EPA · discharge permits by state

Discharge permits in Montana

4,574Current permits
35Major dischargers
574Individual permits

A major discharger is one EPA rates as significant on volume, toxicity or the water it reaches; the rest are minors. An individual permit is written for one operation, while general permit coverage applies a statewide permit to a site that qualifies for it.

By what is permitted in Montana

By city

Other states

Every state carrying three or more current permits, in alphabetical order.

Permits

Major dischargers first. Not every permit in Montana is listed here.

Permit holder	NPDES ID	City	Program	Discharger	Receiving water
BIGFORK WWTP	MT0020397	BIGFORK	Publicly owned treatment works	Major	FLATHEAD LAKE
BLACK BUTTE COPPER PROJECT	MT0031909	WHITE SULPHUR SPRINGS (HISTORICAL)		Major	SHEEP CREEK
BONNER PROPERTY DEVELOPMENT	MT0000205	BONNER		Major	BLACKFOOT RIVER
BUTTE HIGHLANDS MINE	MT0031755	BUTTE		Major	Upper Clark Fork
BUTTE-SILVER BOW WWTP	MT0022012	BUTTE	Publicly owned treatment works	Major	SILVER BOW CREEK
CHS INC	MT0000264	LAUREL		Major	YELLOWSTONE RIVER
CITY OF BILLINGS WWTP	MT0022586	BILLINGS	Publicly owned treatment works	Major	YELLOWSTONE RIVER
CITY OF BOZEMAN WWTP	MT0022608	BOZEMAN	Publicly owned treatment works	Major	EAST GALLATIN RIVER
CITY OF GLENDIVE WATER RESOURCE & RECOVERY FACILITY	MT0021628	GLENDIVE	Publicly owned treatment works	Major	GLENDIVE CREEK
CITY OF GREAT FALLS WWTP	MT0021920	GREAT FALLS	Publicly owned treatment works	Major	MISSOURI RIVER
CITY OF HAMILTON WASTEWATER TREATMENT PLANT	MT0020028	HAMILTON	Publicly owned treatment works	Major	BITTERROOT RIVER
CITY OF HAVRE WWTP	MT0022535	HAVRE	Publicly owned treatment works	Major	MILK RIVER
CITY OF HELENA WWTP	MT0022641	HELENA	Publicly owned treatment works	Major	PRICKLY PEAR CREEK
CITY OF KALISPELL WWTP	MT0021938	KALISPELL	Publicly owned treatment works	Major	ASHLEY CREEK
CITY OF LAUREL WWTP	MT0020311	LAUREL	Publicly owned treatment works	Major	YELLOWSTONE RIVER
CITY OF MISSOULA WWTP	MT0022594	MISSOULA	Publicly owned treatment works	Major	CLARK FORK RIVER
CITY OF WHITEFISH WWTF	MT0020184	WHITEFISH	Publicly owned treatment works	Major	WHITEFISH RIVER
DECKER COAL CO (EAST MINE)	MT0024210	DECKER		Major	TONGUE RIVER RESERVOIR
DECKER COAL CO (WEST MINE)	MT0000892	DECKER		Major	TONGUE RIVER RESERVOIR
DEER LODGE WWTP	MT0022616	DEER LODGE	Publicly owned treatment works	Major	UPPER CLARK FORK RIVER
FRENCHTOWN MILL SITE WWTS	MT0000035	MISSOULA		Major	CLARK FORK RIVER
HARDIN WASTEWATER TREATMENT PLANT	MT0030759	HARDIN	Publicly owned treatment works	Major	BIG HORN RIVER
LEWISTOWN WWTP	MT0020044	LEWISTOWN	Publicly owned treatment works	Major	BIG SPRING CREEK
LIBBY WWTP	MT0020494	LIBBY	Publicly owned treatment works	Major	KOOTENAI RIVER
MDU - LEWIS & CLARK PLANT	MT0000302	SIDNEY		Major	YELLOWSTONE RIVER
MILES CITY WWTP	MT0020001	MILES CITY	Publicly owned treatment works	Major	YELLOWSTONE RIVER
MONTANA RESOURCES	MT0000191	BUTTE		Major	SILVER BOW CREEK
PALEO SEARCH INC - SUCTION DREDGE PROJECT	MT0025020	HELENA		Major	MISSOURI RIVER
PAR MONTANA LLC	MT0000477	BILLINGS		Major	YELLOWSTONE RIVER
PHILLIPS 66 - BILLINGS REFINERY	MT0000256	BILLINGS		Major	YELLOWSTONE RIVER
RED LODGE WWTF	MT0020478	RED LODGE	Publicly owned treatment works	Major	ROCK CREEK
SIDNEY SUGARS INCORPORATED	MT0000248	SIDNEY		Major	YELLOWSTONE RIVER
WATER RECLAMATION FACILITY	MT0020435	LIVINGSTON	Publicly owned treatment works	Major	YELLOWSTONE RIVER
WESTERN ENERGY CO - ROSEBUD MINE	MT0023965	COLSTRIP		Major	SEVERAL STREAMS AND CREEKS
WESTERN SUGAR COOPERATIVE	MT0000281	BILLINGS		Major	YELLOWSTONE RIVER
0.25 MILES WEST OF DENTON	MTR109348	DENTON	Construction stormwater	Minor	WOLF CREEK
1 MILE NORTH OF FOUR BUTTES	MTR106882	SCOBEY	Construction stormwater	Minor	POPLAR
10067000 LODGE GRASS - NORTH IM 90-9(143)524	MTR10I05I	LODGE GRASS	Construction stormwater	Minor	Little Bighorn River-Nest Creek
101 RECONNECT	MTR109481	FAIRVIEW	Construction stormwater	Minor	YELLOWSTONE RIVER
10330 DRY CREEK	MTR111486	BELGRADE	Construction stormwater	Minor	DRY CREEK