Clean Water Act discharge permit · NPDES PAC230327

MARKHAM DEVELOPERS, LLC, Concord, Township Of, PA: NPDES PAC230327 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
0Pollutants under a numeric limit
0Pollutants with an effluent exceedance
1Inspections on file
0Formal enforcement actions

MARKHAM DEVELOPERS, LLC, held by Markham Developers, LLC, holds NPDES permit PAC230327. EPA’s file records it issued September 9, 2025 and expiring December 7, 2029.

MARKHAM DEVELOPERS, LLC, Concord, Township Of, Pennsylvania: Coverage under a general permit PAC230327, held by Markham Developers, LLC; Construction stormwater; Effective; issued September 9, 2025, term to December 7, 2029, by Delaware County Conservation District.

September 15, 2026: Reconnaissance without Sampling (S).

Pennsylvania holds 4,048 Construction stormwater coverages of this permit type in EPA’s file; 3,206 were issued before PAC230327.

Coverages issued nearest PAC230327

September 8, 2025: LAKE GLORY CAMPGROUND IMPROVEMENTS, Cleveland, Township Of, PAC190101, held by H. H. Knoebel Sons Inc.
September 8, 2025: HEGE SHALE PIT RESTORATION, Southampton, Township Of, PAC280421, held by Arlin Hege
September 8, 2025: SANDY CREEK NO. 1, Covington, Township Of, PAC680079, held by PA DEP BAMR
September 9, 2025: SOLAR DEVELOPMENT - EAST PROVIDENCE II, East Providence, Township Of, PAC050089, held by Bear Peak East Providence LLC
September 9, 2025: SENECA TRAILS 1B (WILLIAMS PROPERTY), Jackson, Township Of, PAC100360, held by Seneca Trails, LLC
September 9, 2025: 5 MURRAY LANE, Radnor, Township Of, PAC230339, held by Stephanie Phillips
September 9, 2025: WARNER TRACT, West Manheim, PAC670810, held by PA Hanover Warner Farm LLC
September 10, 2025: PANTHER VALLEY SELF STORAGE, Lansford, Borough Of, PAC130030, held by Panther Valley Self Storage
September 10, 2025: CHELSEA ESTATES, East Pennsboro, Township Of, PAC210396, held by Enola Development LLC
September 11, 2025: GAP TRAIL HILLSIDE STABILIZATION PROJECT, West Mifflin, Borough Of, PAC021235, held by Regional Trail Corporation

MARKHAM DEVELOPERS, LLC among its neighbors

EPA’s permit file holds 33 discharge permits in the West Branch Chester Creek subwatershed (HUC 020402020604), PAC230327 among them. Its county holds 270, 2 of them major permits; PAC230327 is a minor permit.

Other permits in the West Branch Chester Creek subwatershed (HUC 020402020604)

1540, 1546, 1550 WILMINGTON PIKE, Chadds Ford, Township Of: PAC230275, minor permit, permit term to December 7, 2024
199 WILMINGTON WEST CHESTER PIKE, Chadds Ford: PAC230297, minor permit, permit term to December 7, 2029
282&286 DILWORTHTOWN ROAD, West Chester: PAC230260, minor permit, permit term to December 7, 2024
400 SMITHBRIDGE ROAD, Concord, Township Of: PAC230211, minor permit, permit term to December 7, 2024
BELMONT PHASE III, Garnet Valley: PAC230331, minor permit, permit term to December 7, 2029
BIRMINGHAM TWP MS4, West Chester: PAI130036, minor permit, discharging to West Branch Chester Creek, permit term to November 30, 2029
BOOTH STATION IWTP, Boothwyn: PA0012467, minor permit, discharging to Green Creek, permit term to October 31, 2022
BRINTON MANOR STP, Glen Mills: PA0044474, minor permit, discharging to West Branch Chester Creek, permit term to May 31, 2025
CARMAN LINCOLN, Concord, Township Of: PAC230238, minor permit, permit term to December 7, 2024
CONCORD COUNTRY CLUB STP, Westchester: PA0031666, minor permit, discharging to UNT TO WEST BRANCH OF CHESTER CREEK, permit term to January 31, 2011

Identity

Facility as filed	MARKHAM DEVELOPERS, LLC
Permittee as filed	Markham Developers, LLC
NPDES ID	PAC230327
Permit status	Effective
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Program	Construction stormwater
Issued	September 9, 2025
Expiration date	December 7, 2029
Issuing agency	Delaware County Conservation District
Address	Concord, Township Of, PA 19342
Receiving water impaired	303(D) Listed
Subwatershed	West Branch Chester Creek (HUC 020402020604)

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 PAC230327.

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES PAC230327.

Inspections

Date	What EPA recorded	Agency
September 15, 2026	Reconnaissance without Sampling	S

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 PAC230327.

Watch this permit

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Nearby on the register

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

MARKHAM DEVELOPERS, LLC holds one of 176 storm water construction permits in Delaware County, with 88.1% of those permits issued earlier than this one. The permit is one of 33 NPDES permits in the West Branch Chester Creek subwatershed, and it has no pollutants under a numeric limit or effluent exceedances.