Clean Water Act discharge permit · NPDES MDG498016

BYLER S&G, Mechanicsville, MD: NPDES MDG498016 discharge permit, effluent exceedances, inspections, penalties

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

BYLER S&G, held by Howlin Concrete, Inc., holds NPDES permit MDG498016, which discharges to Lower Patuxent River. EPA’s file records it issued December 1, 2011 and expiring April 30, 2015. 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	BYLER S&G
Permittee as filed	Howlin Concrete, Inc.
NPDES ID	MDG498016
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	December 1, 2011
Expiration date	April 30, 2015
Issuing agency	Maryland Department of The Environment
Address	Mechanicsville, MD 20659
Receiving water	Lower Patuxent River
Subwatershed	Trinity Church Run-Wicomico River (HUC 020700110501)

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

Effluent limits and exceedances

5Pollutants on file
5Under a numeric limit
5With 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
pH	2	136
Solids, total suspended	2	107
Flow, in conduit or thru treatment plant	2	106
pH change [range]	2	76
Solids, settleable	1	38

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MDG498016.

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 MDG498016.

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

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, MDG498016.

Start the watch

How we handle your data → Privacy

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 MDG498016 there.

Nearby on the register

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

This public-records page covers Clean Water Act discharge permit NPDES MDG498016 for BYLER S&G in Mechanicsville, MD, held by Howlin Concrete, Inc., which discharges to the Lower Patuxent River. The permit's status is listed as administratively continued, with a Minor discharger class, and the file shows 5 pollutants on file, 5 under a numeric limit, and 0 with an effluent exceedance.