EPA-regulated facilities in Crook County, WY

There are 277 EPA-regulated facilities inside Crook County, Wyoming. The most common kinds are water discharge (158), air emissions (54), hazardous waste (38). 1 is currently in significant noncompliance, the EPA's designation for the most serious or persistent violations, and 15 have a violation on record.

Open the map of Crook County

277facilities in the county

1in significant noncompliance

15with a violation on record

$0in penalties, last 5 years

By category

Category	Facilities
Hazardous waste	38
Small quantity generators	15
Chemical (RMP/TRI)	3
Superfund	3
Air emissions	54
Major sources	3
Synthetic minor sources	2
Minor sources	8
Water discharge	158
Minor permits	126
Drinking water systems	32

A facility enrolled in several programs counts once in the total and once in each of its categories.

In significant noncompliance

The EPA's designation for its most serious or persistent violations, as of the latest data.

ROSS ISR PROJECT MINE UNIT 4 PUMP TESTS 2929 NEW HAVEN ROAD, OSHOTO, WY, 82721 Significant noncompliance

Superfund sites

SUNDANCE AIR FORCE STATION PM-1 SITE SEVEN MILES NORTH OF SUNDANCE, SUNDANCE, WY, 82729
SUNDANCE AIR FORCE STATION OPERATIONS AREA 7 MILES NORTH BY NORTHWEST OF SUNDANCE, SUNDANCE, WY, 82729
BELLE FOURCHE (TRONOX) APPROXIMATELY 4 MILES WEST OF CONOLY, WY, COLONY, WY, 82710

Bordering counties

Reading these numbers

These are regulatory records, not measurements of pollution. Most facilities appear because they hold a permit or file reports, and most of them are compliant; a listing is not a claim that a facility has polluted anything. Compliance status and penalties are the EPA's own determinations in data retrieved Oct 9, 2026. The Data page explains where each record comes from and how it can mislead.