Clean Water Act discharge permit · NPDES MTR109984

GREAT FALLS WATER TREATMENT PLANT SOLIDS DEWATERING BUILDING, Great Falls, MT: NPDES MTR109984 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
0Pollutants under a numeric limit
0Pollutants with an effluent exceedance

GREAT FALLS WATER TREATMENT PLANT SOLIDS DEWATERING BUILDING, held by SLETTEN CONSTRUCTION COMPANY, holds NPDES permit MTR109984, which discharges to Missouri River. EPA’s file records it issued March 7, 2023 and expiring December 31, 2027. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

What the register holds for GREAT FALLS WATER TREATMENT PLANT SOLIDS DEWATERING BUILDING: its NPDES ID, its permit type and status, its dates, its address in Great Falls, Montana, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MTR109984.

Identity

Facility as filed	GREAT FALLS WATER TREATMENT PLANT SOLIDS DEWATERING BUILDING
Permittee as filed	SLETTEN CONSTRUCTION COMPANY
NPDES ID	MTR109984
Permit status	Effective
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Program	Construction stormwater
Issued	March 7, 2023
Expiration date	December 31, 2027
Address	Great Falls, MT 59405
Receiving water	MISSOURI RIVER
Receiving water impaired	303(D) Listed
Subwatershed	Missouri River-Great Falls (HUC 100301021201)
Other EPA IDs (FRS)	RCRA handler MTR000209734

Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.

Effluent limits and exceedances

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

EPA’s limits and effluent violation files hold no pollutant row for NPDES MTR109984.

Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES MTR109984.

Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.

Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.

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, MTR109984.

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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID MTR109984 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

The GREAT FALLS WATER TREATMENT PLANT SOLIDS DEWATERING BUILDING storm water construction permit is one of 132 such permits in Cascade County, and 6.8% of those 132 permits have a violation on file. It sits among 83 NPDES permits in the Missouri River-Great Falls subwatershed, this one included. Of all 128 storm water construction permits in Cascade County, 65.6% carry an earlier issue date than this permit, and this permit records 0 pollutants under a numeric limit and 0 pollutants with an effluent exceedance.