Clean Water Act discharge permit · NPDES MTX000121

AQUAFLO LLC - SKYVIEW AND NORTHWEST SUBDIVISIONS COMMUNITY WWTS, Helena, MT: NPDES MTX000121 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
10Pollutants under a numeric limit
1Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

AQUAFLO LLC - SKYVIEW AND NORTHWEST SUBDIVISIONS COMMUNITY WWTS, held by AQUAFLO LLC, holds NPDES permit MTX000121, which discharges to Class I Ground Water. EPA’s file records it issued June 29, 2010 and expiring July 31, 2015.

AQUAFLO LLC - SKYVIEW AND NORTHWEST SUBDIVISIONS COMMUNITY WWTS, Helena, Montana: State-issued individual permit MTX000121, held by AQUAFLO LLC; Administratively continued (past its expiration date and still in force until reissued); issued June 29, 2010, term to July 31, 2015, by MONTANA DEQ; discharges to CLASS I GROUND WATER.

Nitrogen, total [as N]: 4 limits, 125 violations of any kind, 108 effluent exceedances, latest May 31, 2018, largest 185% over the limit.
Phosphorus, total [as P]: 2 limits, 21 violations of any kind, 0 effluent exceedances.
Flow rate: 2 limits, 18 violations of any kind, 0 effluent exceedances.
Solids, total suspended: 1 limit, 8 violations of any kind, 0 effluent exceedances.
BOD, 5-day, 20 deg. C: 1 limit, 7 violations of any kind, 0 effluent exceedances.
Nitrogen, ammonia total [as N]: 1 limit, 7 violations of any kind, 0 effluent exceedances.
Nitrogen, Kjeldahl, total [as N]: 1 limit, 7 violations of any kind, 0 effluent exceedances.
Nitrite + Nitrate total [as N]: 1 limit, 7 violations of any kind, 0 effluent exceedances.
Chloride [as Cl]: 1 limit, 7 violations of any kind, 0 effluent exceedances.
E. coli, MTEC-MF: 2 limits, 4 violations of any kind, 0 effluent exceedances.
Conductivity: 0 limits, 4 violations of any kind, 0 effluent exceedances.

AQUAFLO LLC - SKYVIEW AND NORTHWEST SUBDIVISIONS COMMUNITY WWTS among its neighbors

EPA’s permit file holds 17 discharge permits in the Lower Silver Creek subwatershed (HUC 100301011503), MTX000121 among them. Its county holds 238, 2 of them major permits; MTX000121 is a minor permit.

Other permits in the Lower Silver Creek subwatershed (HUC 100301011503)

APPLEGATE MEADOWS SUBDIVISION, Helena: MTX000176, minor permit, discharging to CLASS II GOUND WATER, permit term to June 30, 2019
BOB'S VALLEY MARKET ACE HARDWARE, Helena: MTR111500, minor permit, discharging to HELENA VALLEY CANAL, permit term to December 31, 2027
BRIDGE CREEK ESTATES, Helena: MTX000141, minor permit, discharging to CLASS I GROUND WATER, permit term to May 31, 2016
BRIDGE CREEK ESTATES, Helena: MTX000345, not classed, discharging to GROUND WATER
ENVIRONMENTALLY SUSTAINABLE DEVELOPMENT LLC LINCOLN HEIGHTS WWTP, Helena: MTX000186, not classed, discharging to SILVER CREEK
FREEDOM FABRICATION & EXCAVATION, Helena: MTR111798, not classed, discharging to LAKE HELENA
FRONTIER BUILDERS - TIMBER WORKS ESTATES SUBDIVISION PH II - VIII, Helena: MTR104472, minor permit, discharging to SILVER CREEK, permit term to December 31, 2012
GARDEN VALLEY SUBDIVISION, Helena: MTR106420, minor permit, discharging to UPPER MISSOURI, permit term to December 31, 2017
GOLDEN MEADOWS SUBDIVISION, Helena: MTR108693, minor permit, discharging to HELENA VALLEY CANAL, permit term to December 31, 2022
GREEN MEADOW DR AND LINCOLN ROAD ROUNDABOUT PROJECT, Helena: MTR106763, minor permit, discharging to Upper Missouri, permit term to December 31, 2017

Identity

Facility as filed	AQUAFLO LLC - SKYVIEW AND NORTHWEST SUBDIVISIONS COMMUNITY WWTS
Permittee as filed	AQUAFLO LLC
NPDES ID	MTX000121
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	State-issued individual permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	June 29, 2010
Expiration date	July 31, 2015
Issuing agency	MONTANA DEQ
Address	Helena, MT 59601
Receiving water	CLASS I GROUND WATER
Subwatershed	Lower Silver Creek (HUC 100301011503)
SIC	4952 – Sewerage Systems

Effluent limits and exceedances

11Pollutants on file
10Under a numeric limit
11With a violation of any kind
1With 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
Nitrogen, total [as N]	4	125	108	May 31, 2018	185% over the limit
Phosphorus, total [as P]	2	21	0
Flow rate	2	18	0
Solids, total suspended	1	8	0
BOD, 5-day, 20 deg. C	1	7	0
Nitrogen, ammonia total [as N]	1	7	0
Nitrogen, Kjeldahl, total [as N]	1	7	0
Nitrite + Nitrate total [as N]	1	7	0
Chloride [as Cl]	1	7	0
E. coli, MTEC-MF	2	4	0
Conductivity	0	4	0

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES MTX000121.

Inspections

EPA’s inspection file holds no inspection for NPDES MTX000121.

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES MTX000121.

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Nearby on the register

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

This public-records page covers NPDES permit MTX000121, held by AQUAFLO LLC for the Skyview and Northwest Subdivisions community wastewater treatment system in Helena, MT, which discharges to Class I Ground Water. The permit is administratively continued, with a Minor discharger class, 10 pollutants under a numeric limit, and 1 pollutant with an effluent exceedance.