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Clean Water Act discharge permit · NPDES WIG006815

AIR LIQUIDE ADVANCED TECHNOLOGIES US LLC, Darien, WI: NPDES WIG006815 discharge permit, effluent exceedances, inspections, penalties

AIR LIQUIDE ADVANCED TECHNOLOGIES US LLC, held by Air Liquide Advanced Technologies US LLC, holds NPDES permit WIG006815. EPA’s file records it issued October 1, 2021 and expiring September 30, 2026.

AIR LIQUIDE ADVANCED TECHNOLOGIES US LLC, Darien, Wisconsin: Coverage under a general permit WIG006815, held by Air Liquide Advanced Technologies US LLC; Effective; issued October 1, 2021, term to September 30, 2026.

Other permits held by Air Liquide Advanced Technologies US LLC

AIR LIQUIDE ADVANCED TECHNOLOGIES US LLC among its neighbors

EPA’s permit file holds 3 discharge permits in the Trout Lake-Turtle Creek subwatershed (HUC 070900021406), WIG006815 among them. Its county holds 115, 3 of them major permits; WIG006815 is a minor permit.

Other permits in the Trout Lake-Turtle Creek subwatershed (HUC 070900021406)

What the register holds for AIR LIQUIDE ADVANCED TECHNOLOGIES US LLC: its NPDES ID, its permit type and status, its dates, its address in Darien, Wisconsin. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES WIG006815.

Identity

Facility as filedAIR LIQUIDE ADVANCED TECHNOLOGIES US LLC
Permittee as filedAir Liquide Advanced Technologies US LLC
NPDES IDWIG006815
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedOctober 1, 2021
Expiration dateSeptember 30, 2026
AddressDarien, WI 15146
SubwatershedTrout Lake-Turtle Creek (HUC 070900021406)

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES WIG006815.

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES WIG006815.

Inspections

EPA’s inspection file holds no inspection for NPDES WIG006815.

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES WIG006815.

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, WIG006815.

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Nearby on the register

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

What this page shows

The Trout Lake-Turtle Creek subwatershed holds 3 NPDES permits, with AIR LIQUIDE ADVANCED TECHNOLOGIES US LLC included. Walworth County has 95 general permit coverages on EPA's NPDES register, and 2.1% of them carry a violation on file.