Clean Water Act discharge permit · NPDES MDG999378

TIDEWATER MARINA, Havre De Grace, MD: NPDES MDG999378 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
0Pollutants under a numeric limit
0Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

TIDEWATER MARINA, held by Tidewater / Havre de Grace, Inc., holds NPDES permit MDG999378. EPA’s file records it issued January 23, 2018 and expiring July 31, 2026.

TIDEWATER MARINA, Havre De Grace, Maryland: Coverage under a general permit MDG999378, held by Tidewater / Havre de Grace, Inc.; Administratively continued (past its expiration date and still in force until reissued); issued January 23, 2018, term to July 31, 2026, by MARYLAND DEPARTMENT OF THE ENVIRONMENT.

TIDEWATER MARINA among its neighbors

EPA’s permit file holds 13 discharge permits in the Rock Run-Susquehanna River subwatershed (HUC 020503061713), MDG999378 among them. Its county holds 90, 1 of them major permits; MDG999378 is a minor permit.

Other permits in the Rock Run-Susquehanna River subwatershed (HUC 020503061713)

ALWAYS RECYCLING, LLC, Havre De Grace: MDR003534, minor permit, discharging to LOWER SUSQUEHANNA RIVER, permit term to January 31, 2028
CAPTAIN LEE MARINA, Perryville: MDG999402, minor permit, discharging to LOWER SUSQUEHANNA RIVER, permit term to September 30, 2024
COKESBURY ROAD MINE, Perryville: MDG499767, minor permit, discharging to LOWER SUSQUEHANNA RIVER, permit term to April 30, 2015
CONSTELLATION ENERGY GENERATION LLC HARFORD CONOWINGO HYDROELECTRIC PLANT, Darlington: MDG870198, minor permit, permit term to March 31, 2025
DONALDSON BROWN CENTER WWTP, Port Deposit: MD0054950, minor permit, discharging to LOWER SUSQUEHANNA RIVER, permit term to July 31, 2019
EVONIK CORPORATION, Havre De Grace: MDR003742, minor permit, discharging to LOWER SUSQUEHANNA RIVER, permit term to January 31, 2028
GREAT WOLF LODGE - PERRYVILLE, Perryville: MDG767328, minor permit, discharging to SUSQUEHANNA RIVER, permit term to November 30, 2027
HARVE DE GRACE QUARRY, Harve De Grace,: MDG492956, minor permit, discharging to SUSQUEHANNA RIVER, permit term to April 30, 2015
PERRYVILLE DEPARTMENT OF PUBLIC WORKS MAINTENANCE SHOP, Perryville: MDR003535, minor permit, discharging to Lower Susquehanna River, permit term to January 31, 2028
SAM'S MARINA, Perryville: MDG999399, minor permit, permit term to July 30, 2026

What the register holds for TIDEWATER MARINA: its NPDES ID, its permit type and status, its dates, its address in Havre De Grace, Maryland. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MDG999378.

Identity

Facility as filed	TIDEWATER MARINA
Permittee as filed	Tidewater / Havre de Grace, Inc.
NPDES ID	MDG999378
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	January 23, 2018
Expiration date	July 31, 2026
Issuing agency	MARYLAND DEPARTMENT OF THE ENVIRONMENT
Address	Havre De Grace, MD 21078
Receiving water impaired	303(D) Listed
Subwatershed	Rock Run-Susquehanna River (HUC 020503061713)
Other EPA IDs (FRS)	RCRA handler MDR000018275

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 MDG999378.

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES MDG999378.

Inspections

EPA’s inspection file holds no inspection for NPDES MDG999378.

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES MDG999378.

Watch this permit

One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, MDG999378.

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Nearby on the register

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

Of all 71 general permit coverages in Harford County, including this permit, 28.2% were issued before TIDEWATER MARINA's permit. Of those 71 Harford County coverages, 32.4% have a violation on file. The Rock Run-Susquehanna River subwatershed lists 13 NPDES permits, including this permit.