Cowlitz County, Washington
11 ZIP codes · Avg score 98/100 · Grade A · Updated
ZipCheckup grade for Cowlitz County: A.
No federal data flags a major home-safety concern for this ZIP.
Tracking 11 ZIP codes in Cowlitz County shows a water safety record well above the national median - violations are isolated exceptions, not recurring patterns.
How Cowlitz County Compares
How Cowlitz County Compares
Cowlitz County scores 12 points above the Washington state average (86/100) and 25 points above the national average (73/100).
Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData Last verified:
ZIP Code Risk Map
Water Quality Map: Cowlitz County, Washington
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13.8 (asthma 12.3%, diabetes 11.4%)
Estimated additional annual cost per homeowner: $2,285, driven primarily by flood
54.7% 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
Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINS infrastructure needs, EPA SDWIS violations, and EPA lead indicators.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $2,285
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
47,105 housing units in Cowlitz 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 Cowlitz County
Remediation costs are relatively manageable for most homeowners in Cowlitz 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 Cowlitz County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Cowlitz County
8 community water systems serving Cowlitz County.
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Show all 8 water systems
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10 total water systems serve Cowlitz County.
Systems with the most violations in Cowlitz County
5 water systems with recorded EPA violations.
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All ZIP Codes in Cowlitz County
11 ZIP codes tracked in Cowlitz County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 98625 | Kalama | 99 | A | 3 | $442K |
| 2 | 98632 | Longview | 99 | A | 4 | $355K |
| 3 | 98611 | Castle Rock | 98 | A | 7 | $382K |
| 4 | 98626 | Kelso | 98 | A | 7 | $340K |
| 5 | 98674 | Woodland | 98 | A | 5 (1 health) | $481K |
| 6 | 98581 | Ryderwood | — | — | $200K | |
| 7 | 98603 | Ariel | — | — | $369K | |
| 8 | 98609 | Carrolls | — | — | — | |
| 9 | 98616 | Cougar | — | — | — | |
| 10 | 98645 | Silverlake | — | — | 3 | $467K |
| 11 | 98649 | Toutle | — | — | $287K |
Recommended Buyer Guides for Cowlitz County
If FEMA records flag flood-top-risk status or EPA samples show PFAS exceedances, the matching logic lifts emergency-water and PFAS-rated filtration into the recommendations - federal data drives the order, not retailer arrangements.
- Best Lead Paint Test Kits — 54.7% of homes built before 1978
- 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 Cowlitz County, Washington
Overview
Cowlitz County in Washington covers 11 tracked ZIP records with an average Home Safety Score of A (98/100) across 5 scored records.
6 of 6 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 1 health-based violation appear in the available health breakdown.
← Back to Washington Home Safety Profile
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- PFAS screening: EPA UCMR 5
- Radon zones: EPA Map of Radon Zones
- Air quality: EPA AirData annual AQI
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.