Clean Water Act discharge permit · NPDES MD3544N06

RIVERWOOD PHASE II SEWAGE FACILITY, Ellicott City, MD: NPDES MD3544N06 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
0Pollutants under a numeric limit
5Pollutants with an effluent exceedance

RIVERWOOD PHASE II SEWAGE FACILITY holds NPDES permit MD3544N06, which discharges to Middle Patuxent River. EPA’s file records it issued May 1, 2007 and expiring April 30, 2012. 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	RIVERWOOD PHASE II SEWAGE FACILITY
Permittee as filed	RIVERWOOD PHASE II SEWAGE FACILITY
NPDES ID	MD3544N06
Permit status	Effective
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	May 1, 2007
Expiration date	April 30, 2012
Issuing agency	MARYLAND DEPARTMENT OF THE ENVIRONMENT
Address	Ellicott City, MD 21042
Receiving water	MIDDLE PATUXENT RIVER
Subwatershed	Upper Chester River (HUC 020600020406)
SIC	6552 – Subdividers And Developers

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

13Pollutants on file
0Under a numeric limit
13With a violation of any kind
5With 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	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
Coliform, fecal general	33	13	December 31, 2023	2,147,483,650% over the limit
Nitrogen, total [as N]	37	7	August 31, 2023	454% over the limit
Solids, total dissolved	22	2	December 31, 2023	67% over the limit
BOD, 5-day, 20 deg. C	12	2	May 31, 2022	3,033% over the limit
Solids, total suspended	11	1	May 31, 2019	123% over the limit
Nitrogen, Kjeldahl, total [as N]	30	0
pH	20	0
Phosphate, total [as PO4]	20	0
Chloride	20	0
Nitrogen, nitrate total [as NO3]	20	0
Nitrogen, nitrite total [as NO2]	20	0
Nitrite + Nitrate total [as N]	10	0
Flow	10	0

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 MD3544N06.

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 MD3544N06 there.

Nearby on the register

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

This public-records page covers NPDES permit MD3544N06 for the RIVERWOOD PHASE II SEWAGE FACILITY in Ellicott City, MD, which discharges to the MIDDLE PATUXENT RIVER and is listed with a status of Effective. The page lists a Minor discharger class, 5 pollutants with an effluent exceedance, and 13 pollutants on file.