Clean Water Act discharge permit · NPDES MTX000210
HERON CREEK SUBDIVISION, Helena, MT: NPDES MTX000210 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 8Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
HERON CREEK SUBDIVISION, held by SUSSEX DEVELOPMENT INC, holds NPDES permit MTX000210, which discharges to Ground Water. EPA’s file records it issued October 27, 2014 and expiring November 30, 2019. 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 | HERON CREEK SUBDIVISION |
|---|---|
| Permittee as filed | SUSSEX DEVELOPMENT INC |
| NPDES ID | MTX000210 |
| 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 | October 27, 2014 |
| Expiration date | November 30, 2019 |
| Address | Helena, MT 59602 |
| Receiving water | GROUND WATER |
| Subwatershed | Lower Spokane Creek (HUC 100301011603) |
| SIC | 1521 – Single-Family Housing Construction |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 13Pollutants on file
- 8Under a numeric limit
- 13With 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] | 4 | 11 | 5 | March 31, 2026 | 119% over the limit |
| Nitrogen, ammonia total [as N] | 2 | 18 | 0 | ||
| Nitrite + Nitrate total [as N] | 2 | 18 | 0 | ||
| Nitrogen, nitrate total [as N] | 0 | 18 | 0 | ||
| Chloride [as Cl] | 0 | 18 | 0 | ||
| Specific conductance | 0 | 16 | 0 | ||
| E. coli, MTEC-MF | 0 | 16 | 0 | ||
| Water level at sample collection time | 0 | 16 | 0 | ||
| Flow rate | 2 | 6 | 0 | ||
| Phosphorus, total [as P] | 3 | 4 | 0 | ||
| BOD, 5-day, 20 deg. C | 1 | 3 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 2 | 2 | 0 | ||
| Solids, total suspended | 1 | 2 | 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
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| August 28, 2024 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| August 28, 2024 | Reporting Violations - Improper/ Incorrect Reporting | 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, MTX000210.
Start the watch
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- One watershed — $2,990/year
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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 MTX000210 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.