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MPDES Individual Permits

Major MPDES Permits

Major municipal dischargers include all facilities with design flows of greater than one million gallons per day and facilities with EPA/State approved industrial pretreatment programs. Major industrial facilities are determined based on specific ratings criteria developed by EPA/State. Below is a listing of all active permits in Montana, issued by the department, that are classified as major dischargers.

Permit Number Facility Name Permittee Name Location
MT0000035 M2Green Redevelopment WWT System M2Green Redevelopment LLC Missoula MT
MT0000191 Montana Resources Montana Resources Butte MT
MT0000205 Bonner Mill Site Bonner Property Development Bonner MT
MT0000248 Sugar Beet Processing Facility Sidney Sugars Inc Richland County MT
MT0000256 Phillips 66 Billings Refinery Phillips 66 Company Billings MT
MT0000264 Cenex Harvest States Cooperatives Cenex Harvest States Cooperatives Laurel MT
MT0000281 Sugar Beet Processing Facility Western Sugar Cooperative Yellowstone County MT
MT0000302 Lewis & Clark Station Steam Electric Power Plant Montana Dakota Utilities Co Sidney MT
MT0000396 Corette Steam Electric Power Plant PPL Montana LLC Billings, MT
MT0000477 ExxonMobil Billings Refinery ExxonMobil Corporation Billings, MT
MT0000892 Decker West Mine Decker Coal Company Bighorn County MT
MT0020001 City of Miles City Domestic Wastewater Treatment Plant City of Miles City Miles City MT
MT0020028 City of Hamilton Domestic Wastewater Treatment Plant City of Hamilton Hamilton MT
MT0020044 City of Lewistown Domestic Wastewater Treatment Facilities City of Lewistown Lewistown MT
MT0020184 City of Whitefish Domestic Wastewater Treatment Plant City of Whitefish Whitefish MT
MT0020311 City of Laurel Wastewater Plant City of Laurel Laurel MT
MT0020397 Bigfork County Water and Sewer District Domestic Wastewater Treatment Plant Bigfork County Water and Sewer District Bigfork Flathead Counties MT
MT0020435 City of Livingston Domestic Wastewater Treatment Plant City of Livingston Livingston MT
MT0020478 City of Red Lodge Domestic Wastewater Plant City of Red Lodge Red Lodge MT
MT0020494 City of Libby Domestic Wastewater Treatment Plant City of Libby Libby MT
MT0021628 City of Glendive Domestic Wastewater Treatment Lagoon City of Glendive Glendive MT
MT0021849 City of Sidney Wastewater Treatment Facility City of Sidney Sidney MT
MT0021920 City of Great Falls Domestic Wastewater Treatment Plant City of Great Falls Great Falls MT
MT0021938 City of Kalispell Domestic Wastewater Treatment Plant City of Kalispell Kalispell MT
MT0022012 City and County of Butte-Silver Bow Domestic Wastewater Treatment Facilities City and County of Butte-Silver Bow Butte MT
MT0022535 City of Havre Domestic Wastewater Treatment Plant City of Havre Havre MT
MT0022586 City of Billings Sewage Treatment Plant City of Billings Billings MT
MT0022594 City of Missoula Domestic Wastewater Treatment Facilities City of Missoula Missoula, MT
MT0022608 City of Bozeman Domestic Wastewater Treatment Facilities City of Bozeman Bozeman MT
MT0022616 City of Deer Lodge Domestic Wastewater Treatment Facility City of Deer Lodge Deer Lodge MT
MT0022641 City of Helena Domestic Wastewater Treatment Plant City of Helena Helena MT
MT0023965 Rosebud Mine Western Energy Company Colstrip MT
MT0024210 Decker East Mine Decker Coal Company Blaine County MT
MT0025020 Paragon Mining Suction Dredge Paragon Mining Inc Lewis and Clark County MT
MT0030066 Columbia Falls Aluminum Columbia Falls Aluminum Co LLC Flathead County
MT0031755 Butte Highlands Mine Butte Highlands JV LLC Silver Bow County

 

Minor MPDES Permits

Minor municipal dischargers include all facilities that do not meet the classification criteria of a Major discharger. Below is a listing of all active permits in Montana, issued by the department, that are classified as minor dischargers.

