Pollution in Cascade County, Montana

Cascade County contains 135 EPA-regulated facilities, 5 of which are currently flagged for significant noncompliance. The county also hosts 3 Superfund sites and 3 TRI chemical reporters. EPA has assessed $5.7M in lifetime penalties and TRI reporters disclosed roughly 643.4k lb of on-site releases. That facility count is well above the Montana state average of 40 per county.

Superfund3NPL sites
TRI Facilities3reporters
EPA Facilities135regulated
Sig. Violators5current SNC

Superfund sites

SiteCityStatus
Barker Hughesville Mining DistrictMonarchListed on NPL
Carpenter Snow Creek Mining DistrictNeihartCleanup underway
Acm Smelter And RefineryBlack EagleCleanup underway

Largest releasers

FacilityCityOn-site (lb)Status
Big Sky Scientific LlcSun River558.5kCompliant
Calumet Montana Refining (Cmr), LlcGreat Falls85.0kSig. violation

Significant violators

FacilityCityPenaltiesLast Inspected
Calumet Montana Refining (Cmr), LlcGreat Falls$409.7k2025-08-18
Grass Land ColonyGreat Falls$02024-03-15
Western Livestock AuctionGreat Falls$02021-02-19
Meadow Gold Dairies-Great FallsGreat Falls$02023-03-30
Big Stone ColonySand Coulee$02023-03-20