Ferry County, Washington
6 ZIP codes · Avg score 54/100 · Grade D · Updated 2026-06-03
Poor compliance rates put Ferry County in the bottom safety tier — 6 ZIP codes, below the state average.
How Ferry County Compares
How Ferry County Compares
Ferry County scores 24 points below the Washington state average (78/100) and 14 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Ferry County, Washington
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 15.6 (asthma 12.2%, diabetes 14.8%)
Estimated additional annual cost per homeowner: $823, driven primarily by wildfire
Infrastructure: 0.32% avg pipe failure probability, 17% of ZIPs at high risk
40.5% of homes built before 1978 (lead paint era)
Violation History (2024–2025)
→ Stable trendEPA violation counts by year across Ferry County water systems. Health-based shown in red, total in blue.
Peak year: 2025 with 9 violations. Past 5 years: 15 total (15 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: $823
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
5,619 housing units in Ferry 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 Ferry County
Remediation costs are relatively manageable for most homeowners in Ferry 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 Ferry 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 Ferry County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | FOURTH OF JULY CREEK ESTATES | 29 | 35 |
| 2 | City of Republic | 1,673 | 10 |
| 3 | Curlew Conservation Center | 349 | 10 |
| 4 | Curlew Water & Sewer District | 316 | 10 |
| 5 | Orient Water Company | 167 | 10 |
7 total water systems serve Ferry County.
All ZIP Codes in Ferry County
6 ZIP codes tracked in Ferry County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 99141 | Kettle Falls | 70 | B | 1 | $283K |
| 2 | 99166 | Republic | 61 | C | 10 | $273K |
| 3 | 99121 | Danville | 53 | D | 0 | $421K |
| 4 | 99150 | Malo | 53 | D | 0 | $380K |
| 5 | 99118 | Curlew | 48 | D | 35 | $307K |
| 6 | 98859 | Wauconda | 40 | D | 0 | — |
Recommended Buyer Guides for Ferry County
Where county records show a lead exceedance or pre-1978 housing concentration, lead-specific filters and test kits move toward the top of the list.
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
- Best HEPA Air Purifiers for Wildfire Smoke — Wildfire is the top compound risk factor
Deep Dive Reports
Detailed analysis for Ferry County, Washington
Overview
Ferry County in Washington covers 6 ZIP codes with an average Home Safety Score of D (54/100).
3 of 6 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.
What You Can Do
Ferry County has a grade of D. Here are steps to protect your household.
Test your tap water
Order a certified lab test kit ($20-$50) to check for lead, bacteria, and other contaminants specific to your ZIP code.
Consider a certified water filter
NSF-certified filters can remove most common contaminants. Match the filter to your test results for best protection. Try our filter matcher
Contact your water utility
Request the latest Consumer Confidence Report (CCR) from your water provider. It details exactly what was found in your water supply.
Check for lead in your home
40.5% of homes in this county were built before 1978. Older plumbing and solder can leach lead into drinking water, especially in the morning.