Clean Water Act discharge permit · NPDES MTR000121

AAA COOPER TRANSPORTATION, Billings, MT: NPDES MTR000121 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
0Pollutants under a numeric limit
0Pollutants with an effluent exceedance
1Inspections on file
0Formal enforcement actions

AAA COOPER TRANSPORTATION, held by MIDWEST MOTOR EXPRESS INC, holds NPDES permit MTR000121, which discharges to Yellowstone River. EPA’s file records it issued July 1, 2018 and expiring January 31, 2023.

AAA COOPER TRANSPORTATION, Billings, Montana: Coverage under a general permit MTR000121, held by MIDWEST MOTOR EXPRESS INC; Industrial stormwater; Administratively continued (past its expiration date and still in force until reissued); issued July 1, 2018, term to January 31, 2023; discharges to YELLOWSTONE RIVER.

pH: 0 limits, 2 violations of any kind, 0 effluent exceedances.
Solids, total suspended: 0 limits, 2 violations of any kind, 0 effluent exceedances.
BOD, 5-day, 20 deg. C: 0 limits, 1 violation of any kind, 0 effluent exceedances.
Oxygen demand, chem. [low level] [COD]: 0 limits, 1 violation of any kind, 0 effluent exceedances.
Nitrogen, Kjeldahl, total [as N]: 0 limits, 1 violation of any kind, 0 effluent exceedances.
Phosphorus, total [as P]: 0 limits, 1 violation of any kind, 0 effluent exceedances.
Chemical Oxygen Demand [COD]: 0 limits, 1 violation of any kind, 0 effluent exceedances.
Oil and grease visual: 0 limits, 1 violation of any kind, 0 effluent exceedances.

July 22, 2026: Letter of Violation/ Warning Letter (State).
June 22, 2026: WW Storm Water Non-Construction - Failure to develop any or adequate SWPPP/SWMP (ST6).
June 22, 2026: WW Storm Water Non-Construction - Failure to submit required report (non-DMR) (ST6).
June 22, 2026: WW Storm Water Non-Construction - Failure to properly operate and maintain BMPs (ST6).
June 22, 2026: Evaluation (S).
July 17, 2020: WW Storm Water Non-Construction - Failure to develop any or adequate SWPPP/SWMP (ST6).
July 17, 2020: WW Storm Water Non-Construction - Failure to submit required report (non-DMR) (ST6).
July 17, 2020: WW Storm Water Non-Construction - Failure to Maintain Records (ST6).
July 17, 2020: WW Storm Water Non-Construction - Failure to Conduct Inspections (ST6).
July 17, 2020: WW Storm Water Non-Construction - Failure to properly install/implement BMPs (ST6).

Montana holds 465 Industrial stormwater coverages of this permit type in EPA’s file; 212 were issued before MTR000121.

Coverages issued nearest MTR000121

June 18, 2018: WYO BEN INC - MONTANA 2-LOYNING, Bridger, MTR000582, held by WYO BEN INC
June 18, 2018: MARKS MILLER POST AND POLE, Clancy, MTR000597, held by GARY MARKS
June 21, 2018: GOLDEN SUNLIGHT MINE, Whitehall, MTR000498, held by BARRICK GOLD CORPORATION
June 22, 2018: CITY OF LIVINGSTON WWTP, Livingston, MTR000494, held by CITY OF LIVINGSTON
July 1, 2018: GRAYMONT WESTERN US INC, Townsend, MTR000090
July 1, 2018: RINKER MATERIALS, Billings, MTR000497, held by FORTERRA CONCRETE PRODUCTS INC
July 3, 2018: TRACT 3, Worden, MTR000627, held by AGGREGATE RESOURCES INC
July 6, 2018: F H STOLTZE LAND AND LUMBER CO, Columbia Falls, MTR000019
July 17, 2018: 4 RIVERS CONCRETE, Sheridan, MTR000542, held by PJSG INC DBA 4 RIVERS CONCRETE PRODUCTS
July 19, 2018: BNSF - HELENA RAIL YARD, Helena, MTR000361, held by BNSF RAILROAD

AAA COOPER TRANSPORTATION among its neighbors

EPA’s permit file holds 157 discharge permits in the Yellowstone River-Billings subwatershed (HUC 100700041006), MTR000121 among them. Its county holds 431, 6 of them major permits; MTR000121 is a minor permit.

