Clean Water Act discharge permit · NPDES MTX000167
GRAND VALLEY ESTATES, Helena, MT: NPDES MTX000167 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 11Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
GRAND VALLEY ESTATES, held by TOM AND KIM HARRISON, holds NPDES permit MTX000167, which discharges to Class I Ground Water. EPA’s file records it issued October 24, 2012 and expiring November 30, 2017. 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 | GRAND VALLEY ESTATES |
|---|---|
| Permittee as filed | TOM AND KIM HARRISON |
| NPDES ID | MTX000167 |
| 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 24, 2012 |
| Expiration date | November 30, 2017 |
| Address | Helena, MT 59602 |
| Receiving water | CLASS I GROUND WATER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Last Chance Gulch (HUC 100301011309) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 18Pollutants on file
- 11Under a numeric limit
- 18With 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 | 90 | 40 | June 30, 2026 | 290% over the limit |
| Phosphorus, total [as P] | 5 | 69 | 0 | ||
| Nitrite + Nitrate total [as N] | 3 | 61 | 0 | ||
| Flow rate | 2 | 50 | 0 | ||
| Nitrogen, ammonia total [as N] | 2 | 47 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 2 | 31 | 0 | ||
| E. coli, MTEC-MF | 1 | 30 | 0 | ||
| Water level at sample collection time | 1 | 30 | 0 | ||
| Specific conductance | 0 | 29 | 0 | ||
| BOD, 5-day, 20 deg. C | 1 | 17 | 0 | ||
| Solids, total suspended | 1 | 17 | 0 | ||
| Temperature, water deg. centigrade | 0 | 16 | 0 | ||
| Nitrogen, total Kjeldahl | 0 | 16 | 0 | ||
| Monitoring well level from the surface | 0 | 14 | 0 | ||
| Count of samples collected in reporting period | 0 | 13 | 0 | ||
| pH | 0 | 8 | 0 | ||
| Chloride [as Cl] | 0 | 8 | 0 | ||
| Conductivity | 1 | 1 | 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
- 3Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| March 7, 2024 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| March 7, 2024 | WW Storm Water Non-Construction - Failure to Maintain Records | ST6 |
| March 7, 2024 | Monitoring Violations - Frequency of Sampling Violation | 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, MTX000167.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/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 MTX000167 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.