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West Baton Rouge Parish

Sewage treatment plant, Port Allen, Louisiana. NPDES permit LA0068501, in force until Jul 31, 2029. Last 12 months: over a limit 12 times (last May 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A quarterly (26 values), form Q quarterly (6 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 8 of 16 reports late

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

Period endingParameterReportedLimitOver by
October 2025Solids, total suspended, monthly average15.8 mg/L≤ 15 mg/L5%
November 2025Coliform, fecal general, monthly geometric mean> 2410 MPN/100mL≤ 200 #/100mL—
November 2025Coliform, fecal general, weekly geometric mean> 2410 MPN/100mL≤ 400 #/100mL—
March 2026BOD, 5-day, 20 deg. C, monthly average20 mg/L≤ 10 mg/L100%
March 2026BOD, 5-day, 20 deg. C, weekly average27 mg/L≤ 15 mg/L80%
March 2026Coliform, fecal general, monthly geometric mean< 400 MPN/100mL≤ 200 #/100mL100%
March 2026Solids, total suspended, monthly average23.4 mg/L≤ 15 mg/L56%
March 2026Solids, total suspended, weekly average31 mg/L≤ 23 mg/L35%
April 2026Coliform, fecal general, monthly geometric mean< 400 MPN/100mL≤ 200 #/100mL100%
May 2026BOD, 5-day, 20 deg. C, monthly average17 mg/L≤ 10 mg/L70%
May 2026BOD, 5-day, 20 deg. C, weekly average28 mg/L≤ 15 mg/L87%
May 2026Coliform, fecal general, monthly geometric mean< 400 MPN/100mL≤ 200 #/100mL100%

Limits in force (32)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 15 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 15 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 33 lb/dall year
BOD, 5-day, 20 deg. Cmonthly average≤ 33 lb/dall year
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous maximum≤ 9 SUall year
pHinstantaneous maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 15 mg/Lall year
Solids, total suspendedmonthly average≤ 15 mg/Lall year
Solids, total suspendedweekly average≤ 23 mg/Lall year
Solids, total suspendedweekly average≤ 23 mg/Lall year
Solids, total suspendedmonthly average≤ 50 lb/dall year
Solids, total suspendedmonthly average≤ 50 lb/dall year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]weekly averagereport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (lb/d)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]weekly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (lb/d)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year
Chlorine, total residualinstantaneous maximumreport only (mg/L)all year
Chlorine, total residualinstantaneous maximumreport only (mg/L)all year
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year
Coliform, fecal generalweekly geometric mean≤ 400 #/100mLall year
Coliform, fecal generalweekly geometric mean≤ 400 #/100mLall year

New limits from Aug 1, 2027

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Chlorine, total residual, instantaneous maximum0.3 mg/Lnew1.62 mg/L (9 values)5.4×

How strict are these limits?

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/LA0068501 · MCP: https://passage-data.com/mcp