Kenai Peninsula County, Alaska
13 ZIP codes · Avg score 67/100 · Grade C · Updated 2026-06-04
Across Kenai Peninsula County, EPA compliance data for 13 ZIP codes sits at a moderate level — not alarming, but not uniformly clean either.
How Kenai Peninsula County Compares
How Kenai Peninsula County Compares
Kenai Peninsula County scores 8 points below the Alaska state average (75/100) and 1 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-04
ZIP Code Risk Map
Water Quality Map: Kenai Peninsula County, Alaska
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 12.9 (asthma 10.3%, diabetes 9.8%)
Estimated additional annual cost per homeowner: $995, driven primarily by sea_level
Infrastructure: 0.445% avg pipe failure probability, 62% of ZIPs at high risk
48.2% of homes built before 1978 (lead paint era)
Violation History (2022–2025)
↑ Worsening trendEPA violation counts by year across Kenai Peninsula County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 15 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: $995
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
32,049 housing units in Kenai Peninsula 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 Kenai Peninsula County
Remediation costs are relatively manageable for most homeowners in Kenai Peninsula 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 Kenai Peninsula 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 Kenai Peninsula County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Salmon Creek Trailer Court | 125 | 154 |
| 2 | Highland Pride Mobile Home Park | 100 | 134 |
| 3 | SOLDOTNA | 4,807 | 103 |
| 4 | Kb Sub. Water Service Assoc. | 170 | 103 |
| 5 | College Park Home Owners Assoc | 85 | 103 |
22 total water systems serve Kenai Peninsula County.
All ZIP Codes in Kenai Peninsula County
13 ZIP codes tracked in Kenai Peninsula County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 99635 | Nikiski | 82 | B | 4 (1 health) | — |
| 2 | 99611 | Kenai | 79 | B | 31 (1 health) | $280K |
| 3 | 99556 | Anchor Point | 78 | B | 3 | $227K |
| 4 | 99603 | Homer | 78 | B | 11 | $346K |
| 5 | 99682 | Tyonek | 78 | B | 11 | $46K |
| 6 | 99663 | Seldovia | 72 | B | 22 (3 health) | $197K |
| 7 | 99672 | Sterling | 70 | B | 19 (2 health) | $313K |
| 8 | 99664 | Seward | 66 | C | 51 (3 health) | $336K |
| 9 | 99572 | Cooper Landing | 60 | C | 0 | $405K |
| 10 | 99639 | Ninilchik | 60 | C | 0 | $245K |
| 11 | 99669 | Soldotna | 53 | D | 103 (21 health) | $304K |
| 12 | 99568 | Clam Gulch | 50 | D | 0 | $261K |
| 13 | 99610 | Kasilof | 50 | D | 0 | $246K |
Recommended Buyer Guides for Kenai Peninsula County
Eight risk categories drive the selection — PFAS exceedance, lead above EPA action level, pre-1978 housing share, EPA Radon Zone 1, flood-top-risk, wildfire-top-risk, multi-contaminant load, and a baseline fallback — and each category maps to a specific buyer-guide track that surfaces when the county data hits its threshold for that hazard signal.
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for Kenai Peninsula County, Alaska
Overview
Kenai Peninsula County in Alaska covers 13 ZIP codes with an average Home Safety Score of C (67/100).
9 of 13 ZIP codes have recorded EPA violations. 31 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.