Permit Number Facility Name Permittee Name Location
MT0000019 Whitefish Depot BN Santa Fe Railway Whitefish MT
MT0000094 Seaboard Foods Seaboard Foods LLC Missoula MT
MT0000221 Kootenai Business Park Kootenai Business Park Industrial Dstrict  Libby MT
MT0000230 Montana Sulphur and Chemical Co Montana Sulphur and Chemical Co Billings MT
MT0000388 Montana Rail Link  Helena Montana Rail Link Helena MT
MT0000400

City of Harlowton

City of Harlowton Harlowton MT
MT0000442 Great Falls WTP City of Great Falls Great Falls MT
MT0000451 Ash Grove Cement Company Ash Grove Cement Company Clancy MT
MT0000485 Holcim US Inc Holcim US Inc Three Forks MT
MT0000876 Glendive WTP City of Glendive Glendive MT
MT0000884 Big Sky Coal Company  Big Sky Coal Company Colstrip MT
MT0000931 City of Harlem WTP City of Harlem Harlem MT
MT0020036 City of Columbia Falls WWTP City of Columbia Falls Columbia Falls MT
MT0020052 City of Choteau WWTP City of Choteau Teton County MT
MT0020079 City of Conrad WWTP City of Conrad  Conrad MT 
MT0020125 City of Chinook WWTP City of Chinook  Blaine County MT 
MT0020133 Town of Whitehall WWTP Town of Whitehall Whitehall MT
MT0020141 City of Cut Bank WWTP City of Cut Bank Cut Bank MT 
MT0020168 Lolo Water & Sewer District Missoula County Commissioners Lolo MT
MT0020249 Town of Joliet WWTP  Town of Joliet Carbon County MT 
MT0020303 Town of Bridger WWTP  Town of Bridger  Bridger MT
MT0020338 Town of Chester WWTP Town of Chester  Chester MT
MT0020354 City of Harlowton WWTP  City of Harlowton  Harlowton MT 
MT0020371 Town of Ekalaka WWTP  Town of Ekalaka  Ekalaka MT 
MT0020389 City of Malta WWTP  City of Malta  Malta MT 
MT0020401 Town of Three Forks WWTP Town of Three Forks  Gallatin County MT
MT0020451 Town of Ryegate WWTP  Town of Ryegate  Golden Valley County MT  
MT0020460 Yellowstone Boys & Girls Ranch  Yellowstone Boys & Girls Ranch  Billings MT 
MT0020516 Town of Wibaux WWTP  Town of Wibaux  Wibaux MT 
MT0020656 Hinsdale Water and Sewer District WWTP Hinsdale Water and Sewer District  Hinsdale MT
MT0020664 City of Superior WWTP City of Superior  Superior MT 
MT0020699 City of White Sulphur Springs WWTP City of White Sulphur Springs White Sulphur Springs MT 
MT0020702 Town of Winnett WWTP Town of Winnett Winnett MT
MT0020753 City of Big Timber WWTP City of Big Timber Big Timber MT
MT0020796 Town of Circle WWTP  Town of Circle  Circle MT
MT0021211 City of Glasgow WWTP  City of Glasgow  Glasgow MT 
MT0021229 Westmoreland Resources - Absaloka Mine  Westmoreland Resources Inc Big Horn County MT
MT0021270 City of Harlem WWTP City of Harlem Harlem MT 
MT0021288 City of Forsyth WWTP  City of Forsyth  Forsyth MT 
MT0021385 Town of Jordan WWTP  Town of Jordan  Jordan MT
MT0021431 Galen WWTP  Montana Behavioral Health Galen MT
MT0021440 Vaughn Cascade Cnty Sewer District  WWTP Vaughn Cascade Cnty Sewer District  Cascade County MT
MT0021458 City of Dillon WWTP  City of Dillon Dillon MT 
MT0021555 Town of Alberton  WWTP  Town of Alberton  Alberton MT 
