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Crook, WY

Low Risk (12/100)

Transparent derived index from EPA TRI / SDWIS / Superfund extracts: not an official EPA rating. Fixed caps: facilities ≤25 pts (50+ = max), log10 releases ≤25 pts, Superfund ≤25 pts (5/site), health-violation systems ≤15 pts (3/system), high-chemical facilities ≤10 pts. Bands: High ≥60, Moderate ≥30. See methodology.

Environmental data for Crook in Wyoming · Population: 7,339

SDWIS systems such as SUNDANCE, CITY OF; MOORCROFT, TOWN OF; HULETT, TOWN OF anchor Crook, WY's EPA extract. Derived burden score 12/100 (Low Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.

No TRI Form R facilities sit in Crook in this extract; water coverage still lists SUNDANCE, CITY OF; MOORCROFT, TOWN OF; HULETT, TOWN OF. No AQS county monitors report here.

Burden score 12/100 (Low Risk) is the only weighted composite on this page. The tables below list every TRI facility, SDWIS system, and Superfund site EPA has on record for Crook -- not just the names called out above -- reproducing the disclosure history as filed, not a current-safety verdict. Extract current as of 2026-08-25.

County population (Census ACS)
7,339
TRI Facilities
0
Water Systems
5
Superfund Sites
0
Total Releases
0 lbs

Water Systems (5)

System System pop (SDWIS) Violations
SUNDANCE, CITY OF 1,279 1
MOORCROFT, TOWN OF 1,009 2
HULETT, TOWN OF 420 0
RIMROCK WATER COMPANY LLC 365 7
RED WATER DISTRIBUTION LLC 35 9

Cities in Crook (4)

Aladdin
0 facilities · 2 water
Hulett
0 facilities · 1 water
Moorcroft
0 facilities · 1 water
Sundance
0 facilities · 1 water

Frequently Asked Questions

What is the environmental risk level in Crook, Wyoming? ▼
Crook, WY has an environmental risk score of 12/100 (Low Risk), based on 0 TRI facilities, 0 Superfund sites, and 5 water systems on record. 4 water systems have health-based violations. Source: EPA TRI, SDWIS, and Superfund NPL.
Are there Superfund sites in Crook? ▼
No Superfund National Priorities List (NPL) sites are currently registered in Crook, WY in the EPA database.
How many toxic release facilities are in Crook? ▼
Crook, WY has 0 TRI-reporting facilities on record with the EPA Toxic Release Inventory. TRI facilities self-report annual chemical release data to the EPA.
What is the air quality in Crook? ▼
Air quality monitoring data (EPA AQS) is not available for Crook, WY. This may indicate no EPA monitoring stations are located in the county. For regional air quality data, see the state environmental profile or visit EPA's AirNow.gov.
Is the drinking water safe in Crook? ▼
Crook, WY has 5 EPA-regulated water systems. 4 systems have reported health-based violations (MCL exceedances). A past violation does not necessarily mean water is currently unsafe. For current water quality, contact your local water utility. Source: EPA SDWIS.
What environmental agencies cover Crook? ▼
Environmental compliance in Crook, Wyoming is overseen by the U.S. Environmental Protection Agency (EPA) at the federal level and the Wyoming state environmental agency. Facilities report to the EPA Toxic Release Inventory, water systems are regulated under the Safe Drinking Water Act, and contaminated sites are managed under the Superfund program. Contact your state environmental agency for local concerns.

What does this county environmental profile show?

This county environmental profile rolls up EPA Toxics Release Inventory facility reports, Safe Drinking Water Information System public-water-system filings, and Superfund National Priorities List sites for the county boundary defined by the U.S. Census Bureau. Facility counts reflect facilities with a reporting address inside the county, not where downstream environmental effects may be observed. Population figures are from the most recent Census ACS 5-year estimate. The county detail page is updated whenever the upstream EPA programs publish revised data; see the methodology page for the documented ingest cadence and the editorial choices governing how aggregations are computed.

Related Guides

Understanding EPA Data
How EPA collects and publishes environmental data
Environmental Justice
Who lives near polluters and environmental hazards
How to Check Environmental Quality
Step-by-step guide to checking your local environment

Read our methodology - how this data is sourced, computed, and verified.

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Data sourced from U.S. EPA environmental datasets. See our methodology for details. Retrieved and formatted by PlainEnviro