Clean Water Act discharge permit · NPDES MTG580034

TOWN OF NASHUA WWTF, Nashua, MT: NPDES MTG580034 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
10Pollutants under a numeric limit
0Pollutants with an effluent exceedance

TOWN OF NASHUA WWTF, held by TOWN OF NASHUA, holds NPDES permit MTG580034, which discharges to Milk River. EPA’s file records it issued December 27, 2017 and expiring December 31, 2022. 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	TOWN OF NASHUA WWTF
Permittee as filed	TOWN OF NASHUA
NPDES ID	MTG580034
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	December 27, 2017
Expiration date	December 31, 2022
Address	Nashua, MT 59248
Receiving water	MILK RIVER
Receiving water impaired	303(D) Listed
Subwatershed	Milk River-Nashua (HUC 100500121002)
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

20Pollutants on file
10Under a numeric limit
20With a violation of any kind
0With 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
BOD, 5-day, 20 deg. C	6	355
Solids, total suspended	4	261
Flow rate	3	127
pH	2	125
E. coli, MTEC-MF	4	122
Duration of discharge	1	70
BOD, 5-day, percent removal	1	57
Oil & Grease	1	49
Oil and grease visual	1	49
Nitrogen, ammonia total [as N]	0	36
Nitrogen, total [as N]	0	28
Nitrite + Nitrate total [as N]	0	28
Phosphorus, total [as P]	0	28
Chlorine, total residual	2	24
Nitrogen, Kjeldahl, total [as N]	0	20
Flow rate	0	10
Solids, suspended percent removal	0	8
Coliform, fecal general	0	4
Temperature, water deg. centigrade	0	3
Oil and grease, hexane extr method	0	3

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MTG580034.

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 MTG580034.

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 MTG580034 there.

Nearby on the register

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

This public-records page covers Clean Water Act discharge permit NPDES MTG580034 for the TOWN OF NASHUA WWTF, a publicly owned treatment works held by TOWN OF NASHUA, which discharges to the Milk River within the Milk River-Nashua watershed (HUC 100500121002). The page lists the permit as administratively continued, with a Minor discharger classification, 0 pollutants under a numeric limit, and 0 pollutants with an effluent exceedance, and it is dated against EPA's permit file as loaded on October 14, 2026.