Clean Water Act discharge permit · NPDES MTX000266

OPHIR SCHOOL, Gallatin Gateway, MT: NPDES MTX000266 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
17Pollutants under a numeric limit
0Pollutants with an effluent exceedance

OPHIR SCHOOL, held by Big Sky School District #72, holds NPDES permit MTX000266, which discharges to Ground Water. EPA’s file records it issued January 5, 2022 and expiring February 28, 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	OPHIR SCHOOL
Permittee as filed	Big Sky School District #72
NPDES ID	MTX000266
Permit status	Effective
Permit type	State-issued individual permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	January 5, 2022
Expiration date	February 28, 2027
Address	Gallatin Gateway, MT 59730
Receiving water	GROUND WATER
Receiving water impaired	303(D) Listed
Subwatershed	Gallatin River-Deer Creek (HUC 100200080306)

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

Effluent limits and exceedances

17Pollutants on file
17Under a numeric limit
17With 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
Nitrogen, total [as N]	6	36
Phosphorus, total [as P]	6	26
pH	4	24
Nitrogen, ammonia total [as N]	4	24
Nitrogen, Kjeldahl, total [as N]	4	24
Nitrite + Nitrate total [as N]	4	24
Flow rate	4	14
Temperature, water deg. centigrade	2	12
Conductivity	2	12
BOD, 5-day, 20 deg. C	2	12
Solids, total suspended	2	12
Oil & Grease	2	12
Chloride [as Cl]	2	12
E. coli, MTEC-MF	2	12
Nitrogen, total, percent removal [%]	2	12
Water level at sample collection time	2	12
Monitoring well level from the surface	2	12

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MTX000266.

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 MTX000266.

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, MTX000266.

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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 MTX000266 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 MTX000266 for OPHIR SCHOOL in Gallatin Gateway, MT, held by Big Sky School District #72, which discharges to GROUND WATER and sits in the Gallatin River-Deer Creek subwatershed (HUC 100200080306). The permit's status is Effective, issued January 5, 2022, and expiring February 28, 2027, with 17 pollutants on file, all under a numeric limit, and 0 with an effluent exceedance.