Clean Water Act discharge permit · NPDES MOR040005

MSD PHASE II MS4, St Louis, MO: NPDES MOR040005 discharge permit, effluent exceedances, inspections, penalties

• Administratively continuedPermit status
• MinorDischarger class
• 1Pollutants under a numeric limit
• 0Pollutants with an effluent exceedance

MSD PHASE II MS4, held by MSD PLUS 60 CONT AUTHORI, holds NPDES permit MOR040005, which discharges to Maline Cr.. EPA’s file records it issued December 14, 2016 and expiring September 30, 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.

Identity

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

• 1Pollutants on file
• 1Under a numeric limit
• 0With a violation of any kind
• 0With an effluent exceedance

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.

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MOR040005.

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

• 29Single-event violations

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.

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 MOR040005 there.

Nearby on the register

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