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Clean Water Act discharge permit · NPDES MIS310834

SUPERIOR MATERIALS PLT 21, Brownstown, MI: NPDES MIS310834 discharge permit, effluent exceedances, inspections, penalties

SUPERIOR MATERIALS PLT 21, held by Superior Materials, LLC, holds NPDES permit MIS310834. EPA’s file records it issued April 8, 2026 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.

What the register holds for SUPERIOR MATERIALS PLT 21: its NPDES ID, its permit type and status, its dates, its address in Brownstown, Michigan. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MIS310834.

Identity

Facility as filedSUPERIOR MATERIALS PLT 21
Permittee as filedSuperior Materials, LLC
NPDES IDMIS310834
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedApril 8, 2026
Expiration dateApril 1, 2028
Issuing agencyState
AddressBrownstown, MI 48193
Receiving water impaired303(D) Listed
SubwatershedBrownstone Creek (HUC 040900040502)

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

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES MIS310834.

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 MIS310834.

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

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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 MIS310834 there.

Nearby on the register

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

What this page shows

The SUPERIOR MATERIALS PLT 21 general permit coverage in Brownstown, Michigan, is one of 7 such coverages in the city on EPA's NPDES register, and 85.7% of those 7 were issued earlier than this one. The permit records zero pollutants under a numeric limit and zero pollutants with an effluent exceedance, which sets it apart from the 28.6% of Brownstown's general permit coverages that carry a violation on file.