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Calcasieu Parish Police Jury - Sewerage District #11 WWTP

Sewage treatment plant, Lake Charles, Louisiana. NPDES permit LA0074357, in force until Sep 30, 2031. Last 12 months: over a limit 8 times (last March 2026). Source: EPA ECHO, Oct 22, 2026.

Last report on file
August 2026
Oct 2024 – Sep 2025
20 values over a limit, 0 required values missing, 0 of 16 reports late

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

Period endingParameterReportedLimitOver by
October 2025Coliform, fecal general, weekly geometric mean460 #/100mL≤ 400 #/100mL15%
November 2025Oxygen, dissolved [DO], monthly average minimum1.8 mg/L≥ 2 mg/L10%
January 2026BOD, carbonaceous [5 day, 20 C], weekly average16.23 mg/L≤ 15 mg/L8%
January 2026Solids, total suspended, monthly average15.5 mg/L≤ 15 mg/L3%
February 2026BOD, carbonaceous [5 day, 20 C], monthly average13.18 mg/L≤ 10 mg/L32%
February 2026Solids, total suspended, monthly average48.5 mg/L≤ 15 mg/L223%
February 2026Solids, total suspended, weekly average61 mg/L≤ 23 mg/L165%
March 2026Solids, total suspended, monthly average16 mg/L≤ 15 mg/L7%

Limits in force (31)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly average minimum≥ 2 mg/Lall year
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 15 mg/Lall year
Solids, total suspendedweekly average≤ 23 mg/Lall year
Solids, total suspendedmonthly average≤ 38 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedweekly averagereport only (mg/L)all 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
Nitrogen, ammonia total [as N]monthly average≤ 10 mg/Lall year
Nitrogen, ammonia total [as N]weekly average≤ 14 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 25 lb/dall 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 plantweekly averagereport only (MGD)all year
Solids, total dissolvedmonthly averagereport only (mg/L)all year
Solids, total dissolvedweekly averagereport only (mg/L)all year
Solids, total dissolvedmonthly averagereport only (lb/d)all year
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year
Coliform, fecal generalweekly geometric mean≤ 400 #/100mLall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 15 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 lb/dall year
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year
BOD, carbonaceous [5 day, 20 C]weekly averagereport only (mg/L)all year
BOD, carbonaceous, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year

How strict are these limits?

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

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/LA0074357 · MCP: https://passage-data.com/mcp