Clean Water Act discharge permit · NPDES MT0030279
MONTANORE MINERALS CORP MONTANORE MINE, Libby, MT: NPDES MT0030279 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 34Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
MONTANORE MINERALS CORP MONTANORE MINE, held by MONTANORE MINERALS CORP, holds NPDES permit MT0030279, which discharges to Libby Creek & Alluvial Groundwater. EPA’s file records it issued January 17, 2017 and expiring February 28, 2022. 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 | MONTANORE MINERALS CORP MONTANORE MINE |
|---|---|
| Permittee as filed | MONTANORE MINERALS CORP |
| NPDES ID | MT0030279 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | January 17, 2017 |
| Expiration date | February 28, 2022 |
| Address | Libby, MT 59923 |
| Receiving water | LIBBY CREEK & ALLUVIAL GROUNDWATER |
| Subwatershed | Upper Libby Creek (HUC 170101010801) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 44Pollutants on file
- 34Under a numeric limit
- 23With 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 |
|---|---|---|---|---|---|
| Iron, dissolved [as Fe] | 0 | 12 | 2 | September 30, 2008 | 55% over the limit |
| Cadmium, dissolved [as Cd] | 0 | 10 | 0 | ||
| Chromium, dissolved [as Cr] | 0 | 10 | 0 | ||
| Copper, dissolved [as Cu] | 0 | 10 | 0 | ||
| Lead, dissolved [as Pb] | 0 | 10 | 0 | ||
| Manganese, dissolved [as Mn] | 0 | 10 | 0 | ||
| Zinc, dissolved [as Zn] | 0 | 10 | 0 | ||
| Mercury, dissolved [as Hg] | 0 | 10 | 0 | ||
| Nitrogen, inorganic total | 35 | 9 | 0 | ||
| Sulfate | 0 | 8 | 0 | ||
| Nitrogen, ammonia total [as N] | 23 | 6 | 0 | ||
| Nitrite + Nitrate total [as N] | 23 | 6 | 0 | ||
| pH | 17 | 6 | 0 | ||
| Zinc, total recoverable | 23 | 3 | 0 | ||
| Cadmium, total recoverable | 23 | 3 | 0 | ||
| Lead, total recoverable | 23 | 3 | 0 | ||
| Chromium, total recoverable | 23 | 3 | 0 | ||
| Copper, total recoverable | 23 | 3 | 0 | ||
| Manganese, total recoverable | 23 | 3 | 0 | ||
| Mercury, total recoverable | 23 | 3 | 0 | ||
| Flow rate | 16 | 3 | 0 | ||
| Discharge event observation [Visual Monitoring] | 0 | 3 | 0 | ||
| Iron, total recoverable | 23 | 2 | 0 | ||
| Nitrogen, total [as N] | 45 | 0 | 0 | ||
| Solids, total suspended | 41 | 0 | 0 | ||
| Phosphorus, total [as P] | 33 | 0 | 0 | ||
| Antimony, total recoverable | 23 | 0 | 0 | ||
| Solids, total dissolved [TDS] | 23 | 0 | 0 | ||
| Oil & Grease | 17 | 0 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 17 | 0 | 0 | ||
| Arsenic, total recoverable | 17 | 0 | 0 | ||
| Selenium, total recoverable | 17 | 0 | 0 | ||
| Thallium, total recoverable | 17 | 0 | 0 | ||
| Beryllium, total recoverable [as Be] | 17 | 0 | 0 | ||
| Nickel, total recoverable | 17 | 0 | 0 | ||
| Silver total recoverable | 17 | 0 | 0 | ||
| Aluminum, dissolved [as Al] | 17 | 0 | 0 | ||
| Temperature, water deg. fahrenheit | 10 | 0 | 0 | ||
| Chemical Oxygen Demand [COD] | 10 | 0 | 0 | ||
| Precipitation, total defined period/in | 5 | 0 | 0 | ||
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | 3 | 0 | 0 | ||
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | 3 | 0 | 0 | ||
| Temp. diff. between up/down stream deg. F | 2 | 0 | 0 | ||
| Hardness, total [as CaCO3] | 1 | 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
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| August 17, 2023 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
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 MT0030279 there.
Nearby on the register
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- Every permit record in Montana, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.