Wahkiakum County, Washington
3 ZIP codes · Avg score 73/100 · Grade B · Updated 2026-06-04
EPA monitoring reports for Wahkiakum County cover 3 ZIP codes and tell a largely reassuring story — compliance rates are high and health-based violations are far below the national norm.
How Wahkiakum County Compares
How Wahkiakum County Compares
Wahkiakum County scores 5 points below the Washington state average (78/100) and 5 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-04
Key Risk Factors
Health risk index: 15.7 (asthma 11.5%, diabetes 14.7%)
Estimated additional annual cost per homeowner: $3,583, driven primarily by sea_level
Infrastructure: 0.49% avg pipe failure probability, 67% of ZIPs at high risk
67.3% of homes built before 1978 (lead paint era)
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: $3,583
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
1,794 housing units in Wahkiakum 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 Wahkiakum County
Remediation costs are relatively manageable for most homeowners in Wahkiakum 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 Wahkiakum County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 4 systems in Wahkiakum County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Cathlamet Water Department | 1,636 | 5 |
| 2 | Puget Island | 920 | 5 |
| 3 | Western Wahkiakum | 791 | 5 |
| 4 | Skamokawa Water System | 259 | 5 |
All ZIP Codes in Wahkiakum County
3 ZIP codes tracked in Wahkiakum County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 98612 | Cathlamet | 88 | A | 5 | $373K |
| 2 | 98621 | Grays River | 65 | C | 0 | — |
| 3 | 98647 | Skamokawa | 65 | C | 0 | $290K |
Recommended Buyer Guides for Wahkiakum County
Independent picks. EPA-grounded. Matched here.
- Best Lead Paint Test Kits — 67.3% of homes built before 1978
Overview
Wahkiakum County in Washington covers 3 ZIP codes with an average Home Safety Score of B (73/100).
1 of 3 ZIP codes have recorded EPA violations. All violations are monitoring/reporting type.
← Back to Washington 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.