Weston County, Wyoming
4 ZIP codes · Avg score 73/100 · Grade B · Updated 2026-06-03
Based on current EPA data, Weston County's 4 ZIP codes maintain an above-average drinking water safety record.
How Weston County Compares
How Weston County Compares
Weston County scores 18 points above the Wyoming state average (55/100) and 5 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
Key Risk Factors
Health risk index: 13.7 (asthma 9.9%, diabetes 12.6%)
Estimated additional annual cost per homeowner: $493, driven primarily by wildfire
Infrastructure: 0.323% avg pipe failure probability
47% of homes built before 1978 (lead paint era)
Violation History (2023–2024)
→ Stable trendEPA violation counts by year across Weston County water systems. Health-based shown in red, total in blue.
Peak year: 2023 with 2 violations. Past 5 years: 3 total (3 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: $493
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
3,433 housing units in Weston 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 Weston County
Remediation costs are relatively manageable for most homeowners in Weston 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 Weston 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 Weston County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | City of Newcastle, | 3,595 | 8 |
| 2 | Salt Creek Water District | 600 | 8 |
| 3 | West End Water District | 225 | 8 |
| 4 | Cambria I&s District | 148 | 8 |
| 5 | Water Unlimited, Incorporated | 144 | 8 |
7 total water systems serve Weston County.
All ZIP Codes in Weston County
4 ZIP codes tracked in Weston County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 82730 | Upton | 83 | B | 0 | $200K |
| 2 | 82723 | Osage | 82 | B | 6 (1 health) | — |
| 3 | 82701 | Newcastle | 72 | B | 8 | $218K |
| 4 | 82715 | Four Corners | 53 | D | 0 | — |
Recommended Buyer Guides for Weston 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 HEPA Air Purifiers for Wildfire Smoke — Wildfire is the top compound risk factor
Overview
Weston County in Wyoming covers 4 ZIP codes with an average Home Safety Score of B (73/100).
2 of 4 ZIP codes have recorded EPA violations. 1 health-based violation have been documented.
← Back to Wyoming 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.