Clean Water Act discharge permit · NPDES MD0003093

MSU ESTUARINE RESEARCH CENTER, St. Leonard, MD: NPDES MD0003093 discharge permit, effluent exceedances, inspections, penalties

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

MSU ESTUARINE RESEARCH CENTER, held by MSU -ESTUARINE RESEARCH CENTER, holds NPDES permit MD0003093, which discharges to Patuxent River. EPA’s file records it issued July 1, 2020 and expiring June 30, 2025. 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

Facility as filed	MSU ESTUARINE RESEARCH CENTER
Permittee as filed	MSU -ESTUARINE RESEARCH CENTER
NPDES ID	MD0003093
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	July 1, 2020
Expiration date	June 30, 2025
Issuing agency	MARYLAND DEPARTMENT OF THE ENVIRONMENT
Address	St. Leonard, MD 20685
Receiving water	PATUXENT RIVER
Subwatershed	Saint Leonard Creek-Patuxent River (HUC 020600060603)
SIC	8733 – Noncommercial Research Organizations

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

2Pollutants on file
1Under a numeric limit
2With 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.

Pollutant or measure	Limits	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
Flow, in conduit or thru treatment plant	2	67	0
pH	0	14	0

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MD0003093.

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

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES MD0003093.

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 MD0003093 there.

Nearby on the register

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

This public-records page covers the Clean Water Act discharge permit NPDES MD0003093, held by MSU ESTUARINE RESEARCH CENTER in St. Leonard, MD, which discharges to the Patuxent River. The permit is listed as administratively continued, with 0 pollutants under a numeric limit and 0 pollutants with an effluent exceedance.