Clean Water Act discharge permit · NPDES MA0101290

HATFIELD W W T F, Hatfield, MA: NPDES MA0101290 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
11Pollutants under a numeric limit
9Pollutants with an effluent exceedance

HATFIELD W W T F, held by HATFIELD W W T P, holds NPDES permit MA0101290, which discharges to Connecticut River. EPA’s file records it issued April 27, 2006 and expiring June 26, 2011. 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.

Identity

Facility as filed	HATFIELD W W T F
Permittee as filed	HATFIELD W W T P
NPDES ID	MA0101290
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	April 27, 2006
Expiration date	June 26, 2011
Address	Hatfield, MA 01038
Receiving water	CONNECTICUT RIVER
Receiving water impaired	303(D) Listed
Subwatershed	Dry Brook-Connecticut River (HUC 010802010610)
Program components on file	Biosolids, POTW
SIC	4952 – Sewerage Systems

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.

Effluent limits and exceedances

17Pollutants on file
11Under a numeric limit
17With a violation of any kind
9With 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	7	47	27	February 28, 2015	251% over the limit
Chlorine, total residual	2	30	27	October 31, 2014	14,500% over the limit
BOD, 5-day, percent removal	1	27	26	July 31, 2015	360% over the limit
BOD, 5-day, 20 deg. C	7	39	21	April 30, 2014	127% over the limit
Solids, suspended percent removal	1	22	20	February 28, 2015	207% over the limit
E. coli, colony forming units [CFU]	0	17	15	July 31, 2021	218% over the limit
pH	2	11	9	August 31, 2014
Coliform, fecal general	2	6	5	July 31, 2011	99,999% over the limit
Flow, in conduit or thru treatment plant	3	11	1	March 31, 1999	48,900% over the limit
Nitrogen, Kjeldahl, total [as N]	1	13	0
Nitrogen, total [as N]	0	8	0
Nitrogen, ammonia total [as N]	0	8	0
Nitrogen, nitrite total [as N]	0	8	0
Nitrogen, nitrate total [as N]	0	8	0
Nitrite + Nitrate total [as N]	1	5	0
LC50 Static 48Hr Acute Ceriodaphnia dubia	1	2	0
Aluminum, total [as Al]	0	2	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 MA0101290.

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 MA0101290 there.

Nearby on the register

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

This public-records page covers the Clean Water Act discharge permit NPDES MA0101290, held by HATFIELD W W T P for the facility listed as HATFIELD W W T F in Hatfield, MA, which discharges to the Connecticut River. The permit is administratively continued, with a Minor discharger class, 11 pollutants under a numeric limit, and 9 pollutants with an effluent exceedance. The page reflects the permit file as loaded on October 14, 2026.