Clean Water Act discharge permit · NPDES MAR10046T

PLAZA 549, Westport, MA: NPDES MAR10046T discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
0Pollutants under a numeric limit
0Pollutants with an effluent exceedance

PLAZA 549, held by 549 American Legion Highway Realty Trust, holds NPDES permit MAR10046T. EPA’s file records it issued August 18, 2022 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 PLAZA 549: 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 MAR10046T.

Identity

Facility as filed	PLAZA 549
Permittee as filed	549 American Legion Highway Realty Trust
NPDES ID	MAR10046T
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	August 18, 2022
Expiration date	February 16, 2027
Issuing agency	U.S. EPA
Address	Westport, MA 02790
Subwatershed	Westport River-Frontal Rhode Island Sound (HUC 010900020502)

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 MAR10046T.

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 MAR10046T.

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, MAR10046T.

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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 MAR10046T there.

Nearby on the register

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

PLAZA 549 in Westport, Massachusetts, is one of 13 storm water construction permits in the city on EPA's NPDES register, and it sits among 15 NPDES permits in the Westport River-Frontal Rhode Island Sound subwatershed, this one included. Of all 13 Westport storm water construction permits, 23.1% were issued before this one, and 0.0% of those 13 carry a violation on file. The permit records zero pollutants under a numeric limit and zero pollutants with an effluent exceedance.