MT0021571 Town of Belt WWTP  Town of Belt  Belt MT
MT0021601 City of Fort Benton WWTP  City of Fort Benton  Fort Benton MT
MT0021636 Town of Hobson WWTP Town of Hobson  Hobson MT 
MT0021679 Town of Sunburst WWTP  Town of Sunburst Sunburst MT 
MT0021709 Town of Hysham WWTP  Town of Hysham  Hysham MT
MT0021733 Community of West Glendive WWTP Dawson County West Glendive  West Glendive MT 
MT0021750 Absarokee Sewer District RSID 5 & 7 WWTP  Absarokee Sewer District RSID 5 & 7  Absarokee MT
MT0021792 Town of Valier WWTP  Town of Valier  Valier MT 
MT0021857 City of Manhattan WWTP  City of Manhattan  Manhattan MT 
MT0022080 Highwood County Water & Sewer District  WWTP Highwood County Water & Sewer District  Highwood MT
MT0022161 Town of Stanford WWTP Town of Stanford Stanford MT 
MT0022373 City of Colstrip WWTP City of Colstrip Colstrip MT 
MT0022390 USCOE Libby Dam   USCOE Libby Dam  Libby MT 
MT0022454 Town of Big Sandy WWTP  Town of Big Sandy  Big Sandy MT 
MT0022462 Town of Denton WWTP Town of Denton  Denton MT
MT0022560 City of East Helena WWTP  City of East Helena  East Helena MT 
MT0022578 US Bureau of Reclamation - Hungry Horse Dam US Bureau of Reclamation Hungry Horse MT 
MT0022705 Gardiner Park County Water & Sewer Dist WWTP Gardiner Park County Water & Sewer Dist Gardiner MT 
MT0022713 Town of Stevensville WWTP  Town of Stevensville Stevensville MT 
MT0023078 Town of Boulder WWTP  Town of Boulder Boulder MT 
MT0023566 Elkhorn Health and Rehabilitation WWTP Elkhorn Health and Rehabilitation LLC Alhambra MT
MT0023604 Westmoreland Savage Corp  Savage Mine  Westmoreland Savage Corp  W of Savage MT 
MT0023639 Boulder Hot Springs  WWTF  Boulder Hot Springs  Jefferson County MT 
MT0024619 Spring Creek Coal - Spring Creek Mine Spring Creek Coal LLC  Decker MT 
MT0024716 Stillwater Mining Co  Stillwater Mine Stillwater Mining Company  Stillwater County MT 
MT0024783 Richland County Savage Lagoon  Richland County Commissioners Richland County 
MT0025038 Willow Creek WWTP Willow Creek Sewer District #306 Willow Creek MT 
MT0026808 Stillwater Mining Co  East Boulder   Stillwater Mining Company  Big Timber MT 
MT0027430 County Sewer & Water Dist of Rocker   County Sewer & Water Dist of Rocker  Rocker MT 
MT0027821 Beaverhead Mine  Rio Tinto Minerals Madison County MT
MT0028118 City of Livingston Municipal Swimming Pool City of Livingston Livingston MT
MT0028321 Suction Dredge ExxonMobil Corp Billings MT 
MT0028584 Yellowstone Mine  Imerys Talc America Inc  Madison MT 
MT0028665 Sun Prairie Village WWTP   Sun Prairie Village Water & Sewer District  Sun Prairie MT 
MT0028720 City of Helena -Ten Mile WWTP City of Helena  Helena MT
MT0028797 Town of Twin Bridges WWTP Town of Twin Bridges  Twin Bridges MT 
MT0028843 Ennis Hot Springs WWTP Ennis Hot Springs LLP  Ennis MT
MT0028983 Bull Mountain Mine #1 WWT Signal Peak Energy LLC  Roundup MT
MT0029840 Econo Lodge  Motel Partners I  Missoula MT 
MT0029891 Treasure Mine  Barretts Minerals Inc  Dillon MT 
