Matanuska-Susitna County, Alaska
11 ZIP codes · Avg score 73/100 · Grade B · Updated 2026-06-03
Matanuska-Susitna County maintains reliable drinking water quality across all 11 of its tracked ZIP codes.
How Matanuska-Susitna County Compares
How Matanuska-Susitna County Compares
Matanuska-Susitna County scores 2 points below the Alaska state average (75/100) and 5 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Matanuska-Susitna County, Alaska
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 12.6 (asthma 10.7%, diabetes 9%)
Estimated additional annual cost per homeowner: $1,028, driven primarily by flood
Infrastructure: 0.409% avg pipe failure probability, 55% of ZIPs at high risk
37.2% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↓ Improving trendEPA violation counts by year across Matanuska-Susitna County water systems. Health-based shown in red, total in blue.
Peak year: 2022 with 7 violations. Past 5 years: 13 total (13 health-based). Health-based violations are declining versus the prior 2-year window.
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: $1,028
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
48,965 housing units in Matanuska-Susitna 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 Matanuska-Susitna County
Remediation costs are relatively manageable for most homeowners in Matanuska-Susitna 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 Matanuska-Susitna 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 Matanuska-Susitna County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Country Field Water Company | 1,166 | 68 |
| 2 | Wasilla Water System | 18,492 | 56 |
| 3 | Unified Alaskan Utilities Settlers Bay | 2,733 | 56 |
| 4 | Valley Utilities Llc | 1,590 | 56 |
| 5 | Victoria Estates | 912 | 56 |
16 total water systems serve Matanuska-Susitna County.
All ZIP Codes in Matanuska-Susitna County
11 ZIP codes tracked in Matanuska-Susitna County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 99683 | Trapper Creek | 83 | B | 0 | $205K |
| 2 | 99674 | Sutton | 82 | B | 3 | $223K |
| 3 | 99676 | Talkeetna | 78 | B | 0 | $247K |
| 4 | 99645 | Palmer | 77 | B | 3 | $338K |
| 5 | 99623 | Wasilla | 75 | B | 14 (8 health) | $295K |
| 6 | 99654 | Wasilla | 75 | B | 14 (8 health) | $342K |
| 7 | 99687 | Wasilla | 75 | B | 14 (8 health) | — |
| 8 | 99629 | Wasilla | 73 | B | 14 (8 health) | — |
| 9 | 99652 | Big Lake | 73 | B | 12 (8 health) | $280K |
| 10 | 99667 | Skwentna | 60 | C | 0 | $206K |
| 11 | 99688 | Willow | 52 | D | 0 | $267K |
Recommended Buyer Guides for Matanuska-Susitna County
Below: editorial picks, no sponsored placements.
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best Sump Pumps — Flood is the top compound risk factor
- Best Mold Test Kits — Flood-driven moisture and mold risk
Deep Dive Reports
Detailed analysis for Matanuska-Susitna County, Alaska
Overview
Matanuska-Susitna County in Alaska covers 11 ZIP codes with an average Home Safety Score of B (73/100).
7 of 11 ZIP codes have recorded EPA violations. 40 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.