Clean Water Act discharge permit · NPDES MA0101001

MAYNARD WASTEWATER TREATMENT FACILITY, Maynard, MA: NPDES MA0101001 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MajorDischarger class
16Pollutants under a numeric limit
12Pollutants with an effluent exceedance

MAYNARD WASTEWATER TREATMENT FACILITY, held by MAYNARD W W T F, holds NPDES permit MA0101001, which discharges to Assabet River. EPA’s file records it issued May 26, 2005 and expiring October 31, 2010. 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	MAYNARD WASTEWATER TREATMENT FACILITY
Permittee as filed	MAYNARD W W T F
NPDES ID	MA0101001
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	May 26, 2005
Expiration date	October 31, 2010
Address	Maynard, MA 01754
Receiving water	ASSABET RIVER
Receiving water impaired	303(D) Listed
Subwatershed	Elizabeth Brook-Assabet River (HUC 010700050204)
Program components on file	POTW, Pretreatment
SIC	4952 – Sewerage Systems
Other EPA IDs (FRS)	RCRA handler MAC300102241

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

17Pollutants on file
16Under a numeric limit
16With a violation of any kind
12With 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
Chlorine, total residual	2	37	35	June 30, 2016	78,471% over the limit
Coliform, fecal general	2	30	28	September 30, 2017	99,999% over the limit
pH	2	21	19	October 31, 2016
Phosphorus, total [as P]	24	22	17	October 31, 2016	930% over the limit
Copper, total [as Cu]	2	19	17	February 28, 2014	30,981% over the limit
Solids, total suspended	7	20	13	February 28, 2011	160% over the limit
Solids, suspended percent removal	1	7	6	April 30, 2010	517% over the limit
Flow, in conduit or thru treatment plant	3	13	5	April 30, 2005	16% over the limit
BOD, 5-day, percent removal	1	6	5	March 31, 2010	53% over the limit
LC50 Static 48Hr Acute Ceriodaphnia dubia	1	8	3	September 30, 2022	64% over the limit
BOD, 5-day, 20 deg. C	7	24	2	April 30, 2010	126% over the limit
E. coli, colony forming units [CFU]	0	1	1	October 31, 2020	50% over the limit
NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia	1	5	0
Aluminum, total [as Al]	1	2	0
Nitrogen, ammonia total [as N]	3	1	0
Oxygen, dissolved [DO]	1	1	0
Phosphate, ortho, dissolved [as P]	4	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 MA0101001.

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

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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 MA0101001 there.

Nearby on the register

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

This public-records page covers the NPDES MA0101001 Clean Water Act discharge permit for the MAYNARD WASTEWATER TREATMENT FACILITY in Maynard, MA, which is an administratively continued major discharger that discharges to the ASSABET RIVER. The page lists 16 pollutants under a numeric limit and 12 pollutants with an effluent exceedance, and records the permit as issued May 26, 2005 and expiring October 31, 2010.