Other permits in the Yellowstone River-Billings subwatershed (HUC 100700041006)

1ST AVE S - ADA (BILLINGS), Billings: MTR106802, minor permit, discharging to Upper Yellowstone-Lake Basin, permit term to December 31, 2017
27TH STREET - 1ST AVE S TO AIRPORT, Billings: MTR107935, minor permit, discharging to YEGEN DRAIN, permit term to December 31, 2022
322 SOUTH PLAINVIEW WAREHOUSE TENANT IMPROVEMENTS, Billings: MTR106676, minor permit, discharging to Upper Yellowstone-Lake Basin, permit term to December 31, 2017
44 WEST, Billings: MTR111701, minor permit, discharging to SNOW DITCH, permit term to December 31, 2027
48TH & CENTRAL, Billings: MTR111712, minor permit, discharging to YELLOWSTONE RIVER, permit term to December 31, 2027
54TH ST. SUBDIVISION, Billings: MTR111598, minor permit, discharging to UNKNOWN, permit term to December 31, 2027
ALBERTSONS 54TH & GRAND, Billings: MTR109321, minor permit, discharging to SNOW DITCH, permit term to December 31, 2022
ALLIED WASTE SERVICES OF NORTH AMERICA, Billings: MTR000320, minor permit, discharging to YELLOWSTONE RIVER, permit term to January 31, 2018
ALLIED WASTE SERVICES OF NORTH AMERICA BILLINGS RECYCLING, Billings: MTR000366, minor permit, discharging to YELLOWSTONE RIVER, permit term to January 31, 2018
AMERICAN WELDING & GAS, INC., Billings: MTR000669, minor permit, discharging to YELLOWSTONE RIVER, permit term to January 31, 2023

Identity

Facility as filed	AAA COOPER TRANSPORTATION
Permittee as filed	MIDWEST MOTOR EXPRESS INC
NPDES ID	MTR000121
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Program	Industrial stormwater
Issued	July 1, 2018
Expiration date	January 31, 2023
Address	Billings, MT 59101
Receiving water	YELLOWSTONE RIVER
Subwatershed	Yellowstone River-Billings (HUC 100700041006)
SIC	4213 – Trucking, Except Local

Effluent limits and exceedances

8Pollutants on file
0Under a numeric limit
8With a violation of any kind
0With an effluent exceedance

An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.

Pollutant or measure	Limits	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
pH	0	2	0
Solids, total suspended	0	2	0
BOD, 5-day, 20 deg. C	0	1	0
Oxygen demand, chem. [low level] [COD]	0	1	0
Nitrogen, Kjeldahl, total [as N]	0	1	0
Phosphorus, total [as P]	0	1	0
Chemical Oxygen Demand [COD]	0	1	0
Oil and grease visual	0	1	0

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MTR000121.

Inspections, violations and enforcement

8Single-event violations

Date	What EPA recorded	Agency
June 22, 2026	WW Storm Water Non-Construction - Failure to develop any or adequate SWPPP/SWMP	ST6
June 22, 2026	WW Storm Water Non-Construction - Failure to submit required report (non-DMR)	ST6
June 22, 2026	WW Storm Water Non-Construction - Failure to properly operate and maintain BMPs	ST6
July 17, 2020	WW Storm Water Non-Construction - Failure to develop any or adequate SWPPP/SWMP	ST6
July 17, 2020	WW Storm Water Non-Construction - Failure to submit required report (non-DMR)	ST6
July 17, 2020	WW Storm Water Non-Construction - Failure to Maintain Records	ST6
July 17, 2020	WW Storm Water Non-Construction - Failure to Conduct Inspections	ST6
July 17, 2020	WW Storm Water Non-Construction - Failure to properly install/implement BMPs	ST6

Inspections

Date	What EPA recorded	Agency
June 22, 2026	Evaluation	S

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

Date	What EPA recorded	Agency
July 22, 2026	Letter of Violation/ Warning Letter	State

Watch this permit

One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, MTR000121.

Start the watch

How we handle your data → Privacy

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

This public-records page covers Clean Water Act discharge permit NPDES MTR000121 for AAA COOPER TRANSPORTATION in Billings, MT, held by MIDWEST MOTOR EXPRESS INC and discharging to the Yellowstone River under an industrial stormwater program, with the permit administratively continued and classed as a minor discharger. The page lists 0 pollutants under a numeric limit and 0 pollutants with an effluent exceedance, and it notes the permit was issued July 1, 2018 and expired January 31, 2023.