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Entergy Louisiana LLC - Little Gypsy Generating Plant/J Wayne Leonard Power Stat

Electric Services, major discharger, Montz, Louisiana. NPDES permit LA0003191, in force until Sep 30, 2031. Last 12 months: over a limit once (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 151 reports late

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

Period endingParameterReportedLimitOver by
June 2026Oil & Grease, daily maximum33 mg/L≤ 20 mg/L65%

Limits in force (103)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitmonthly average≤ 112.7 deg Fall year001
Temperature, water deg. fahrenheitdaily maximum≤ 116 deg Fall 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
Chlorine, total residualdaily maximum≤ .2 mg/Lall year001
Chlorine, total residualdaily maximum≤ 130 lb/dall 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
pHinstantaneous minimum≥ 6 SUall year002
pHinstantaneous maximum≤ 9 SUall year002
Solids, total suspendedmonthly average≤ 30 mg/Lall year002
Solids, total suspendeddaily maximum≤ 100 mg/Lall year002
Oil & Greasedaily maximum≤ 15 mg/Lall year002
Carbon, tot organic [TOC]daily maximum≤ 50 mg/Lall year002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
pHinstantaneous minimum≥ 6.5 SUall year003
pHinstantaneous maximum≤ 9 SUall year003
Oil & Greasedaily maximum≤ 15 mg/Lall year003
Carbon, tot organic [TOC]daily maximum≤ 50 mg/Lall year003
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year003
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year003
pHinstantaneous minimum≥ 6 SUall year007
pHinstantaneous maximum≤ 9 SUall year007
Solids, total suspendeddaily maximum≤ 90 mg/Lall year007
Solids, total suspendeddaily maximum≤ 90 mg/Lall year007
Oil & Greasedaily maximum≤ 15 mg/Lall year007
Carbon, tot organic [TOC]daily maximum≤ 50 mg/Lall year007
Lead, total [as Pb]daily maximum≤ 50 ug/Lall year007
Benzenedaily maximum≤ 50 ug/Lall year007
BTEXdaily maximum≤ 250 ug/Lall year007
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year007
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year007
pHinstantaneous minimum≥ 6 SUall year008
pHinstantaneous maximum≤ 9 SUall year008
Chromium, total [as Cr]monthly average≤ .2 mg/Lall year008
Chromium, total [as Cr]daily maximum≤ .2 mg/Lall year008
Zinc, total [as Zn]monthly average≤ 1 mg/Lall year008
Zinc, total [as Zn]daily maximum≤ 1 mg/Lall year008
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year008
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year008
Chlorine, free availablemonthly average≤ .2 mg/Lall year008
Chlorine, free availabledaily maximum≤ .5 mg/Lall year008
pHinstantaneous minimum≥ 6 SUall year009
pHinstantaneous maximum≤ 9 SUall year009
Solids, total suspendedmonthly average≤ 30 mg/Lall year009
Solids, total suspendeddaily maximum≤ 100 mg/Lall year009
Oil & Greasemonthly average≤ 15 mg/Lall year009
Oil & Greasedaily maximum≤ 20 mg/Lall year009
Carbon, tot organic [TOC]daily maximum≤ 50 mg/Lall year009
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year009
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year009
Solids, total suspendedmonthly average≤ 30 mg/Lall year108
Solids, total suspendeddaily maximum≤ 100 mg/Lall year108
Oil & Greasemonthly average≤ 15 mg/Lall year108
Oil & Greasedaily maximum≤ 20 mg/Lall year108
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year108
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year108
Solids, total suspendedmonthly average≤ 30 mg/Lall year208
Solids, total suspendeddaily maximum≤ 100 mg/Lall year208
Oil & Greasemonthly average≤ 15 mg/Lall year208
Oil & Greasedaily maximum≤ 20 mg/Lall year208
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year208
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year208
pHinstantaneous minimum≥ 6 SUall year211
pHinstantaneous maximum≤ 9 SUall year211
Solids, total suspendedmonthly average≤ 30 mg/Lall year211
Solids, total suspendeddaily maximum≤ 100 mg/Lall year211
Oil & Greasemonthly average≤ 15 mg/Lall year211
Oil & Greasedaily maximum≤ 20 mg/Lall year211
Carbon, tot organic [TOC]daily maximum≤ 50 mg/Lall year211
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year211
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year211
Oil & Greasemonthly average≤ 15 mg/Lall year221
Oil & Greasedaily maximum≤ 20 mg/Lall year221
Carbon, tot organic [TOC]daily maximum≤ 50 mg/Lall year221
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year221
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year221
pHinstantaneous minimum≥ 6 SUall year301
pHinstantaneous maximum≤ 9 SUall year301
Solids, total suspendedmonthly average≤ 30 mg/Lall year301
Solids, total suspendeddaily maximum≤ 100 mg/Lall year301
Oil & Greasemonthly average≤ 15 mg/Lall year301
Oil & Greasedaily maximum≤ 20 mg/Lall year301
Carbon, tot organic [TOC]daily maximum≤ 50 mg/Lall year301
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year301
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year301
Oxygen demand, chem. [high level] [COD]monthly average≤ 200 mg/Lall year311
Oxygen demand, chem. [high level] [COD]daily maximum≤ 300 mg/Lall year311
Copper, total [as Cu]monthly average≤ 1 mg/Lall year311
Copper, total [as Cu]daily maximum≤ 1 mg/Lall year311
Iron, total [as Fe]monthly average≤ 1 mg/Lall year311
Iron, total [as Fe]daily maximum≤ 1 mg/Lall year311
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year311
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year311

How strict are these limits?

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

Same industry: the 29 Electric Services 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/LA0003191 · MCP: https://passage-data.com/mcp