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Entergy New Orleans LLC - Michoud Electric Generating Plant - New Orleans Power

Electric Services, New Orleans, Louisiana. NPDES permit LA0004324 expired Aug 10, 2025; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (7 values), outfall 002 form A monthly (9 values), outfall 101 form A monthly (6 values), outfall 107 form Q quarterly (9 values), outfall 201 form A monthly (6 values), outfall 202 form A monthly (6 values), and 2 more forms
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 66 reports late

Limits in force (65)

ParameterStatisticLimitMonthsOutfall
pHinstantaneous minimum≥ 6 SUall year001
pHinstantaneous maximum≤ 9 SUall year001
Oil & Greasemonthly average≤ 15 mg/Lall year001
Oil & Greasedaily maximum≤ 20 mg/Lall year001
Carbon, tot organic [TOC]daily maximum≤ 50 mg/Lall year001
Whole effluent toxicity - retest #148-hour minimumreport only (pass=0;fail=1)all year001
Whole effluent toxicity - retest #148-hour minimumreport only (pass=0;fail=1)all year001
Whole effluent toxicity - retest #1monthly average minimumreport only (pass=0;fail=1)all year001
Whole effluent toxicity - retest #1monthly average minimumreport only (pass=0;fail=1)all year001
Whole effluent toxicity - retest #248-hour minimumreport only (pass=0;fail=1)all year001
Whole effluent toxicity - retest #248-hour minimumreport only (pass=0;fail=1)all year001
Whole effluent toxicity - retest #2monthly average minimumreport only (pass=0;fail=1)all year001
Whole effluent toxicity - retest #2monthly average minimumreport only (pass=0;fail=1)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
Whole Effluent Toxicity - Retest #348-hour minimumreport only (pass=0;fail=1)all year001
Whole Effluent Toxicity - Retest #348-hour minimumreport only (pass=0;fail=1)all year001
Whole Effluent Toxicity - Retest #3monthly average minimumreport only (pass=0;fail=1)all year001
Whole Effluent Toxicity - Retest #3monthly average minimumreport only (pass=0;fail=1)all year001
LF Pass/Fail Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopis bahia)48-hour minimumreport only (pass=0;fail=1)all year001
LF Pass/Fail Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopis bahia)monthly average minimumreport only (pass=0;fail=1)all year001
Low Flow Pass/Fail Static Renewal 48Hr Acute Menidia beryllina48-hour minimumreport only (pass=0;fail=1)all year001
Low Flow Pass/Fail Static Renewal 48Hr Acute Menidia beryllinamonthly average minimumreport only (pass=0;fail=1)all year001
NOAEC Lethal Static Renewal 48HR Acute Americamysis bahia (formerly Mysidopsis bahia)48-hour minimumreport only (%)all year001
NOAEC Lethal Static Renewal 48HR Acute Americamysis bahia (formerly Mysidopsis bahia)monthly average minimumreport only (%)all year001
NOAEC Lethal Static Renewal 48HR Acute Menidia beryllina48-hour minimumreport only (%)all year001
NOAEC Lethal Static Renewal 48HR Acute Menidia beryllinamonthly average minimumreport only (%)all year001
Coef Of Var Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)maximumreport only (%)all year001
Coef Of Var Static Renewal 48Hr Acute Menidia beryllinamaximumreport 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 & Greasemonthly average≤ 15 mg/Lall year002
Oil & Greasedaily maximum≤ 20 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 SUall year101
pHinstantaneous maximum≤ 9 SUall year101
Solids, total suspendedmonthly average≤ 30 mg/Lall year101
Solids, total suspendeddaily maximum≤ 100 mg/Lall year101
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year101
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year101
Solids, total suspendeddaily maximum≤ 90 mg/Lall year107
Solids, total suspendeddaily maximum≤ 90 mg/Lall year107
Oil & Greasedaily maximum≤ 15 mg/Lall year107
Carbon, tot organic [TOC]daily maximum≤ 50 mg/Lall year107
Lead, total [as Pb]daily maximum≤ 50 ug/Lall year107
Benzenedaily maximum≤ 50 ug/Lall year107
BTEXdaily maximum≤ 250 ug/Lall year107
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year107
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year107
Copper, total [as Cu]monthly average≤ 1 mg/Lall year201
Copper, total [as Cu]daily maximum≤ 1 mg/Lall year201
Iron, total [as Fe]monthly average≤ 1 mg/Lall year201
Iron, total [as Fe]daily maximum≤ 1 mg/Lall year201
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year201
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year201
pHinstantaneous minimum≥ 6 SUall year202
pHinstantaneous maximum≤ 9 SUall year202
Solids, total suspendedmonthly average≤ 30 mg/Lall year202
Solids, total suspendeddaily maximum≤ 100 mg/Lall year202
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year202
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year202

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/LA0004324 · MCP: https://passage-data.com/mcp