Fremont County, Wyoming
13 ZIP codes · Avg score 43/100 · Grade D · Updated
ZipCheckup grade for Fremont County: D.
Several federal signals point to home-safety risks in this ZIP.
Your top priority: see the breakdown below and consider a certified water filter. NSF certified filters →
Within Fremont County's 13 monitored ZIP codes, water quality data indicates below-average safety - independent testing is a reasonable precaution.
How Fremont County Compares
How Fremont County Compares
Fremont County scores 20 points below the Wyoming state average (63/100) and 30 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: Fremont County, Wyoming
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13.6 (asthma 10.9%, diabetes 12.4%)
Estimated additional annual cost per homeowner: $842, driven primarily by wildfire
68.2% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↓ Improving trendEPA violation counts by year across Fremont County water systems. Health-based shown in red, total in blue.
Peak year: 2023 with 4 violations. Past 5 years: 9 total (9 health-based). Health-based violations are declining versus the prior 2-year window.
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: $842
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
17,445 housing units in Fremont 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 Fremont County
Remediation costs are relatively manageable for most homeowners in Fremont 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 Fremont County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Fremont County
6 community water systems serving Fremont County.
- F
- D
- F
- F
- F
- D
Systems with the most violations in Fremont County
5 water systems with recorded EPA violations.
- F
- F
- F
- F
- D
All ZIP Codes in Fremont County
13 ZIP codes tracked in Fremont County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 82520 | Lander | 49 | D | 1 (1 health) | $318K |
| 2 | 82501 | Riverton | 36 | F | 88 (5 health) | $226K |
| 3 | 82310 | Jeffrey City | — | — | — | |
| 4 | 82510 | Arapahoe | — | — | $178K | |
| 5 | 82512 | Crowheart | — | — | — | |
| 6 | 82513 | Dubois | — | — | $362K | |
| 7 | 82514 | Fort Washakie | — | — | $95K | |
| 8 | 82515 | Hudson | — | — | $188K | |
| 9 | 82516 | Kinnear | — | — | $136K | |
| 10 | 82523 | Pavillion | — | — | $226K | |
| 11 | 82524 | Saint Stephens | — | — | — | |
| 12 | 82642 | Lysite | — | — | $417K | |
| 13 | 82649 | Shoshoni | — | — | $154K |
Recommended Buyer Guides for Fremont County
Filtered against federal data, fitted to local risks.
- Best Water Filters for PFAS — PFAS detected in 1 ZIP code
- Best Lead Paint Test Kits — 68.2% of homes built before 1978
- 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
Deep Dive Reports
Detailed analysis for Fremont County, Wyoming
Overview
Fremont County in Wyoming covers 13 tracked ZIP records with an average Home Safety Score of D (43/100) across 2 scored records.
2 of 2 ZIP codes 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.
What You Can Do
Fremont 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
68.2% of homes in this county were built before 1978. Older plumbing and solder can leach lead into drinking water, especially in the morning.