Clean Water Act discharge permit · NPDES MTX000208
ONE HORSE ESTATES, Florence, MT: NPDES MTX000208 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 14Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
ONE HORSE ESTATES, held by ONE HORSE HOMEOWNERS ASSOCIATION INC, holds NPDES permit MTX000208, which discharges to Ground Water. EPA’s file records it issued March 10, 2009 and expiring April 30, 2014. 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 | ONE HORSE ESTATES |
|---|---|
| Permittee as filed | ONE HORSE HOMEOWNERS ASSOCIATION INC |
| NPDES ID | MTX000208 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | State-issued individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | March 10, 2009 |
| Expiration date | April 30, 2014 |
| Address | Florence, MT 59833 |
| Receiving water | GROUND WATER |
| Subwatershed | Sin-tin-tin-em-ska Creek (HUC 170102051507) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 14Pollutants on file
- 14Under a numeric limit
- 14With 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 |
|---|---|---|---|---|---|
| Nitrogen, total [as N] | 3 | 51 | 13 | June 30, 2026 | 134% over the limit |
| Phosphorus, total [as P] | 3 | 37 | 0 | ||
| Flow rate | 2 | 30 | 0 | ||
| Specific conductance | 2 | 23 | 0 | ||
| Nitrogen, ammonia total [as N] | 2 | 21 | 0 | ||
| Nitrite + Nitrate total [as N] | 2 | 21 | 0 | ||
| E. coli, MTEC-MF | 2 | 21 | 0 | ||
| BOD, 5-day, 20 deg. C | 1 | 15 | 0 | ||
| pH | 1 | 15 | 0 | ||
| Solids, total suspended | 1 | 15 | 0 | ||
| Oil and grease, hexane extr method | 1 | 15 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 15 | 0 | ||
| Chloride [as Cl] | 1 | 6 | 0 | ||
| Water level at sample collection time | 1 | 6 | 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
- 4Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| December 19, 2023 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| December 19, 2023 | Monitoring Violations - Analysis not Conducted | ST6 |
| December 19, 2023 | Monitoring Violations - Frequency of Sampling Violation | ST6 |
| December 19, 2023 | Monitoring Violations - Invalid/Unrepresentative Sample | 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, MTX000208.
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 MTX000208 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.