MT0029980 Potable Water Treatment Plant  Montana Aviation Research Co  Valley County MT 
MT0030015 M & W Milling and Refining   M & W Milling and Refining  Madison County MT
MT0030091 Stockett Water & Sewer Dist WWTP  Stockett Water & Sewer Dist  Stockett MT 
MT0030147 ASARCO East Helena Site Montana Environmental Trust Group LLC East Helena MT 
MT0030155 Potable WTP  City of Bozeman  Bozeman MT 
MT0030180 Yellowstone Energy Limited Partnership  Yellowstone Energy Limited Partnership  Billings MT
MT0030244 Town of Kevin WWTP Town of Kevin  Kevin MT
MT0030252 Treated WW  TVX Mineral Hill Inc  Gardiner MT 
MT0030261 City of Laurel  City of Laurel  Laurel MT
MT0030279 Montanore Mine Montanore Minerals Corp  Libby MT 
MT0030287 Rock Creek Mine  Revett Silver Company Sanders County MT 
MT0030295 City of Roundup WWTP  City of Roundup Roundup MT
MT0030309 Town of Grass Range WWTP  Town of Grass Range  Grass Range MT 
MT0030341 City of Libby WWTP  City of Libby  Libby MT 
MT0030350 REC Advanced Silicon Materials WWTP  REC Advanced Silicon Materials LLC Silver Bow County MT 
MT0030392 Wright Creek Water Disposal Facility  M and K Oil Company Inc  Powder River County MT 
MT0030414 City of Whitefish WTP City of Whitefish  Whitefish MT  
MT0030422 City of Colstrip WTP  City of Colstrip Colstrip MT 
MT0030465 Town of Plains WWTP Town of Plains  Plains MT 
MT0030473 City of Chinook Potable Water  City of Chinook  Blaine County MT 
MT0030601 Lake McDonald WWTP  Glacier National Park  West Glacier MT
MT0030651 Non Contact Cooling Water Don Abbey Rollins MT 
MT0030660 Coal Creek Federal Development Unit Treatment Facility  Summit Gas Resources Inc  Decker MT 
MT0030724 Tongue River WTP Fidelity Exploration and Production Co Decker MT 
MT0030732 Town of Ennis WWTP  Town of Ennis  Ennis MT 
MT0031411 Stoker Coal Processing Facility Wolf Mountain Coal Inc Decker MT
MT0031437  Sweetgrass Community WWTP  Sweetgrass Comm Community Water Sewer Dist  Toole County MT 
MT0031453 Town of Winifred WWTP  Town of Winifred  Winifred MT 
MT0031488 City of Shelby WWTP City of Shelby  Shelby MT 
MT0031500 Town of Philipsburg  WWTP Town of Philipsburg  Philipsburg MT 
MT0031551 Fort Peck Dam   US Army Corps of Engineers Fort Peck
MT0031593 Hanging Woman Creek Treatment Facility  James Guercio  Decker MT
MT0031623 Ionfina Natural Gas WWTP Ionfina Natural Gas Inc Gilford MT 
MT0031631 City of Bozeman WWTP  City of Bozeman Bozeman MT 
MT0031658 Non Contact Cooling Water  John Collins Whitefish MT
MT0031666 Baldwin Lynch Energy Treatment Facility  Baldwin Lynch Energy Corporation Belfry MT 
MT0031691 Belle Creek Central Facility Denbury Onshore LLC Powder River County
MT0031712 Wolf Creek County Water Sewer Dist  WWTP  Wolf Creek County Water Sewer Dist  Wolf Creek MT 
MT0031721 Drumlummon Gold Mine Drumlummon Gold Corporation Inc Marysville MT
MT0031747 Krause Lease H & R Energy LLC Toole County MT
MT0031798 Culbertson WWTF Town of Culbertson Culbertson MT