Clean Water Act discharge permit · NPDES MAR100550

23 LAUREL STREET, NORTHAMPTON, MA, Northampton, MA: NPDES MAR100550 discharge permit, effluent exceedances, inspections, penalties

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

23 LAUREL STREET, NORTHAMPTON, MA, held by Allegrone Companies, holds NPDES permit MAR100550. EPA’s file records it issued April 5, 2024 and expiring February 16, 2027. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

What the register holds for 23 LAUREL STREET, NORTHAMPTON, MA: its NPDES ID, its permit type and status, its dates, its address in Northampton, Massachusetts. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MAR100550.

Identity

Facility as filed	23 LAUREL STREET, NORTHAMPTON, MA
Permittee as filed	Allegrone Companies
NPDES ID	MAR100550
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	April 5, 2024
Expiration date	February 16, 2027
Issuing agency	U.S. EPA
Address	Northampton, MA 01060
Subwatershed	Mill River (HUC 010802010606)

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 MAR100550.

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 MAR100550.

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.

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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 MAR100550 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

The permit filed as 23 LAUREL STREET, NORTHAMPTON, MA, held by Allegrone Companies under NPDES ID MAR100550, is one of 21 storm water construction permits on EPA's NPDES register in Northampton, Massachusetts, this one included. Of those 21 Northampton storm water construction permits, 0.0% have a violation on file, and 42.9% carry an earlier issue date than this one, which was issued April 5, 2024. This permit sits among 25 NPDES permits in the Mill River subwatershed (HUC 010802010606), this one included, and it records 0 pollutants under a numeric limit and 0 pollutants with an effluent exceedance.