Clean Water Act discharge permit · NPDES MAR1005K3

SUBSURFACE WORK FOR IMPROVEMENTS TO RYAN PLAYGROUND, CHARLESTOWN, Boston, MA: NPDES MAR1005K3 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

SUBSURFACE WORK FOR IMPROVEMENTS TO RYAN PLAYGROUND, CHARLESTOWN, held by Unified Contracting Inc., holds NPDES permit MAR1005K3. EPA’s file records it issued January 28, 2025 and expiring February 16, 2027. 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.

What the register holds for SUBSURFACE WORK FOR IMPROVEMENTS TO RYAN PLAYGROUND, CHARLESTOWN: its NPDES ID, its permit type and status, its dates, its address in Boston, Massachusetts. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MAR1005K3.

Identity

Facility as filed	SUBSURFACE WORK FOR IMPROVEMENTS TO RYAN PLAYGROUND, CHARLESTOWN
Permittee as filed	Unified Contracting Inc.
NPDES ID	MAR1005K3
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	January 28, 2025
Expiration date	February 16, 2027
Issuing agency	U.S. EPA
Address	Boston, MA 02129
Receiving water impaired	303(D) Listed
Subwatershed	Mystic River-Frontal Boston Harbor (HUC 010900010502)

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

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 MAR1005K3.

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 MAR1005K3.

Inspections

EPA’s inspection file holds no inspection for NPDES MAR1005K3.

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 MAR1005K3.

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 MAR1005K3 there.

SUBSURFACE WORK FOR IMPROVEMENTS TO RYAN PLAYGROUND, CHARLESTOWN, Boston, Massachusetts: Coverage under a general permit MAR1005K3, held by Unified Contracting Inc.; Construction stormwater; Effective; issued January 28, 2025, term to February 16, 2027, by U.S. EPA.

Massachusetts holds 3,320 Construction stormwater coverages of this permit type in EPA’s file; 2,197 were issued before MAR1005K3.

Coverages issued nearest MAR1005K3

January 23, 2025: CAMBRIDGE CROSSING - LOT L & LOT M, Cambridge, MAR1005JX, held by DivcoWest Real Estate Asset Management, Inc.
January 23, 2025: CAMBRIDGE CROSSING - LOT A, LOT B, LOT C, LOT D, PARCEL 1-D & PARK 1, Cambridge, MAR1005JY, held by DivcoWest Real Estate Asset Management, Inc.
January 23, 2025: CAMBRIDGE CROSSING - LOT R, Cambridge, MAR1005JZ, held by DivcoWest Real Estate Asset Management, Inc.
January 24, 2025: THE LOFTS AT KETTLE BROOK FALLS, LLC, Worcester, MAR1005K0, held by The Lofts at Kettle Brook Falls, LLC
January 27, 2025: DOUGLAS ROAD WET WEATHER FLOOD RELIEF TANK, Lowell, MAR1005K1, held by Waterline Industries Corporation
January 28, 2025: FIELDS CORNER LIBRARY, Boston, MAR1005K4, held by J&J Contractors
January 28, 2025: WATER RESOURCE RECOVERY FACILITY, South Dennis, MAR1005K5, held by MWH Constructors, Inc.
January 29, 2025: SINGLE-FAMILY HOME AND ACCESS/UTILITIES 63 WEST STREET, BEVERLY, MA, Beverly, MAR1005K6, held by 63 West Street, LLC
January 30, 2025: RESIDENCE INN NORTHSHORE MALL, Peabody, MAR1005K7, held by Callahan, Inc.
January 30, 2025: MDR CONSTRUCTION CO. INC: SHREWSBURY, MA - MT. VIEW CEMETERY EXPANSION PROJECT, Shrewsbury, MAR1005K8, held by MDR Construction Co., Inc.

SUBSURFACE WORK FOR IMPROVEMENTS TO RYAN PLAYGROUND, CHARLESTOWN among its neighbors

EPA’s permit file holds 157 discharge permits in the Mystic River-Frontal Boston Harbor subwatershed (HUC 010900010502), MAR1005K3 among them.

Other permits in the Mystic River-Frontal Boston Harbor subwatershed (HUC 010900010502)

0 SOUTH FARM ROAD, Everett: MAG912155, minor permit, permit term to August 1, 2027
10 & 20 EXECUTIVE DRIVE, STONEHAM, Stoneham: MAR1005SA, minor permit, permit term to February 16, 2027
100, 125, 150 CAMBRIDGEPARK DRIVE, Cambridge: MAR1002G8, minor permit, permit term to February 15, 2022
101 SMITH PLACE, Cambridge: MAR10037T, minor permit, permit term to February 15, 2022
1165R MASS AVE RESIDENTIAL DEVELOPMENT, Arlington: MAR1003QJ, minor permit, permit term to February 15, 2022
128 SPRING STREET, Everett: MAR1005EI, minor permit, permit term to February 16, 2027
142 MYSTIC AVENUE MEDFORD MA, Medford: MAR1004RK, minor permit, permit term to February 16, 2027
212 BEACHAM STREET EVERETT, MA, Everett: MAR1004Y1, minor permit, permit term to February 16, 2027
299 BROADWAY, Somerville: MAR10063U, minor permit, permit term to February 16, 2027
35 GARVEY STREET, EVERETT MA 02149, Everett: MAR1003QR, minor permit, permit term to February 15, 2022

Nearby on the register

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

SUBSURFACE WORK FOR IMPROVEMENTS TO RYAN PLAYGROUND, CHARLESTOWN sits among 111 storm water construction permits in Boston, and 0.0% of them have a violation on file. The Mystic River-Frontal Boston Harbor subwatershed holds 157 NPDES permits on the register, including this permit. Of the 111 Boston storm water construction permits, 63.1% carry an earlier issue date than this permit.