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Clean Water Act discharge permit · NPDES MI0000558

TRENTON MI LLC-EAST SIDE, Trenton, MI: NPDES MI0000558 discharge permit, effluent exceedances, inspections, penalties

TRENTON MI LLC-EAST SIDE, held by Solutia Incorporated, holds NPDES permit MI0000558, which discharges to Detroit River. EPA’s file records it issued January 10, 2014 and expiring October 1, 2017. 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 filedTRENTON MI LLC-EAST SIDE
Permittee as filedSolutia Incorporated
NPDES IDMI0000558
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedJanuary 10, 2014
Expiration dateOctober 1, 2017
Issuing agencyState
AddressTrenton, MI 48183
Receiving waterDetroit River
SubwatershedHuntington Creek-Frontal Lake Erie (HUC 040900040503)
Other EPA IDs (FRS)RCRA handler MID009708678

Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.

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
Phosphorus, total [as P]2383May 31, 201895% over the limit
Oxygen, dissolved [DO]111September 30, 201967% over the limit
Outfall observation,visual, y/n response1270
Flow, in conduit or thru treatment plant0180
Temperature, water deg. fahrenheit080
Thermal Discharge080
Nitrogen, ammonia total [as N]080
Copper, total [as Cu]050

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
August 9, 2022Management Practice Violations - Improper Operation and MaintenanceST6
March 26, 2019Monitoring Violations - Invalid/Unrepresentative SampleST6

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 MI0000558 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 MI0000558, held by Solutia Incorporated for TRENTON MI LLC-EAST SIDE in Trenton, MI, which discharges to the Detroit River and is listed as a Minor discharger, class 3, administratively continued. The page lists 2 pollutants under a numeric limit and 2 pollutants with an effluent exceedance, with the permit shown as issued January 10, 2014 and expiring October 1, 2017.