Clark County, Washington
24 ZIP codes · Avg score 63/100 · Grade C · Updated 2026-06-03
Within Clark County, safety data across 24 ZIP codes suggests a fair but uneven system — violations are present and worth checking at the ZIP level.
How Clark County Compares
How Clark County Compares
Clark County scores 15 points below the Washington state average (78/100) and 5 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Clark County, Washington
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 12 (asthma 11.6%, diabetes 9.8%)
Estimated additional annual cost per homeowner: $911, driven primarily by flood
Infrastructure: 0.316% avg pipe failure probability, 17% of ZIPs at high risk
43.4% 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: $911
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
188,578 housing units in Clark 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 Clark County
Remediation costs are relatively manageable for most homeowners in Clark 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 Clark 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 Clark County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Clark Public Utilities | 116,876 | 39 |
| 2 | Yacolt | 3,034 | 36 |
| 3 | City of Vancouver | 373,047 | 30 |
| 4 | Vista Del Rio Mobile Home Park | 352 | 30 |
| 5 | Amboy Clark Public Utilities | 991 | 28 |
12 total water systems serve Clark County.
All ZIP Codes in Clark County
24 ZIP codes tracked in Clark County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 98642 | Ridgefield | 70 | B | 1 | $623K |
| 2 | 98660 | Vancouver | 69 | C | 2 (1 health) | $444K |
| 3 | 98661 | Vancouver | 69 | C | 2 (1 health) | $425K |
| 4 | 98662 | Vancouver | 69 | C | 2 (1 health) | $424K |
| 5 | 98663 | Vancouver | 69 | C | 2 (1 health) | $431K |
| 6 | 98664 | Vancouver | 69 | C | 2 (1 health) | $442K |
| 7 | 98665 | Vancouver | 69 | C | 2 (1 health) | $448K |
| 8 | 98666 | Vancouver | 69 | C | 2 (1 health) | — |
| 9 | 98682 | Vancouver | 69 | C | 2 (1 health) | $442K |
| 10 | 98683 | Vancouver | 69 | C | 2 (1 health) | $502K |
| 11 | 98684 | Vancouver | 69 | C | 2 (1 health) | $442K |
| 12 | 98685 | Vancouver | 69 | C | 2 (1 health) | $573K |
| 13 | 98686 | Vancouver | 69 | C | 2 (1 health) | $546K |
| 14 | 98675 | Yacolt | 67 | C | 6 | $523K |
| 15 | 98668 | Vancouver | 65 | C | 2 (1 health) | — |
| 16 | 98687 | Vancouver | 65 | C | 2 (1 health) | — |
| 17 | 98604 | Battle Ground | 64 | C | 2 | $544K |
| 18 | 98607 | Camas | 63 | C | 2 | $649K |
| 19 | 98606 | Brush Prairie | 53 | D | 0 | $677K |
| 20 | 98622 | Heisson | 53 | D | 0 | — |
| 21 | 98629 | La Center | 53 | D | 0 | $569K |
| 22 | 98601 | Amboy | 40 | D | 0 | $517K |
| 23 | 98603 | Ariel | 40 | D | 0 | $369K |
| 24 | 98616 | Cougar | 40 | D | 0 | — |
Recommended Buyer Guides for Clark County
While many sites publish identical guide lists across every county they cover, the selection here changes by location — driven by the EPA, NSF, FEMA, and CDC datasets that describe the actual conditions documented for this jurisdiction in the federal record.
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
- 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 Clark County, Washington
Overview
Clark County in Washington covers 24 ZIP codes with an average Home Safety Score of C (63/100).
18 of 24 ZIP codes have recorded EPA violations. 14 health-based violations have been documented.
← 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.