Clean Water Act discharge permit · NPDES MTX000330
MDT GREYCLIFF REST AREA, Greycliff, MT: NPDES MTX000330 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 14Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
MDT GREYCLIFF REST AREA, held by Montana Department of Transportation, holds NPDES permit MTX000330, which discharges to Ground Water. EPA’s file records it issued February 4, 2025 and expiring February 28, 2030. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
What the register holds for MDT GREYCLIFF REST AREA: its NPDES ID, its permit type and status, its dates, its address in Greycliff, Montana, its receiving water, and 14 pollutants under a numeric limit. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MTX000330.
Identity
| Facility as filed | MDT GREYCLIFF REST AREA |
|---|---|
| Permittee as filed | Montana Department of Transportation |
| NPDES ID | MTX000330 |
| Permit status | Effective |
| Permit type | State-issued individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | February 4, 2025 |
| Expiration date | February 28, 2030 |
| Address | Greycliff, MT 59033 |
| Receiving water | GROUND WATER |
| Subwatershed | Yellowstone River-Hangman's Creek (HUC 100700021409) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 14Pollutants on file
- 14Under a numeric limit
- 0With 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 |
|---|---|---|---|---|---|
| Nitrogen, total [as N] | 10 | 0 | 0 | ||
| Nitrogen, ammonia total [as N] | 6 | 0 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 6 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 6 | 0 | 0 | ||
| BOD, 5-day, 20 deg. C | 4 | 0 | 0 | ||
| Phosphorus, total [as P] | 4 | 0 | 0 | ||
| Flow rate | 3 | 0 | 0 | ||
| Solids, total suspended | 3 | 0 | 0 | ||
| Temperature, water deg. centigrade | 2 | 0 | 0 | ||
| Specific conductance | 2 | 0 | 0 | ||
| Chloride [as Cl] | 2 | 0 | 0 | ||
| Water level at sample collection time | 2 | 0 | 0 | ||
| Monitoring well level from the surface | 2 | 0 | 0 | ||
| Nitrogen, total, percent removal [%] | 1 | 0 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MTX000330.
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 MTX000330.
Velarion’s copy of EPA’s ICIS-NPDES files does not yet 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, MTX000330.
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 MTX000330 there.
Nearby on the register
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- Every permit record in Greycliff, A to Z
- Discharge permits in Montana
- Every permit record in Montana, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.