Clean Water Act discharge permit · NPDES MT0000426
AIR LIQUIDE INDUSTRIAL US LP, East Helena, MT: NPDES MT0000426 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 5Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
AIR LIQUIDE INDUSTRIAL US LP holds NPDES permit MT0000426, which discharges to Prickly Pear Creek. EPA’s file records it issued December 24, 2003 and expiring January 31, 2009. 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 | AIR LIQUIDE INDUSTRIAL US LP |
|---|---|
| Permittee as filed | AIR LIQUIDE INDUSTRIAL US LP |
| NPDES ID | MT0000426 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | December 24, 2003 |
| Expiration date | January 31, 2009 |
| Issuing agency | MONTANA DEQ |
| Address | East Helena, MT 59635 |
| Receiving water | PRICKLY PEAR CREEK |
| Subwatershed | Lower Prickley Pear Gulch (HUC 100301011310) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 8Pollutants on file
- 5Under a numeric limit
- 6With 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 |
|---|---|---|---|---|---|
| Temperature, water deg. fahrenheit | 2 | 10 | 1 | June 30, 2007 | 0% over the limit |
| pH | 2 | 6 | 0 | ||
| Flow rate | 1 | 6 | 0 | ||
| Oil and grease, hexane extr method | 0 | 6 | 0 | ||
| Chlorine, total residual | 0 | 3 | 0 | ||
| Total production - mass | 0 | 1 | 0 | ||
| Thermal Discharge | 2 | 0 | 0 | ||
| Oil and grease visual | 1 | 0 | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES MT0000426.
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
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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 MT0000426 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.