Clean Water Act discharge permit · NPDES MTR110135

MISSOULA STORAGE CITY, Missoula, MT: NPDES MTR110135 discharge permit, effluent exceedances, inspections, penalties

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

MISSOULA STORAGE CITY, held by Maurer Construction LLC, holds NPDES permit MTR110135, which discharges to Grant Creek. EPA’s file records it issued April 17, 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 MISSOULA STORAGE CITY: its NPDES ID, its permit type and status, its dates, its address in Missoula, Montana, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MTR110135.

Identity

Facility as filed	MISSOULA STORAGE CITY
Permittee as filed	Maurer Construction LLC
NPDES ID	MTR110135
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	April 17, 2023
Expiration date	December 31, 2027
Address	Missoula, MT 59808
Receiving water	GRANT CREEK
Subwatershed	Grant Creek (HUC 170102040103)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

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 MTR110135.

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 MTR110135.

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, MTR110135.

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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 MTR110135 there.

Nearby on the register

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

The MISSOULA STORAGE CITY permit, held by Maurer Construction LLC, is one of 206 storm water construction permits in Missoula County on EPA's NPDES register, and 13.1% of those permits have a violation on file. Among the 194 storm water construction permits in Missoula County, 66.5% were issued earlier than this one, which was issued April 17, 2023. It is also one of 37 NPDES permits in the Grant Creek subwatershed, and it has no pollutants under a numeric limit and no pollutants with an effluent exceedance.