Clean Water Act discharge permit · NPDES MA0005339

MT TOM STATION, Holyoke, MA: NPDES MA0005339 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MajorDischarger class
11Pollutants under a numeric limit
5Pollutants with an effluent exceedance

MT TOM STATION, held by MT TOM GENERATING COMPANY LLC, holds NPDES permit MA0005339, which discharges to Connecticut River. EPA’s file records it issued September 18, 1992 and expiring September 17, 1997. 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.

Identity

Facility as filed	MT TOM STATION
Permittee as filed	MT TOM GENERATING COMPANY LLC
NPDES ID	MA0005339
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Major discharger
Facility type	Not a publicly owned treatment works
Issued	September 18, 1992
Expiration date	September 17, 1997
Address	Holyoke, MA 01040
Receiving water	Connecticut River
Receiving water impaired	303(D) Listed
Subwatershed	Dry Brook-Connecticut River (HUC 010802010610)
Other EPA IDs (FRS)	RCRA handler MAD000846105

Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.

Effluent limits and exceedances

11Pollutants on file
11Under a numeric limit
9With a violation of any kind
5With an effluent exceedance

An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.

Pollutant or measure	Limits	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
Solids, total suspended	16	12	10	May 31, 2009	10,300% over the limit
Flow, in conduit or thru treatment plant	23	4	4	August 31, 2010	3% over the limit
pH	22	6	2	June 30, 2012
Iron, total [as Fe]	10	3	1	June 30, 2012	24% over the limit
Oxidants, total residual	2	1	1	May 31, 2013	20% over the limit
Oil & Grease	16	2	0
Copper, total [as Cu]	10	2	0
Nickel, total [as Ni]	10	2	0
Zinc, total [as Zn]	10	2	0
Temp. diff. between intake and discharge	2	0	0
Temperature, water deg. fahrenheit	1	0	0

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 MA0005339.

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 MA0005339 there.

Nearby on the register

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

This public-records page covers the NPDES discharge permit MA0005339 for MT TOM STATION in Holyoke, MA, held by MT TOM GENERATING COMPANY LLC, which discharges to the Connecticut River. The permit is listed as administratively continued, a Major Discharger class, with 11 pollutants under a numeric limit and 5 pollutants with an effluent exceedance. Its recorded issue date is September 18, 1992, and its expiration date is September 17, 1997.