Kodiak Island County, Alaska
8 ZIP codes · Avg score 89/100 · Grade A · Updated 2026-06-04
EPA monitoring reports for Kodiak Island County cover 8 ZIP codes and tell a largely reassuring story — compliance rates are high and health-based violations are far below the national norm.
How Kodiak Island County Compares
How Kodiak Island County Compares
Kodiak Island County scores 14 points above the Alaska state average (75/100) and 21 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-04
ZIP Code Risk Map
Water Quality Map: Kodiak Island County, Alaska
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 11.3 (asthma 9.3%, diabetes 9.8%)
Estimated additional annual cost per homeowner: $816, driven primarily by sea_level
Infrastructure: 0.5% avg pipe failure probability, 50% of ZIPs at high risk
68.2% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Kodiak Island County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 14 violations. Past 5 years: 28 total (28 health-based). Health-based violations are rising versus the prior 2-year window — worth closer monitoring.
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $816
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
5,778 housing units in Kodiak Island County
Source: U.S. Census Bureau ACS B25034 (Year Structure Built).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Kodiak Island County
Remediation costs are relatively manageable for most homeowners in Kodiak Island County, representing a small fraction of property value.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Health Outcomes vs National Average
CDC PLACES data for Kodiak Island County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 5 systems in Kodiak Island County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Old Harbor | 246 | 70 |
| 2 | Kodiak Water System | 9,547 | 30 |
| 3 | Uscg Station Kodiak | 3,092 | 30 |
| 4 | Port Lions | 175 | 28 |
| 5 | Larsen Bay Water System | 271 | 17 |
7 total water systems serve Kodiak Island County.
All ZIP Codes in Kodiak Island County
8 ZIP codes tracked in Kodiak Island County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 99615 | Kodiak | 98 | A | 10 (1 health) | $401K |
| 2 | 99619 | Kodiak | 98 | A | 10 (1 health) | — |
| 3 | 99624 | Larsen Bay | 98 | A | 17 (1 health) | $114K |
| 4 | 99697 | Kodiak | 98 | A | 10 (1 health) | — |
| 5 | 99644 | Ouzinkie | 97 | A | 6 (2 health) | $113K |
| 6 | 99608 | Karluk | 94 | A | 4 | — |
| 7 | 99550 | Port Lions | 83 | B | 28 (7 health) | $189K |
| 8 | 99643 | Old Harbor | 43 | D | 70 (17 health) | $95K |
Recommended Buyer Guides for Kodiak Island County
Editorial-only picks, screened against the EPA detections on file.
- Best Lead Paint Test Kits — 68.2% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for Kodiak Island County, Alaska
Overview
Kodiak Island County in Alaska covers 8 ZIP codes with an average Home Safety Score of A (89/100).
8 of 8 ZIP codes have recorded EPA violations. 30 health-based violations have been documented.
← Back to Alaska water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.