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Clean Water Act discharge permit · NPDES MAR1004WZ

STERLING PIT, Sterling, MA: NPDES MAR1004WZ discharge permit, effluent exceedances, inspections, penalties

STERLING PIT, held by Onyx Corporation, holds NPDES permit MAR1004WZ. EPA’s file records it issued November 27, 2023 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 STERLING PIT: its NPDES ID, its permit type and status, its dates, its address in Sterling, Massachusetts. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MAR1004WZ.

Identity

Facility as filedSTERLING PIT
Permittee as filedOnyx Corporation
NPDES IDMAR1004WZ
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
ProgramConstruction stormwater
IssuedNovember 27, 2023
Expiration dateFebruary 16, 2027
Issuing agencyU.S. EPA
AddressSterling, MA 01564
SubwatershedMonoosnoc Brook-North Nashua River (HUC 010700040103)

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

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES MAR1004WZ.

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

EPA’s single-event violation file, as loaded, holds no violation for NPDES MAR1004WZ.

Inspections

EPA’s inspection file holds no inspection for NPDES MAR1004WZ.

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 MAR1004WZ.

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 MAR1004WZ there.

STERLING PIT, Sterling, Massachusetts: Coverage under a general permit MAR1004WZ, held by Onyx Corporation; Construction stormwater; Effective; issued November 27, 2023, term to February 16, 2027, by U.S. EPA.

Massachusetts holds 3,320 Construction stormwater coverages of this permit type in EPA’s file; 1,546 were issued before MAR1004WZ. Onyx Corporation holds 17 permits in Massachusetts.

Other permits held by Onyx Corporation

Coverages issued nearest MAR1004WZ

STERLING PIT among its neighbors

66 discharge permits are in the Monoosnoc Brook-North Nashua River subwatershed (HUC 010700040103); MAR1004WZ is one.

Other permits in the Monoosnoc Brook-North Nashua River subwatershed (HUC 010700040103)

Nearby on the register

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

What this page shows

The STERLING PIT storm water construction permit (NPDES ID MAR1004WZ) is one of 14 such permits on EPA's NPDES register in Sterling, and 28.6% of those 14 were issued before it. Among the 66 NPDES permits in the Monoosnoc Brook-North Nashua River subwatershed, this permit is listed with no pollutants under a numeric limit and no effluent exceedances, and 0.0% of the Sterling storm water construction permits have a violation on file.