Clean Water Act discharge permit · NPDES MIS210311

SUPERIOR MATERIALS PLT 32, Detroit, MI: NPDES MIS210311 discharge permit, effluent exceedances, inspections, penalties

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

SUPERIOR MATERIALS PLT 32, held by Superior Materials LLC, holds NPDES permit MIS210311, which discharges to River Rouge. EPA’s file records it issued January 26, 2022 and expiring March 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.

Identity

Facility as filed	SUPERIOR MATERIALS PLT 32
Permittee as filed	Superior Materials LLC
NPDES ID	MIS210311
Permit status	Effective
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	January 26, 2022
Expiration date	March 31, 2027
Issuing agency	State
Address	Detroit, MI 48209
Receiving water	River Rouge
Receiving water impaired	303(D) Listed
Subwatershed	Woodmere Cemetery-River Rouge (HUC 040900040407)

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 MIS210311.

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

2Single-event violations

Date	What EPA recorded	Agency
September 19, 2023	Management Practice Violations - Improper Operation and Maintenance	ST6
September 19, 2023	WW Storm Water Non-Construction - Failure to develop any or adequate SWPPP/SWMP	ST6

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 MIS210311 there.

Nearby on the register

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

This public-records page covers NPDES permit MIS210311, held by Superior Materials LLC for the facility SUPERIOR MATERIALS PLT 32 in Detroit, MI, which discharges to the River Rouge in the Woodmere Cemetery-River Rouge subwatershed (HUC 040900040407). The permit is listed as effective, with an issue date of January 26, 2022 and an expiration date of March 31, 2027, and the file shows 0 pollutants on file, 0 under a numeric limit, 0 with a violation of any kind, and 0 with an effluent exceedance.