Johnson County, Wyoming
4 ZIP codes · Avg score 62/100 · Grade C · Updated
ZipCheckup grade for Johnson County: C.
A mixed picture - some signals here are worth your attention.
Water monitoring across Johnson County's 4 ZIP codes paints a mid-range picture - solid compliance in some zones, documented concerns in others; most violations on record are concentrated in specific prior years rather than spread evenly across the full compliance history, and the overall county grade has held steady in the middle tier without major shifts in either direction.
How Johnson County Compares
How Johnson County Compares
Johnson County scores 1 points below the Wyoming state average (63/100) and 11 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:
Key Risk Factors
Health risk index: 14.3 (asthma 10.2%, diabetes 13.1%)
Estimated additional annual cost per homeowner: $655, driven primarily by wildfire
33.7% of homes built before 1978 (lead paint era)
Violation History (2023–2024)
→ Stable trendEPA violation counts by year across Johnson County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 3 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: $655
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
4,556 housing units in Johnson 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 Johnson County
Remediation costs are relatively manageable for most homeowners in Johnson 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 Johnson County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Johnson County
1 community water system serving Johnson County.
- C
Systems with the most violations in Johnson County
1 water system with recorded EPA violations.
- C
All ZIP Codes in Johnson County
4 ZIP codes tracked in Johnson County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 82834 | Buffalo | 62 | C | 7 (6 health) | $297K |
| 2 | 82639 | Kaycee | — | — | $252K | |
| 3 | 82640 | Linch | — | — | $603K | |
| 4 | 82840 | Saddlestring | — | — | — |
Recommended Buyer Guides for Johnson County
Retailer arrangements don't shape what appears here - the selection logic is independent, filtered against EPA detections and the federal hazard data on file for this county.
- 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 HEPA Air Purifiers for Wildfire Smoke — Wildfire is the top compound risk factor
Overview
Johnson County in Wyoming covers 4 tracked ZIP records with an average Home Safety Score of C (62/100) across 1 scored records.
1 of 1 ZIP code with a reported violation count in the available EPA record have recorded EPA violations. 6 health-based violations appear in the available health breakdown.
← Back to Wyoming 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.