Clean Water Act discharge permit · NPDES MTX000289
BIG SKY WATERPARK, Columbia Falls, MT: NPDES MTX000289 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 11Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
BIG SKY WATERPARK, held by Marlo's Liquid Assets Company LLC, holds NPDES permit MTX000289, which discharges to Ground Water. EPA’s file records it issued August 25, 2023 and expiring September 30, 2028. 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.
Identity
| Facility as filed | BIG SKY WATERPARK |
|---|---|
| Permittee as filed | Marlo's Liquid Assets Company LLC |
| NPDES ID | MTX000289 |
| Permit status | Effective |
| Permit type | State-issued individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | August 25, 2023 |
| Expiration date | September 30, 2028 |
| Address | Columbia Falls, MT 59912 |
| Receiving water | GROUND WATER |
| Subwatershed | Flathead River-Goodwich Bayou (HUC 170102080103) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 11Pollutants on file
- 11Under a numeric limit
- 11With 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] | 4 | 44 | 0 | ||
| Nitrogen, ammonia total [as N] | 3 | 33 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 3 | 33 | 0 | ||
| Nitrite + Nitrate total [as N] | 3 | 33 | 0 | ||
| Temperature, water deg. centigrade | 2 | 22 | 0 | ||
| Flow rate | 2 | 22 | 0 | ||
| Depth, max of sample | 2 | 22 | 0 | ||
| Specific conductance | 2 | 22 | 0 | ||
| Chloride [as Cl] | 2 | 22 | 0 | ||
| Monitoring well level from the surface | 2 | 22 | 0 | ||
| Phosphorus, total [as P] | 1 | 11 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MTX000289.
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 MTX000289.
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, MTX000289.
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 MTX000289 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 14, 2026.