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Clean Water Act discharge permit · NPDES MTG870023

CASCADE COUNTY WEED AND MOSQUITO PESTICIDE, Great Falls, MT: NPDES MTG870023 discharge permit, effluent exceedances, inspections, penalties

CASCADE COUNTY WEED AND MOSQUITO PESTICIDE, held by CASCADE COUNTY WEED AND MOSQUITO MANAGEMENT DIST, holds NPDES permit MTG870023, which discharges to Cascade County. EPA’s file records it issued December 13, 2016 and expiring October 31, 2021. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

What the register holds for CASCADE COUNTY WEED AND MOSQUITO PESTICIDE: 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 MTG870023.

Identity

Facility as filedCASCADE COUNTY WEED AND MOSQUITO PESTICIDE
Permittee as filedCASCADE COUNTY WEED AND MOSQUITO MANAGEMENT DIST
NPDES IDMTG870023
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedDecember 13, 2016
Expiration dateOctober 31, 2021
AddressGreat Falls, MT 59404
Receiving waterCASCADE COUNTY
SubwatershedLast Chance Gulch (HUC 100301011309)
SIC9431 – Admin. Of Public Health Programs

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES MTG870023.

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

EPA’s single-event violation file, as loaded, holds no violation for NPDES MTG870023.

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, MTG870023.

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  • One permit holder — $99/month
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How we handle your data → Privacy

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 MTG870023 there.

Nearby on the register

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

What this page shows

The CASCADE COUNTY WEED AND MOSQUITO PESTICIDE permit is one of 22 general permit coverages in Cascade County on EPA's NPDES register, and 31.8% of those coverages have a violation on file. It also sits among 50 NPDES permits in the Last Chance Gulch subwatershed, and it has 0 pollutants under a numeric limit and 0 pollutants with an effluent exceedance.