Clean Water Act discharge permit · NPDES MA0101311

GRAFTON WASTEWATER TREATMENT, So. Grafton, MA: NPDES MA0101311 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MajorDischarger class
15Pollutants under a numeric limit
13Pollutants with an effluent exceedance

GRAFTON WASTEWATER TREATMENT, held by GRAFTON W W T P, holds NPDES permit MA0101311, which discharges to Blackstone River. EPA’s file records it issued September 30, 1999 and expiring April 30, 2007. 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	GRAFTON WASTEWATER TREATMENT
Permittee as filed	GRAFTON W W T P
NPDES ID	MA0101311
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Major discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	September 30, 1999
Expiration date	April 30, 2007
Address	So. Grafton, MA 01560
Receiving water	BLACKSTONE RIVER
Subwatershed	Powerdmill Brook-Westfield River (HUC 010802060305)
Program components on file	POTW, Pretreatment
SIC	4952 – Sewerage Systems
Other EPA IDs (FRS)	RCRA handler MAV000010029; ICIS-AIR source MA0000002511801004

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.

Effluent limits and exceedances

19Pollutants on file
15Under a numeric limit
17With a violation of any kind
13With 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
E. coli, colony forming units [CFU]	0	45	45	August 31, 2017	379% over the limit
Enterococci	0	44	44	August 31, 2017	307% over the limit
Chlorine, total residual	2	38	36	April 30, 2010	95% over the limit
Flow, in conduit or thru treatment plant	1	27	26	June 30, 2013	46% over the limit
Nitrogen, ammonia total [as N]	9	23	17	November 30, 2013	198% over the limit
Phosphorus, total [as P]	9	14	13	June 30, 2014	390% over the limit
pH	2	13	11	July 31, 2007
Nitrogen, total [as N]	0	10	10	June 30, 2014	192% over the limit
Solids, total suspended	9	9	3	August 31, 2004	420% over the limit
Lead, total [as Pb]	0	2	2	April 30, 2016	144% over the limit
BOD, 5-day, 20 deg. C	6	11	1	November 30, 2000	996% over the limit
LC50 Static 48Hr Acute Ceriodaphnia dubia	1	7	1	June 30, 2009	37% over the limit
Oxygen, dissolved [DO]	1	4	1	June 30, 2000	10% over the limit
NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia	1	7	0
Nitrite + Nitrate total [as N]	1	1	0
BOD, 5-day, percent removal	1	1	0
Solids, suspended percent removal	1	1	0
BOD, carbonaceous [5 day, 20 C]	6	0	0
Coliform, fecal general	3	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 MA0101311.

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, MA0101311.

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 MA0101311 there.

Nearby on the register

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

This public-records page covers NPDES permit MA0101311 for GRAFTON WASTEWATER TREATMENT in So. Grafton, MA, held by GRAFTON W W T P and discharging to the BLACKSTONE RIVER, with the permit listed as administratively continued and classed as a Major Discharger. The page lists 15 pollutants under a numeric limit and 13 pollutants with an effluent exceedance, with the permit issued September 30, 1999 and expiring April 30, 2007.