Clean Water Act discharge permit · NPDES MAG590016

ATHOL W W T P, Athol, MA: NPDES MAG590016 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
65Pollutants under a numeric limit
3Pollutants with an effluent exceedance

ATHOL W W T P, held by ATHOL WWTP, holds NPDES permit MAG590016, which discharges to Millers River. EPA’s file records it issued September 28, 2022 and expiring October 31, 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.

Identity

Facility as filed	ATHOL W W T P
Permittee as filed	ATHOL WWTP
NPDES ID	MAG590016
Permit status	Effective
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	September 28, 2022
Expiration date	October 31, 2027
Address	Athol, MA 01331
Receiving water	MILLERS RIVER
Receiving water impaired	303(D) Listed
Subwatershed	Beaver Brook-Millers River (HUC 010802020204)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

65Pollutants on file
65Under a numeric limit
54With a violation of any kind
3With 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; the 60 with the most exceedances of 65 are shown.

Pollutant or measure	Limits	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
Lead, total [as Pb]	3	7	2	November 30, 2023	40% over the limit
Copper, total [as Cu]	4	11	1	October 31, 2025	31% over the limit
Phosphorus, total [as P]	3	6	1	September 30, 2025	29% over the limit
BOD, 5-day, 20 deg. C	6	30	0
Solids, total suspended	6	30	0
Nitrogen, total [as N]	4	20	0
Flow, in conduit or thru treatment plant	3	15	0
Nitrogen, Kjeldahl, total [as N]	4	10	0
Nitrite + Nitrate total [as N]	4	10	0
pH	3	10	0
Perfluorooctanoic acid (PFOA)	3	6	0
Perfluorobutanoic acid (PFBA)	3	6	0
Perfluorooctanesulfonamide (PFOSA)	3	6	0
Perfluoropentanoic acid (PFPeA)	3	6	0
Perfluorohexanoic acid (PFHxA)	3	6	0
Perfluoroheptanoic acid (PFHpA)	3	6	0
Perfluorononanoic acid (PFNA)	3	6	0
Perfluorodecanoic acid (PFDA)	3	6	0
Perfluoroundecanoic acid (PFUnA)	3	6	0
Perfluorododecanoic acid (PFDoA)	3	6	0
Perfluorotridecanoic acid (PFTrDA)	3	6	0
Perfluorotetradecanoic acid (PFTeDA)	3	6	0
N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE)	3	6	0
N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE)	3	6	0
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)	3	6	0
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)	3	6	0
Perfluorobutanesulfonic acid (PFBS)	3	6	0
Perfluorodecanesulfonic acid (PFDS)	3	6	0
Perfluoroheptanesulfonic acid (PFHpS)	3	6	0
Perfluorohexanesulfonic acid (PFHxS)	3	6	0
Perfluorooctanesulfonic acid (PFOS)	3	6	0
1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS)	3	6	0
1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS)	3	6	0
1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS)	3	6	0
Perfluoropentanesulfonic acid (PFPeS)	3	6	0
Perfluorononanesulfonic acid (PFNS)	3	6	0
Hexafluoropropylene oxide dimer acid (HFPO-DA)	3	6	0
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)	3	6	0
Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)	3	6	0
Perfluorododecanesulfonic acid (PFDoS)	3	6	0
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)	3	6	0
N-methyl perfluorooctanesulfonamide (NMeFOSA)	3	6	0
N-ethyl perfluorooctanesulfonamide (NEtFOSA)	3	6	0
3-Perfluoropropyl propanoic acid (3:3 FTCA)	3	6	0
Perfluoro-3-methoxypropanoic acid (PFMPA)	3	6	0
9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)	3	6	0
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)	3	6	0
3-Perfluoroheptyl propanoic acid (7:3 FTCA)	3	6	0
Perfluoro-4-methoxybutanoic acid (PFMBA)	3	6	0
2H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA)	3	6	0
E. coli	2	6	0
BOD, 5-day, percent removal	1	5	0
Solids, suspended percent removal	1	5	0
Oxygen, dissolved [DO]	1	3	0
Nitrogen, ammonia total [as N]	2	0	0
Carbon, tot organic [TOC]	2	0	0
Hardness, total [as CaCO3]	2	0	0
Cadmium, total [as Cd]	2	0	0
Nickel, total [as Ni]	2	0	0
Zinc, total [as Zn]	2	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 MAG590016.

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 MAG590016 there.

Nearby on the register

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

This public-records page covers Clean Water Act discharge permit NPDES MAG590016 for ATHOL W W T P in Athol, MA, which discharges to Millers River and lies within the Beaver Brook-Millers River subwatershed (HUC 010802020204). The page lists 65 pollutants on file, 54 under a numeric limit, 3 with an effluent exceedance, and 54 with a violation of any kind.