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Clean Water Act discharge permit · NPDES MIG250550

US ARMY-ST MARYS FALLS CANAL, Sault Ste. Marie, MI: NPDES MIG250550 discharge permit, effluent exceedances, inspections, penalties

US ARMY-ST MARYS FALLS CANAL, held by US Army Corps of Engineers, holds NPDES permit MIG250550, which discharges to St. Marys River. EPA’s file records it issued September 26, 2023 and expiring April 1, 2028. 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.

Identity

Facility as filedUS ARMY-ST MARYS FALLS CANAL
Permittee as filedUS Army Corps of Engineers
NPDES IDMIG250550
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeFederal facility
IssuedSeptember 26, 2023
Expiration dateApril 1, 2028
Issuing agencyState
AddressSault Ste. Marie, MI 49783
Receiving waterSt. Marys River
SubwatershedFrechette Creek-Frontal Saint Marys River (HUC 040700010101)

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

Effluent limits and exceedances

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 measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Flow, in conduit or thru treatment plant260
Temperature, water deg. fahrenheit130
Outfall observation,visual, y/n response130

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MIG250550.

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

DateWhat EPA recordedAgency
April 21, 2026Reporting Violations - Late Submittal of DMRsST6
March 21, 2026Reporting Violations - Late Submittal of DMRsST6
February 21, 2026Reporting Violations - Late Submittal of DMRsST6
January 21, 2026Reporting Violations - Late Submittal of DMRsST6
November 21, 2025Reporting Violations - Late Submittal of DMRsST6
July 21, 2025Reporting Violations - Late Submittal of DMRsST6
June 21, 2025Reporting Violations - Late Submittal of DMRsST6
April 21, 2025Reporting Violations - Late Submittal of DMRsST6
March 21, 2025Reporting Violations - Late Submittal of DMRsST6
January 21, 2025Reporting Violations - Late Submittal of DMRsST6

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.

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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 MIG250550 there.

Nearby on the register

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

What this page shows

This public-records page covers NPDES permit MIG250550, held by US Army Corps of Engineers for US ARMY-ST MARYS FALLS CANAL in Sault Ste. Marie, MI, which discharges to the St. Marys River within the Frechette Creek-Frontal Saint Marys River subwatershed (HUC 040700010101). The page lists 3 pollutants on file, 3 under a numeric limit, 3 with a violation of any kind, and 0 with an effluent exceedance.