Clean Water Act discharge permit · NPDES MAR1005X2

EVERSOURCE ROCHESTER SUBSTATION, Rochester, MA: NPDES MAR1005X2 discharge permit, effluent exceedances, inspections, penalties

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

EVERSOURCE ROCHESTER SUBSTATION, held by NSTAR Electric Company d/b/a Eversource Energy, holds NPDES permit MAR1005X2. EPA’s file records it issued August 29, 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 EVERSOURCE ROCHESTER SUBSTATION: its NPDES ID, its permit type and status, its dates, its address in Rochester, Massachusetts. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MAR1005X2.

Identity

Facility as filed	EVERSOURCE ROCHESTER SUBSTATION
Permittee as filed	NSTAR Electric Company d/b/a Eversource Energy
NPDES ID	MAR1005X2
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 29, 2025
Expiration date	February 16, 2027
Issuing agency	U.S. EPA
Address	Rochester, MA 02770
Subwatershed	Mattapoisett River-Frontal Buzzards Bay (HUC 010900020306)

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 MAR1005X2.

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 MAR1005X2.

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, MAR1005X2.

Start the watch

How we handle your data → Privacy

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 MAR1005X2 there.

Nearby on the register

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

The EVERSOURCE ROCHESTER SUBSTATION storm water construction permit, MAR1005X2, is one of 13 such permits on EPA's NPDES register in Rochester, Massachusetts, and one of 26 NPDES permits in the Mattapoisett River-Frontal Buzzards Bay subwatershed. Of the 13 Rochester storm water construction permits, 0.0% have a violation on file, and this permit has no pollutants under a numeric limit and no effluent exceedances recorded against it.