Clean Water Act discharge permit · NPDES MAR10068X

PROPOSED SELF-STORAGE FACILITY EXPANSION, Westport, MA: NPDES MAR10068X discharge permit, effluent exceedances, inspections, penalties

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

PROPOSED SELF-STORAGE FACILITY EXPANSION, held by Mackady, LLC, holds NPDES permit MAR10068X. EPA’s file records it issued March 31, 2026 and expiring February 16, 2027.

PROPOSED SELF-STORAGE FACILITY EXPANSION, Westport, Massachusetts: Coverage under a general permit MAR10068X, held by Mackady, LLC; Construction stormwater; Effective; issued March 31, 2026, term to February 16, 2027, by U.S. EPA.

Massachusetts holds 3,320 Construction stormwater coverages of this permit type in EPA’s file; 2,955 were issued before MAR10068X.

Coverages issued nearest MAR10068X

March 27, 2026: READING CENTER FOR ACTIVE LIVING, Reading, MAR10068Q, held by J&J Contractors
March 27, 2026: LUDLOW CONSTRUCTION: SOUTHBRIDGE, MA - RIVER STREET PHASE II UPGRADES, Southbridge, MAR10068R, held by Ludlow Construction Co.
March 27, 2026: 101 HIGH STREET, WESTWOOD - RESIDENTIAL DEVELOPMENT, Westwood, MAR10068S, held by Supreme Development, Inc.
March 30, 2026: NEW BEDFORD FOSS MARINE TERMINAL LLC, New Bedford, MAR10068T, held by D.W. White Construction, Inc.
March 30, 2026: CHICK-FIL-A - DANVERS, MA, Danvers, MAR10068U, held by Chick-Fil-A
March 31, 2026: NASHAWANNUCK BROOK ECOLOGICAL RESTORATION & ACCESS IMPROVEMENTS, Northampton, MAR10069A, held by SumCo Eco-Contracting
April 3, 2026: CENTRAL ELEMENTARY SCHOOL, East Bridgewater, MAR10068F, held by Gilbane Building Company
April 3, 2026: 138 WASHINGTON STREET CONTRACTOR STORAGE DEVELOPMENT, Foxborough, MAR100692, held by Ryan Lenhart
April 6, 2026: COPPAGE DRIVE BUILDING ADDITION, Worcester, MAR10068A, held by CRE Management, LLC
April 6, 2026: MYOPIA HUNT CLUB - MAINTENANCE FACILITY, South Hamilton, MAR10068G, held by Jonathan Wilber

PROPOSED SELF-STORAGE FACILITY EXPANSION among its neighbors

EPA’s permit file holds 18 discharge permits in the Westport River-Frontal Rhode Island Sound subwatershed (HUC 010900020502), MAR10068X among them.

Other permits in the Westport River-Frontal Rhode Island Sound subwatershed (HUC 010900020502)

0 BROOKWOOD DRIVE SOLAR, Westport: MAR100330, minor permit, permit term to February 15, 2022
0 ROUTE 88 SULLIVAN DRIVE SOLAR ARRAY PROJECT, Westport: MAR1004DD, minor permit, permit term to February 16, 2027
202 PINE HILL ROAD SOLAR I LLC, Westport: MAR1003A7, minor permit, permit term to February 15, 2022
978 SOLAR DEVELOPMENT, LLC. C/O STANDARD SOLAR INC., Westport: MAR1004YN, minor permit, permit term to February 16, 2027
ARNOLD'S AUTO PARTS, Tiverton: RIR50M014, minor permit, discharging to NARRAGANSETT BAY, permit term to May 2, 2024
EVERSOURCE DER - DARTMOUTH AND WESTPORT, Westport: MAR100698, minor permit, permit term to February 16, 2027
FRANCIS ESTATES, Westport: MAR1006C3, minor permit, permit term to February 16, 2027
GENERAL AUTO RECYCLING INC, Tiverton: RIRND0013, minor permit, permit term to December 31, 2100
MID CITY SCRAP IRON & SALVAGE COMPANY, Westport: MAR05CZ43, not classed
PLAZA 549, Westport: MAR10046T, minor permit, permit term to February 16, 2027

What the register holds for PROPOSED SELF-STORAGE FACILITY EXPANSION: its NPDES ID, its permit type and status, its dates, its address in Westport, Massachusetts. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MAR10068X.

Identity

Facility as filed	PROPOSED SELF-STORAGE FACILITY EXPANSION
Permittee as filed	Mackady, LLC
NPDES ID	MAR10068X
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	March 31, 2026
Expiration date	February 16, 2027
Issuing agency	U.S. EPA
Address	Westport, MA 02790
Receiving water impaired	303(D) Listed
Subwatershed	Westport River-Frontal Rhode Island Sound (HUC 010900020502)

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 MAR10068X.

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES MAR10068X.

Inspections

EPA’s inspection file holds no inspection for NPDES MAR10068X.

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 MAR10068X.

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, MAR10068X.

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Nearby on the register

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

The PROPOSED SELF-STORAGE FACILITY EXPANSION permit, held by Mackady, LLC, is one of 13 storm water construction permits in Westport, Massachusetts, and 0.0% of those 13 carry a violation on file. Among those 13 Westport storm water construction permits, 76.9% were issued earlier than this one, and it sits among 15 NPDES permits in the Westport River-Frontal Rhode Island Sound subwatershed.