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Pearl River Navigation LLC

Ship Building And Repairing, Slidell, Louisiana. NPDES permit LA0109461, in force until Feb 28, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 89 days after each period: outfall 001 form A quarterly (12 values), outfall 02B form A quarterly (12 values), outfall 003 form S twice a year
Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 6 of 26 reports late

Limits in force (40)

ParameterStatisticLimitMonthsOutfall
pHinstantaneous minimum≥ 6 SUall year001
pHinstantaneous minimum≥ 6 SUall year001
pHinstantaneous maximum≤ 9 SUall year001
pHinstantaneous maximum≤ 9 SUall year001
Carbon, tot organic [TOC]daily maximum≤ 50 mg/Lall year001
Carbon, tot organic [TOC]daily maximum≤ 50 mg/Lall year001
Oil and greasedaily maximum≤ 15 mg/Lall year001
Oil and greasedaily maximum≤ 15 mg/Lall year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)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
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year003
BOD, 5-day, 20 deg. Cdaily maximum≤ 45 mg/Lall year003
pHinstantaneous minimum≥ 6 SUall year003
pHinstantaneous maximum≤ 9 SUall year003
Solids, total suspendedmonthly average≤ 30 mg/Lall year003
Solids, total suspendeddaily maximum≤ 45 mg/Lall year003
Nitrogen, total [as N]monthly averagereport only (mg/L)all year003
Nitrogen, total [as N]daily maximumreport only (mg/L)all year003
Phosphorus, total [as P]monthly averagereport only (mg/L)all year003
Phosphorus, total [as P]daily maximumreport only (mg/L)all 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
Enterococcimonthly geometric mean≤ 35 #/100mLall year003
Enterococcidaily maximum≤ 135 #/100mLall year003
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year003
Coliform, fecal generaldaily maximum≤ 400 #/100mLall year003
Oxygen demand, chem. [high level] [COD]daily maximum≤ 250 mg/Lall year02B
Oxygen demand, chem. [high level] [COD]daily maximum≤ 250 mg/Lall year02B
pHinstantaneous minimum≥ 6 SUall year02B
pHinstantaneous minimum≥ 6 SUall year02B
pHinstantaneous maximum≤ 9 SUall year02B
pHinstantaneous maximum≤ 9 SUall year02B
Oil & Greasedaily maximum≤ 15 mg/Lall year02B
Oil & Greasedaily maximum≤ 15 mg/Lall year02B
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year02B
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year02B
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year02B
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year02B

How strict are these limits?

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

Same industry: the 15 Transportation Equipment 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/LA0109461 · MCP: https://passage-data.com/mcp