Clean Water Act discharge permit · NPDES MD0061794

MAYO LARGE COMMUNAL W.R.F., Edgewater, MD: NPDES MD0061794 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
13Pollutants under a numeric limit
4Pollutants with an effluent exceedance

MAYO LARGE COMMUNAL W.R.F. holds NPDES permit MD0061794, which discharges to Rhode River. EPA’s file records it issued April 1, 2000 and expiring March 31, 2005. 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 filed	MAYO LARGE COMMUNAL W.R.F.
Permittee as filed	MAYO LARGE COMMUNAL W.R.F.
NPDES ID	MD0061794
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	April 1, 2000
Expiration date	March 31, 2005
Address	Edgewater, MD 21032
Receiving water	RHODE RIVER
Subwatershed	Rhode River-West River (HUC 020600040401)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

16Pollutants on file
13Under a numeric limit
11With a violation of any kind
4With 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
Nitrogen, total [as N]	0	8	7	December 31, 2017	95% over the limit
Phosphorus, total [as P]	4	11	4	December 31, 2017	13% over the limit
Nitrogen, ammonia total [as N]	2	5	1	February 28, 2015	29% over the limit
pH	2	1	1	June 30, 2006
Chlorine, total residual	1	5	0
Solids, total suspended	4	4	0
Flow, total	0	4	0
Flow, in conduit or thru treatment plant	1	2	0
Nitrite + Nitrate total [as N]	2	1	0
Coliform, fecal general	1	1	0
Phosphate, ortho [as P]	0	1	0
BOD, 5-day, 20 deg. C	8	0	0
Nitrogen, Kjeldahl, total [as N]	4	0	0
Nitrogen, organic total [as N]	2	0	0
Phosphorous, in total orthophosphate	2	0	0
Oxygen, dissolved [DO]	1	0	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 MD0061794.

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 MD0061794 there.

Nearby on the register

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

This public-records page covers NPDES permit MD0061794 for MAYO LARGE COMMUNAL W.R.F. in Edgewater, MD, which discharges to RHODE RIVER within the Rhode River-West River subwatershed (HUC 020600040401). The facts list 16 pollutants on file, 13 under a numeric limit, 11 with a violation of any kind, and 4 with an effluent exceedance.