Clean Water Act discharge permit · NPDES MTR000090
GRAYMONT WESTERN US INC, Townsend, MT: NPDES MTR000090 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 4Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
GRAYMONT WESTERN US INC holds NPDES permit MTR000090, which discharges to Canyon Ferry Lake. EPA’s file records it issued July 1, 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 | GRAYMONT WESTERN US INC |
|---|---|
| Permittee as filed | GRAYMONT WESTERN US INC |
| NPDES ID | MTR000090 |
| 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 | July 1, 2018 |
| Expiration date | January 31, 2023 |
| Address | Townsend, MT 59644 |
| Receiving water | CANYON FERRY LAKE |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Missouri River-Lower Crow Creek (HUC 100301010707) |
| SIC | 3274 – Lime |
| Other EPA IDs (FRS) | RCRA handler MTR000007963; ICIS-AIR source MT0000003000700002 |
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
- 10Pollutants on file
- 4Under a numeric limit
- 8With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 4 | 6 | 0 | ||
| Iron, total [as Fe] | 4 | 4 | 0 | ||
| Flow rate | 0 | 2 | 0 | ||
| Oxygen demand, chem. [low level] [COD] | 0 | 2 | 0 | ||
| pH | 0 | 2 | 0 | ||
| Nitrite + Nitrate total [as N] | 0 | 2 | 0 | ||
| Oil and grease visual | 0 | 2 | 0 | ||
| Report due [yrmoda] | 0 | 1 | 0 | ||
| Copper, total [as Cu] | 4 | 0 | 0 | ||
| Zinc, total [as Zn] | 4 | 0 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MTR000090.
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
- 4Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| August 3, 2023 | WW Storm Water Non-Construction - Failure to Maintain Records | ST6 |
| August 3, 2023 | WW Storm Water Non-Construction - Failure to properly operate and maintain BMPs | ST6 |
| August 3, 2023 | WW Storm Water Non-Construction - Failure to Conduct Inspections | ST6 |
| August 3, 2023 | WW Storm Water Non-Construction - Failure to properly install/implement 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, MTR000090.
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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 MTR000090 there.
Nearby on the register
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- Every permit record in Townsend, A to Z
- Discharge permits in Montana
- Every permit record in Montana, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.