coli | Health-based | Resolved |
| October 26, 2024 | Lead and Copper Rule | Monitoring | Resolved |
| October 1, 2024 | E. coli | Health-based | Resolved |
| September 1, 2024 | E. coli | Health-based | Resolved |
| August 1, 2024 | E. coli | Health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| E. coli | Microbiological | 34 | Yes |
| Consumer Confidence Report Rule | Reporting Failure | 15 | No |
| Revised Total Coliform Rule | Microbiological | 8 | No |
| Stage 1 DBP Rule | Treatment Failure | 6 | No |
| Total Organic Carbon | Disinfection Byproducts | 3 | No |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 2 | No |
| Surface Water Treatment Rule | Treatment Failure | 1 | No |
| Lead and Copper Rule | Treatment Failure | 1 | 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 |
|---|---|---|---|
| 99643 | 0.012 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
- 99643 — Old Harbor
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Old Harbor (AK2250061) on EPA.gov.
Frequently Asked Questions
Is Old Harbor water safe to drink?
Old Harbor has recorded 17 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 Old Harbor serve?
Old Harbor serves approximately 246 people across 1 ZIP code in Alaska.
Where does Old Harbor get its water?
The primary water source is surface water.
Water Source & Treatment
Where this water originates and how it's treated before reaching your tap.
Source: OLD HARBOR 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
Old Harbor (EPA ID: AK2250061) — request the latest Consumer Confidence Report or ask about specific contaminants.