Clean Water Act discharge permit · NPDES MAR10063U

299 BROADWAY, Somerville, MA: NPDES MAR10063U 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

299 BROADWAY, held by 299 Broadway Property Owner LLC, holds NPDES permit MAR10063U. EPA’s file records it issued December 18, 2025 and expiring February 16, 2027.

299 BROADWAY, Somerville, Massachusetts: Coverage under a general permit MAR10063U, held by 299 Broadway Property Owner LLC; Construction stormwater; Effective; issued December 18, 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; 2,786 were issued before MAR10063U.

Coverages issued nearest MAR10063U

December 17, 2025: FRUIT STREET, HOPKINTON, Hopkinton, MAR10063O, held by Baypath Humane Society of Hopkinton, Inc.
December 18, 2025: 0 HIGH STREET & 38 GROTON HARVARD ROAD, Ayer, MAR10062F, held by Onyx Corporation
December 18, 2025: DANVERS LOGAN EXPRESS SITE WORK MPA CONTRACT NO. L1830-C3, Danvers, MAR10062X, held by Massachusetts Port Authority
December 18, 2025: STORMWATER DRAINAGE IMPROVEMENTS AT WACHUSETT RESERVOIR ON ROUTE 110, Sterling, MAR10063Q, held by MassDOT District 3
December 18, 2025: THE EXCHANGE SALEM, Salem, MAR10063S, held by WinnCompanies LLC
December 19, 2025: 21 COSLIN DRIVE BUILDING DEMOLITION, Southborough, MAR10063V, held by Construction Management & Builders, Inc.
December 22, 2025: FRUIT STREET, HOPKINTON, Hopkinton, MAR10063Z, held by R.P. Masiello, Inc.
December 23, 2025: LOWELL - ROURKE BRIDGE REPLACEMENT, Lowell, MAR100641, held by Massachusetts Department of Transportation
December 24, 2025: BARTLETT HOUSE, Eastham, MAR100635, held by Apex Abatement and Demolition LLC
December 25, 2025: C132397 RIFENBURG CONTRACTING: EGREMONT, MA - RECONSTRUCTION OF MT WASHINGTON RD, Egremont, MAR10063N, held by Rifenburg Contracting Corp.

299 BROADWAY among its neighbors

EPA’s permit file holds 157 discharge permits in the Mystic River-Frontal Boston Harbor subwatershed (HUC 010900010502), MAR10063U 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
35 GARVEY STREET, EVERETT MA 02149, Everett: MAR1003QR, minor permit, permit term to February 15, 2022
35 GREEN STREET, Malden: MAG912301, minor permit, permit term to August 1, 2027

What the register holds for 299 BROADWAY: its NPDES ID, its permit type and status, its dates, its address in Somerville, Massachusetts. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MAR10063U.

Identity

Facility as filed	299 BROADWAY
Permittee as filed	299 Broadway Property Owner LLC
NPDES ID	MAR10063U
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	December 18, 2025
Expiration date	February 16, 2027
Issuing agency	U.S. EPA
Address	Somerville, MA 02145
Receiving water impaired	303(D) Listed
Subwatershed	Mystic River-Frontal Boston Harbor (HUC 010900010502)

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 MAR10063U.

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES MAR10063U.

Inspections

EPA’s inspection file holds no inspection for NPDES MAR10063U.

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 MAR10063U.

Watch this permit

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Nearby on the register

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

The 299 BROADWAY storm water construction permit in Somerville, Massachusetts, is one of 12 such permits in that city on EPA's NPDES register, and 83.3% of those 12 were issued before it. Among the 157 NPDES permits in the Mystic River-Frontal Boston Harbor subwatershed, this one is counted alongside the rest, and none of the 12 Somerville storm water construction permits carries a violation on file, with 0.0% of them showing one.