Denka Performance Elastomer LLC - Pontchartrain Plant

NPDES permit LA0127190 · Major NON-POTW · effective, expires 2031-06-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

EPA's record, 2025-09-01 to 2026-08-31

1values over a limit
1required values missing, on 1 form(s)
2of 45 forms filed late

Last period with anything received: 2026-07-31. Most often over: Coliform, fecal general (1).

Reporting

Reports are due about 15 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (75)

OutfallParameterStatisticLimitMonths
001pHINST MIN report only all year
001pHINST MAX report only all year
001Carbon, tot organic [TOC]DAILY MX <= 50 mg/L all year
001Aluminum, total [as Al]MO AVG report only all year
001Aluminum, total [as Al]DAILY MX report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001pH range excursions, > 60 minutesDAILY MX <= 0 occur/mo all year
001pH range excursions, monthly total accumMO TOTAL <= 446 min all year
001Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex48HR MIN report only all year
001Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulexMO AV MN report only all year
001LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas48HR MIN report only all year
001LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelasMO AV MN report only all year
001NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex48HR MIN report only all year
001NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulexMO AV MN report only all year
001NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas48HR MIN report only all year
001NOAEC Lethal Static Renewal 48Hr acute Pimephales promelasMO AV MN report only all year
001Coef Of Var Static Renewal 48Hr Acute D. pulexMAXIMUM report only all year
001Coef Of Var Static Renewal 48Hr Acute Pimephales promelasMAXIMUM report only all year
101ATotal production - massMO AVG report only all year
101ABOD, 5-day, 20 deg. CMO AVG <= 139 lb/d all year
101ABOD, 5-day, 20 deg. CDAILY MX <= 208 lb/d all year
101AOxygen demand, chem. [high level] [COD]MO AVG <= 818 lb/d all year
101AOxygen demand, chem. [high level] [COD]DAILY MX <= 1227 lb/d all year
101ApHINST MIN >= 6 SU all year
101ApHINST MAX <= 9 SU all year
101ASolids, total suspendedMO AVG <= 213 lb/d all year
101ASolids, total suspendedDAILY MX <= 321 lb/d all year
101AOil & GreaseMO AVG <= 48 lb/d all year
101AOil & GreaseDAILY MX <= 71 lb/d all year
101AFlow, in conduit or thru treatment plantMO AVG report only all year
101AFlow, in conduit or thru treatment plantDAILY MX report only all year
101AColiform, fecal generalMOAV GEO <= 200 #/100mL all year
101AColiform, fecal generalDAILY MX <= 400 #/100mL all year
101AChloropreneMO AVG <= 1.48 lb/d all year
101AChloropreneDAILY MX <= 5.94 lb/d all year
101BTotal production - massMO AVG report only all year
101BBOD, 5-day, 20 deg. CMO AVG <= 156 lb/d all year
101BBOD, 5-day, 20 deg. CDAILY MX <= 234 lb/d all year
101BOxygen demand, chem. [high level] [COD]MO AVG <= 907 lb/d all year
101BOxygen demand, chem. [high level] [COD]DAILY MX <= 1361 lb/d all year
101BpHINST MIN >= 6 SU all year
101BpHINST MAX <= 9 SU all year
101BSolids, total suspendedMO AVG <= 241 lb/d all year
101BSolids, total suspendedDAILY MX <= 363 lb/d all year
101BOil & GreaseMO AVG <= 54 lb/d all year
101BOil & GreaseDAILY MX <= 82 lb/d all year
101BFlow, in conduit or thru treatment plantMO AVG report only all year
101BFlow, in conduit or thru treatment plantDAILY MX report only all year
101BColiform, fecal generalMOAV GEO <= 200 #/100mL all year
101BColiform, fecal generalDAILY MX <= 400 #/100mL all year
101BChloropreneMO AVG <= 1.48 lb/d all year
101BChloropreneDAILY MX <= 5.94 lb/d all year
102ApHINST MIN report only all year
102ApHINST MAX report only all year
102ASolids, total suspendedDAILY MX report only all year
102ASolids, total suspendedDAILY MX report only all year
102AOil & GreaseDAILY MX report only all year
102ACarbon, tot organic [TOC]DAILY MX report only all year
102ALead, total [as Pb]DAILY MX report only all year
102ABenzeneDAILY MX report only all year
102ABTEXDAILY MX report only all year
102AFlow, in conduit or thru treatment plantMO AVG report only all year
102AFlow, in conduit or thru treatment plantDAILY MX report only all year
102BpHINST MIN report only all year
102BpHINST MAX report only all year
102BSolids, total suspendedDAILY MX report only all year
102BSolids, total suspendedDAILY MX report only all year
102BOil & GreaseDAILY MX report only all year
102BCarbon, tot organic [TOC]DAILY MX report only all year
102BLead, total [as Pb]DAILY MX report only all year
102BBenzeneDAILY MX report only all year
102BBTEXDAILY MX report only all year
102BFlow, in conduit or thru treatment plantMO AVG report only all year
102BFlow, in conduit or thru treatment plantDAILY MX report only all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states