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Denka Performance Elastomer LLC - Pontchartrain Plant

Synthetic Rubber, major discharger, Laplace, Louisiana. NPDES permit LA0127190, in force until Jun 30, 2031. Last 12 months: over a limit once (last February 2026), 1 required value missing, 2 of 42 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (7 values), outfall 101A form A monthly (17 values), outfall 101B form A monthly (17 values), outfall 001 form DA quarterly, outfall 001 form PI quarterly, outfall 001 form Q quarterly, and 2 more forms
Last report on file
August 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 3 of 48 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
February 2026Coliform, fecal general, monthly geometric mean387 #/100mL≤ 200 #/100mL94%

Limits in force (75)

ParameterStatisticLimitMonthsOutfall
pHinstantaneous minimumreport only (SU)all year001
pHinstantaneous maximumreport only (SU)all year001
Carbon, tot organic [TOC]daily maximum≤ 50 mg/Lall year001
Aluminum, total [as Al]monthly averagereport only (ug/L)all year001
Aluminum, total [as Al]daily maximumreport only (ug/L)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
pH range excursions, > 60 minutesdaily maximum≤ 0 occur/moall year001
pH range excursions, monthly total accummonthly total≤ 446 minall year001
Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex48-hour minimumreport only (pass=0;fail=1)all year001
Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulexmonthly average minimumreport only (pass=0;fail=1)all year001
LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas48-hour minimumreport only (pass=0;fail=1)all year001
LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelasmonthly average minimumreport only (pass=0;fail=1)all year001
NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex48-hour minimumreport only (%)all year001
NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulexmonthly average minimumreport only (%)all year001
NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas48-hour minimumreport only (%)all year001
NOAEC Lethal Static Renewal 48Hr acute Pimephales promelasmonthly average minimumreport only (%)all year001
Coef Of Var Static Renewal 48Hr Acute D. pulexmaximumreport only (%)all year001
Coef Of Var Static Renewal 48Hr Acute Pimephales promelasmaximumreport only (%)all year001
Total production - massmonthly averagereport only (lb/d)all year101A
BOD, 5-day, 20 deg. Cmonthly average≤ 139 lb/dall year101A
BOD, 5-day, 20 deg. Cdaily maximum≤ 208 lb/dall year101A
Oxygen demand, chem. [high level] [COD]monthly average≤ 818 lb/dall year101A
Oxygen demand, chem. [high level] [COD]daily maximum≤ 1227 lb/dall year101A
pHinstantaneous minimum≥ 6 SUall year101A
pHinstantaneous maximum≤ 9 SUall year101A
Solids, total suspendedmonthly average≤ 213 lb/dall year101A
Solids, total suspendeddaily maximum≤ 321 lb/dall year101A
Oil & Greasemonthly average≤ 48 lb/dall year101A
Oil & Greasedaily maximum≤ 71 lb/dall year101A
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year101A
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year101A
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year101A
Coliform, fecal generaldaily maximum≤ 400 #/100mLall year101A
Chloroprenemonthly average≤ 1.48 lb/dall year101A
Chloroprenedaily maximum≤ 5.94 lb/dall year101A
Total production - massmonthly averagereport only (lb/d)all year101B
BOD, 5-day, 20 deg. Cmonthly average≤ 156 lb/dall year101B
BOD, 5-day, 20 deg. Cdaily maximum≤ 234 lb/dall year101B
Oxygen demand, chem. [high level] [COD]monthly average≤ 907 lb/dall year101B
Oxygen demand, chem. [high level] [COD]daily maximum≤ 1361 lb/dall year101B
pHinstantaneous minimum≥ 6 SUall year101B
pHinstantaneous maximum≤ 9 SUall year101B
Solids, total suspendedmonthly average≤ 241 lb/dall year101B
Solids, total suspendeddaily maximum≤ 363 lb/dall year101B
Oil & Greasemonthly average≤ 54 lb/dall year101B
Oil & Greasedaily maximum≤ 82 lb/dall year101B
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year101B
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year101B
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year101B
Coliform, fecal generaldaily maximum≤ 400 #/100mLall year101B
Chloroprenemonthly average≤ 1.48 lb/dall year101B
Chloroprenedaily maximum≤ 5.94 lb/dall year101B
pHinstantaneous minimumreport only (SU)all year102A
pHinstantaneous maximumreport only (SU)all year102A
Solids, total suspendeddaily maximumreport only (mg/L)all year102A
Solids, total suspendeddaily maximumreport only (mg/L)all year102A
Oil & Greasedaily maximumreport only (mg/L)all year102A
Carbon, tot organic [TOC]daily maximumreport only (mg/L)all year102A
Lead, total [as Pb]daily maximumreport only (ug/L)all year102A
Benzenedaily maximumreport only (ug/L)all year102A
BTEXdaily maximumreport only (ug/L)all year102A
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year102A
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year102A
pHinstantaneous minimumreport only (SU)all year102B
pHinstantaneous maximumreport only (SU)all year102B
Solids, total suspendeddaily maximumreport only (mg/L)all year102B
Solids, total suspendeddaily maximumreport only (mg/L)all year102B
Oil & Greasedaily maximumreport only (mg/L)all year102B
Carbon, tot organic [TOC]daily maximumreport only (mg/L)all year102B
Lead, total [as Pb]daily maximumreport only (ug/L)all year102B
Benzenedaily maximumreport only (ug/L)all year102B
BTEXdaily maximumreport only (ug/L)all year102B
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year102B
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year102B

Cited limits by parameter: Louisiana's rules and the federal ones.

Same industry: the 130 Chemicals and Allied Products permits in Louisiana.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/LA0127190 · MCP: https://passage-data.com/mcp