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Cottonport Town of - WWTP

Sewage treatment plant, Cottonport, Louisiana. NPDES permit LA0040126, in force until Jan 31, 2031. Last 12 months: over a limit 8 times (last August 2026), 3 of 14 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A quarterly, form Q quarterly, form Y yearly
Last report on file
August 2026
Oct 2024 – Sep 2025
6 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
December 2025Oxygen, dissolved [DO], monthly average minimum4.37 mg/L≥ 5 mg/L13%
April 2026Oxygen, dissolved [DO], monthly average minimum4.99 mg/L≥ 5 mg/L0%
May 2026Nitrogen, ammonia total [as N], monthly average2.07 mg/L≤ 2 mg/L4%
May 2026Solids, total suspended, monthly average18.07 mg/L≤ 15 mg/L20%
July 2026Nitrogen, ammonia total [as N], monthly average14.31 lb/d≤ 4.3 lb/d233%
July 2026Nitrogen, ammonia total [as N], monthly average9.4 mg/L≤ 2 mg/L370%
July 2026Nitrogen, ammonia total [as N], weekly average15.1 mg/L≤ 4 mg/L278%
August 2026Oxygen, dissolved [DO], monthly average minimum4.85 mg/L≥ 5 mg/L3%

Limits in force (56)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly average minimum≥ 5 mg/Lall year
Oxygen, dissolved [DO]monthly average minimum≥ 5 mg/Lall 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≤ 20 mg/LJan, Feb, Mar, Nov, Dec
Solids, total suspendedmonthly average≤ 20 mg/LJan, Feb, Mar, Nov, Dec
Solids, total suspendedmonthly average≤ 15 mg/LApr–Oct
Solids, total suspendedmonthly average≤ 15 mg/LApr–Oct
Solids, total suspendedweekly average≤ 30 mg/LJan, Feb, Mar, Nov, Dec
Solids, total suspendedweekly average≤ 30 mg/LJan, Feb, Mar, Nov, Dec
Solids, total suspendedweekly average≤ 23 mg/LApr–Oct
Solids, total suspendedweekly average≤ 23 mg/LApr–Oct
Solids, total suspendedmonthly average≤ 43.4 lb/dJan, Feb, Mar, Nov, Dec
Solids, total suspendedmonthly average≤ 43.4 lb/dJan, Feb, Mar, Nov, Dec
Solids, total suspendedmonthly average≤ 32.5 lb/dApr–Oct
Solids, total suspendedmonthly average≤ 32.5 lb/dApr–Oct
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/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 10 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/LApr–Oct
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/LApr–Oct
Nitrogen, ammonia total [as N]weekly average≤ 20 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 20 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 4 mg/LApr–Oct
Nitrogen, ammonia total [as N]weekly average≤ 4 mg/LApr–Oct
Nitrogen, ammonia total [as N]monthly average≤ 21.7 lb/dJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 21.7 lb/dJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 4.3 lb/dApr–Oct
Nitrogen, ammonia total [as N]monthly average≤ 4.3 lb/dApr–Oct
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
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
BOD, carbonaceous [5 day, 20 C]monthly average≤ 5 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 5 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 7.5 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 7.5 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10.8 lb/dall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10.8 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.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/LA0040126 · MCP: https://passage-data.com/mcp