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 (October 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)
SIC	2813 – Industrial Gases
Other EPA IDs (FRS)	RCRA handler MT0000980904; ICIS-AIR source 080000003004900904

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.

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.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

This public-records page covers Clean Water Act discharge permit NPDES MT0000426, held by AIR LIQUIDE INDUSTRIAL US LP in East Helena, MT, which discharges to Prickly Pear Creek in watershed HUC 100301011310. The permit is administratively continued, with 1 pollutant under a numeric limit and 1 pollutant with an effluent exceedance.