Lewis County, Washington
23 ZIP codes · Avg score 88/100 · Grade A · Updated
ZipCheckup grade for Lewis County: A.
No federal data flags a major home-safety concern for this ZIP.
In current tracking cycles, Lewis County - spanning 23 ZIP codes - records above-average water quality outcomes; the county's compliance history over recent years shows few departures from federal standards.
How Lewis County Compares
How Lewis County Compares
Lewis County scores 2 points above the Washington state average (86/100) and 15 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: Lewis County, Washington
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13.9 (asthma 11.3%, diabetes 12.1%)
Estimated additional annual cost per homeowner: $3,237, driven primarily by sea_level
63.9% of homes built before 1978 (lead paint era)
Violation History (2021–2024)
→ Stable trendEPA violation counts by year across Lewis County water systems. Health-based shown in red, total in blue.
Peak year: 2021 with 2 violations. Past 5 years: 4 total (4 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
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: $3,237
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
36,824 housing units in Lewis 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 Lewis County
Remediation costs are relatively manageable for most homeowners in Lewis 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 Lewis County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Lewis County
8 community water systems serving Lewis County.
- A
- A
- B
- A
Show all 8 water systems
- A
- B
12 total water systems serve Lewis County.
Systems with the most violations in Lewis County
5 water systems with recorded EPA violations.
- B
- A
- A
All ZIP Codes in Lewis County
23 ZIP codes tracked in Lewis County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 98532 | Chehalis | 96 | A | 25 | $382K |
| 2 | 98531 | Centralia | 80 | B | 10 | $286K |
| 3 | 98304 | Ashford | — | — | 2 | $241K |
| 4 | 98336 | Glenoma | — | — | $245K | |
| 5 | 98355 | Mineral | — | — | $413K | |
| 6 | 98356 | Morton | — | — | $281K | |
| 7 | 98361 | Packwood | — | — | $266K | |
| 8 | 98377 | Randle | — | — | $425K | |
| 9 | 98522 | Adna | — | — | — | |
| 10 | 98533 | Cinebar | — | — | $352K | |
| 11 | 98538 | Curtis | — | — | 0 | $398K |
| 12 | 98539 | Doty | — | — | — | |
| 13 | 98542 | Ethel | — | — | $416K | |
| 14 | 98544 | Galvin | — | — | 1 | — |
| 15 | 98564 | Mossyrock | — | — | $214K | |
| 16 | 98565 | Napavine | — | — | $276K | |
| 17 | 98570 | Onalaska | — | — | 2 | $352K |
| 18 | 98572 | Pe Ell | — | — | 0 | $218K |
| 19 | 98582 | Salkum | — | — | — | |
| 20 | 98585 | Silver Creek | — | — | $376K | |
| 21 | 98591 | Toledo | — | — | 1 | $405K |
| 22 | 98593 | Vader | — | — | 0 | $338K |
| 23 | 98596 | Winlock | — | — | 17 | $365K |
Recommended Buyer Guides for Lewis County
Below: editorial picks, no sponsored placements.
- Best Lead Paint Test Kits — 63.9% of homes built before 1978
Deep Dive Reports
Detailed analysis for Lewis County, Washington
Overview
Lewis County in Washington covers 23 tracked ZIP records with an average Home Safety Score of A (88/100) across 2 scored records.
7 of 10 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. The available record reports no health-based violations for this measured scope.
← 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.