Okanogan County, Washington
19 ZIP codes · Avg score 67/100 · Grade C · Updated
ZipCheckup grade for Okanogan County: C.
A mixed picture - some signals here are worth your attention.
Tracking 19 ZIP codes in Okanogan County reveals a mixed picture - tap water quality varies meaningfully by location.
How Okanogan County Compares
How Okanogan County Compares
Okanogan County scores 19 points below the Washington state average (86/100) and 6 points below 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: Okanogan County, Washington
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.1 (asthma 11.6%, diabetes 13.3%)
Estimated additional annual cost per homeowner: $2,122, driven primarily by wildfire
52.7% of homes built before 1978 (lead paint era)
Violation History (2021–2022)
→ Stable trendEPA violation counts by year across Okanogan County water systems. Health-based shown in red, total in blue.
Peak year: 2021 with 3 violations. Past 5 years: 5 total (5 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: $2,122
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
22,373 housing units in Okanogan 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 Okanogan County
Remediation costs are relatively manageable for most homeowners in Okanogan 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 Okanogan County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Okanogan County
8 community water systems serving Okanogan County.
- C
- C
- C
Show all 8 water systems
- C
9 total water systems serve Okanogan County.
Systems with the most violations in Okanogan County
3 water systems with recorded EPA violations.
- C
All ZIP Codes in Okanogan County
19 ZIP codes tracked in Okanogan County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 98841 | Omak | 67 | C | 2 | $288K |
| 2 | 98812 | Brewster | — | — | 0 | $301K |
| 3 | 98814 | Carlton | — | — | $512K | |
| 4 | 98819 | Conconully | — | — | $216K | |
| 5 | 98827 | Loomis | — | — | 0 | — |
| 6 | 98829 | Malott | — | — | 3 (1 health) | $309K |
| 7 | 98833 | Mazama | — | — | $604K | |
| 8 | 98834 | Methow | — | — | $539K | |
| 9 | 98840 | Okanogan | — | — | 3 (1 health) | $252K |
| 10 | 98844 | Oroville | — | — | 0 | $251K |
| 11 | 98846 | Pateros | — | — | 7 | $315K |
| 12 | 98849 | Riverside | — | — | $242K | |
| 13 | 98855 | Tonasket | — | — | 0 | $230K |
| 14 | 98856 | Twisp | — | — | $398K | |
| 15 | 98859 | Wauconda | — | — | — | |
| 16 | 98862 | Winthrop | — | — | $695K | |
| 17 | 99116 | Coulee Dam | — | — | $213K | |
| 18 | 99124 | Elmer City | — | — | $185K | |
| 19 | 99155 | Nespelem | — | — | $137K |
Recommended Buyer Guides for Okanogan County
Editorial methodology pairs each documented risk in this county with the buyer category that addresses it, drawing on water-quality detections, housing-stock lead exposure, EPA Radon Zone designation, and FEMA flood and wildfire ratings. NSF-certified options surface where applicable, and products that match the specific contaminant take priority.
- Best Lead Paint Test Kits — 52.7% of homes built before 1978
- 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 Okanogan County, Washington
Overview
Okanogan County in Washington covers 19 tracked ZIP records with an average Home Safety Score of C (67/100) across 1 scored records.
4 of 8 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.