COUNTY REPORT WY

Johnson County, Wyoming

4 ZIP codes · Avg score 62/100 · Grade C

ZipCheckup grade for Johnson County: C.

A mixed picture - some signals here are worth your attention.

Johnson County: 4 ZIP codes, mid-range safety grade.

How Johnson County Compares

Johnson County62/100
Wyoming avg63/100
National avg73/100

How Johnson County Compares

C
County Grade
62/100
Avg Safety Score
4
ZIP Codes
1
Water Systems

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

C
County Grade
62
Avg Safety Score
4
ZIP Codes
Best ZIP: 82834 (62/100)
Lowest ZIP: 82834 (62/100)
$297K
Median Home Value
$600
Avg Remediation (0.20% of home value)

Key Risk Factors

Health risk index: 14.3 (asthma 10.2%, diabetes 13.1%)

Modeled additional annual cost estimate per homeowner: $505, largest modeled factor: Wildfire

43% of homes built before 1980 (lead paint was banned for residential use in 1978)

County Health Indicators vs National Average

Asthma 10.2% (national: 8.9%)
Diabetes 13.1% (national: 10.5%)
Obesity 35.6% (national: 32.4%)

Black markers indicate national averages. Source: CDC PLACES, Census ACS.

Infrastructure Overview

1984
Median Build Year
43%
Pre-1980 Housing
30/100
Infrastructure Stress Indicator
0%
ZIPs with High Infrastructure Stress
Low
Lead Pipe Risk

Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINSA infrastructure needs, EPA SDWIS violations, and EPA lead indicators.

Compound Risk Breakdown

Estimated additional annual cost per homeowner: $505

Wildfire $300/yr
Flood $200/yr
Water / Lead $150/yr

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

Pre-1940 13%
1940–1959 14%
1960–1979 16%
1980–1999 30%
2000+ 27%

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

$297K
Median Home Value
$600
Est. Remediation Cost
0.2%
of Home Value
Remediation as % of home value low burden

Modeled remediation costs in Johnson County can be compared with the median property value; actual costs vary by property.

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

Asthma 10.2% (US avg: 8.9%)
Diabetes 13.1% (US avg: 11%)
Obesity 35.6% (US avg: 32.4%)

Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.

Water systems mapped to Johnson County ZIP codes

1 community water system mapped to Johnson County ZIP codes; EPA may list more systems serving the county.

Systems with the most violations in Johnson County

1 water system with violations in EPA records.

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

Read the note next to each link: it gives the reason, such as a radon zone designation or housing age, that led to the recommendation.

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

Reporting periods vary by source. Missing data is shown as unavailable, not as zero.

Frequently Asked Questions

Is water safe in Johnson County?
Johnson County receives a grade of C. Some ZIP codes have recorded violations and residents in affected areas may want to test their water.
How many water systems serve Johnson County?
We map 1 public water system to the 4 ZIP codes of Johnson County. EPA may list more systems serving the county, so this is not a full count.
What is the biggest environmental risk in Johnson County?
In ZipCheckup's cost model, the factor with the largest estimated average annual cost in Johnson County is wildfire. Across all modeled risk factors, the estimated average additional annual cost is $505 per homeowner; actual costs vary by home.
How old are homes in Johnson County?
The median home build year in Johnson County is 1984. 43% of homes were built before 1980; homes built before 1978 may contain lead-based paint, and older homes may have older plumbing materials.
How does Johnson County compare to Wyoming?
Johnson County has an average Home Safety Score of 62/100 under model 4.0.0, which is below the Wyoming state average of 63/100.

How to cite this page

APA ZipCheckup. (2026). Johnson County, WY: HSS 62/100; 6 Health Violations. https://zipcheckup.com/county/wyoming/johnson/
BibTeX
@misc{zipcheckup-county-wyoming-johnson,
  author = {{ZipCheckup}},
  title  = {{Johnson County, WY: HSS 62/100; 6 Health Violations}},
  year   = {2026},
  url    = {https://zipcheckup.com/county/wyoming/johnson/}
}

Page version: October 2026.

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