Dillingham County, Alaska
9 ZIP codes · Avg score 79/100 · Grade B · Updated 2026-06-03
Dillingham County's tap water quality puts it in the upper tier nationally; the 9 ZIP codes here record few health-based violations.
How Dillingham County Compares
How Dillingham County Compares
Dillingham County scores 4 points above the Alaska state average (75/100) and 11 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Dillingham County, Alaska
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.8 (asthma 12.7%, diabetes 13.2%)
Estimated additional annual cost per homeowner: $334, driven primarily by energy_code_gap
Infrastructure: 0.437% avg pipe failure probability, 44% of ZIPs at high risk
48.3% of homes built before 1978 (lead paint era)
Violation History (2023–2024)
→ Stable trendEPA violation counts by year across Dillingham County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 10 violations. Past 5 years: 13 total (13 health-based).
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: $334
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
3,284 housing units in Dillingham 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 Dillingham County
Remediation costs are relatively manageable for most homeowners in Dillingham 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 Dillingham 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 Dillingham County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Manokotak Water System | 293 | 41 |
| 2 | Manokotak Heights W/s | 215 | 41 |
| 3 | NEW STUYAHOK WATER SYSTEM | 566 | 28 |
| 4 | DILLINGHAM WATER SYSTEM | 2,419 | 25 |
| 5 | Bbahc - Kanakanak Hospital | 305 | 25 |
10 total water systems serve Dillingham County.
All ZIP Codes in Dillingham County
9 ZIP codes tracked in Dillingham County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 99505 | Jber | 99 | A | 0 | — |
| 2 | 99576 | Dillingham | 98 | A | 25 (1 health) | $284K |
| 3 | 99636 | New Stuyahok | 98 | A | 28 (1 health) | $108K |
| 4 | 99678 | Togiak | 98 | A | 2 | $103K |
| 5 | 99628 | Manokotak | 89 | A | 41 (5 health) | $86K |
| 6 | 99569 | Clarks Point | 80 | B | 24 (2 health) | — |
| 7 | 99555 | Aleknagik | 50 | D | 0 | $84K |
| 8 | 99580 | Ekwok | 50 | D | 0 | — |
| 9 | 99625 | Levelock | 50 | D | 0 | — |
Recommended Buyer Guides for Dillingham County
Below: editorial picks, no sponsored placements.
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for Dillingham County, Alaska
Overview
Dillingham County in Alaska covers 9 ZIP codes with an average Home Safety Score of B (79/100).
5 of 9 ZIP codes have recorded EPA violations. 9 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.