Crook County, Wyoming
7 ZIP codes · Avg score 51/100 · Grade D · Updated 2026-06-03
Unlike better-scoring counties, Crook County records health-based violations across a meaningful portion of its 7 ZIP codes — the overall safety grade is well below average.
How Crook County Compares
How Crook County Compares
Crook County scores 4 points below the Wyoming state average (55/100) and 17 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Crook 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 (asthma 10.2%, diabetes 11.5%)
Estimated additional annual cost per homeowner: $411, driven primarily by wildfire
Infrastructure: 0.314% avg pipe failure probability
45% of homes built before 1978 (lead paint era)
Violation History (2021–2023)
→ Stable trendEPA violation counts by year across Crook County water systems. Health-based shown in red, total in blue.
Peak year: 2023 with 4 violations. Past 5 years: 6 total (6 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: $411
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
3,650 housing units in Crook 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 Crook County
Remediation costs are relatively manageable for most homeowners in Crook 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 Crook 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 Crook County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | BEULAH LAND WATER | 50 | 7 |
| 2 | MOORCROFT, TOWN OF | 1,009 | 2 |
| 3 | Buckmiller Enterprises, Llc | 33 | 2 |
| 4 | HULETT, TOWN OF | 420 | 0 |
| 5 | City of Sundance, | 1,279 | 0 |
6 total water systems serve Crook County.
All ZIP Codes in Crook County
7 ZIP codes tracked in Crook County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 82720 | Hulett | 66 | C | 0 | $268K |
| 2 | 82729 | Sundance | 66 | C | 0 | $283K |
| 3 | 82721 | Moorcroft | 61 | C | 2 (1 health) | $273K |
| 4 | 82712 | Beulah | 45 | D | 7 (2 health) | — |
| 5 | 82710 | Aladdin | 40 | D | 0 | $286K |
| 6 | 82711 | Alva | 40 | D | 0 | — |
| 7 | 82714 | Devils Tower | 40 | D | 0 | — |
Recommended Buyer Guides for Crook County
Editorial-only picks, screened against the EPA detections on file.
- 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 Crook County, Wyoming
Overview
Crook County in Wyoming covers 7 ZIP codes with an average Home Safety Score of D (51/100).
2 of 7 ZIP codes have recorded EPA violations. 3 health-based violations 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.
What You Can Do
Crook 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
45% of homes in this county were built before 1978. Older plumbing and solder can leach lead into drinking water, especially in the morning.