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Clean Water Act discharge permit · NPDES AL0000345

AMERICAN CARBONYL LLC, Huntsville, AL: NPDES AL0000345 discharge permit, effluent exceedances, inspections, penalties

AMERICAN CARBONYL LLC, held by Isp Chemicals LLC, holds NPDES permit AL0000345. EPA’s file records it issued December 20, 2021 and expiring December 31, 2026. 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 filedAMERICAN CARBONYL LLC
Permittee as filedIsp Chemicals LLC
NPDES IDAL0000345
Permit statusEffective
Permit typeIndividual permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedDecember 20, 2021
Expiration dateDecember 31, 2026
Issuing agencyState
AddressHuntsville, AL 35898
SubwatershedUpper Brier Fork (HUC 060300020304)
Other EPA IDs (FRS)RCRA handler AL7210020742

Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.

Effluent limits and exceedances

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 measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Flow, in conduit or thru treatment plant3360
pH6280
Temperature, water deg. fahrenheit1280
Chlorine, total residual0280
Nitrogen, total [as N]2160
Iron, total recoverable2140
Carbon, tot organic [TOC]2100
Solids, total suspended280
Chemical Oxygen Demand [COD]280
Oil and grease040
Oil & Grease220

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES AL0000345.

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

EPA’s single-event violation file, as loaded, holds no violation for NPDES AL0000345.

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.

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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 AL0000345 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

What this page shows

This public-records page covers Clean Water Act discharge permit NPDES AL0000345 for AMERICAN CARBONYL LLC in Huntsville, AL, held by Isp Chemicals LLC, with a status of Effective and an individual permit type. The facts list 11 pollutants on file, 9 under a numeric limit, 11 with a violation of any kind, and 0 with an effluent exceedance.