Clean Water Act discharge permit · NPDES MTR000524
M&W MILLING AND REFINING, Virginia City, MT: NPDES MTR000524 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 15Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
M&W MILLING AND REFINING, held by M AND W MILLING AND REFINING, holds NPDES permit MTR000524, which discharges to Prospect Gulch. EPA’s file records it issued April 16, 2018 and expiring January 31, 2023. 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 | M&W MILLING AND REFINING |
|---|---|
| Permittee as filed | M AND W MILLING AND REFINING |
| NPDES ID | MTR000524 |
| 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 | Not a publicly owned treatment works |
| Program | Industrial stormwater |
| Issued | April 16, 2018 |
| Expiration date | January 31, 2023 |
| Address | Virginia City, MT 59755 |
| Receiving water | PROSPECT GULCH |
| Subwatershed | Upper Alder Gulch (HUC 100200030402) |
| SIC | 1041 – Gold Ores |
| Other EPA IDs (FRS) | RCRA handler MTR000008185 |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 15Pollutants on file
- 15Under a numeric limit
- 15With 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 | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| pH | 4 | 6 | 0 | ||
| Solids, total suspended | 2 | 3 | 0 | ||
| Hardness, total [as CaCO3] | 2 | 3 | 0 | ||
| Arsenic, total [as As] | 2 | 3 | 0 | ||
| Beryllium, total [as Be] | 2 | 3 | 0 | ||
| Cadmium, total [as Cd] | 2 | 3 | 0 | ||
| Copper, total [as Cu] | 2 | 3 | 0 | ||
| Iron, total [as Fe] | 2 | 3 | 0 | ||
| Lead, total [as Pb] | 2 | 3 | 0 | ||
| Nickel, total [as Ni] | 2 | 3 | 0 | ||
| Silver, total [as Ag] | 2 | 3 | 0 | ||
| Zinc, total [as Zn] | 2 | 3 | 0 | ||
| Antimony, total [as Sb] | 2 | 3 | 0 | ||
| Selenium, total [as Se] | 2 | 3 | 0 | ||
| Mercury, total [as Hg] | 2 | 3 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MTR000524.
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
- 10Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| July 1, 2025 | WW Storm Water Non-Construction - Failure to submit required report (non-DMR) | ST6 |
| July 1, 2025 | WW Storm Water Non-Construction - Failure to Implement SWPPP/SWMP | ST6 |
| July 1, 2025 | WW Storm Water Non-Construction - Failure to properly install/implement BMPs | ST6 |
| July 1, 2025 | WW Storm Water Non-Construction - CWA §308 Failure to submit required permit application info | ST6 |
| May 15, 2017 | WW Storm Water Non-Construction - Failure to develop any or adequate SWPPP/SWMP | ST6 |
| May 15, 2017 | WW Storm Water Non-Construction - Failure to Conduct Inspections | ST6 |
| May 15, 2017 | WW Storm Water Non-Construction - Failure to Monitor | ST6 |
| May 15, 2017 | WW Storm Water Non-Construction - Failure to Maintain Records | ST6 |
| May 15, 2017 | WW Storm Water MS4 - Failure to properly install/implement BMPs | ST6 |
| May 15, 2017 | WW Storm Water Non-Construction - Failure to properly operate and maintain BMPs | 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.
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, MTR000524.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
How we handle your data → Privacy
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 MTR000524 there.
Nearby on the register
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- Every permit record in Virginia City, A to Z
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- Every permit record in Montana, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.