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Town of Grand Coteau- Wastewater Treatment Facility

Sewage treatment plant, Grand Coteau, Louisiana. NPDES permit LA0072001, in force until Jul 31, 2028. Last 12 months: over a limit 46 times (last June 2026), 8 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form Q quarterly (6 values), form A quarterly
Renewal application due
Feb 2, 2028 · 180 days before expiry; your permit may set another date
Last report on file
June 2026
Oct 2024 – Sep 2025
49 values over a limit, 54 required values missing, 12 of 16 reports late

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

All 46 values over a limit
Period endingParameterReportedLimitOver by
October 2025Coliform, fecal general, monthly geometric mean714.8 #/100mL≤ 200 #/100mL257%
October 2025Coliform, fecal general, weekly geometric mean1046.2 #/100mL≤ 400 #/100mL162%
October 2025Nitrogen, ammonia total [as N], monthly average12.2 mg/L≤ 5 mg/L144%
October 2025Nitrogen, ammonia total [as N], weekly average12.5 mg/L≤ 10 mg/L25%
October 2025Solids, total suspended, monthly average16 mg/L≤ 15 mg/L7%
November 2025Coliform, fecal general, monthly geometric mean560 #/100mL≤ 200 #/100mL180%
November 2025Coliform, fecal general, weekly geometric mean2419.6 #/100mL≤ 400 #/100mL505%
November 2025Nitrogen, ammonia total [as N], monthly average12.3 mg/L≤ 5 mg/L146%
November 2025Nitrogen, ammonia total [as N], monthly average16.02 lb/d≤ 6.8 lb/d136%
November 2025Nitrogen, ammonia total [as N], weekly average12.6 mg/L≤ 10 mg/L26%
November 2025Oxygen, dissolved [DO], monthly average minimum4.5 mg/L≥ 5 mg/L10%
November 2025Solids, total suspended, monthly average20 mg/L≤ 15 mg/L33%
November 2025Solids, total suspended, monthly average25.7 lb/d≤ 20.4 lb/d26%
November 2025Solids, total suspended, weekly average24 mg/L≤ 23 mg/L4%
December 2025Coliform, fecal general, monthly geometric mean> 2419.6 #/100mL≤ 200 #/100mL—
December 2025Coliform, fecal general, weekly geometric mean> 2419.6 #/100mL≤ 400 #/100mL—
December 2025Nitrogen, ammonia total [as N], monthly average13.12 lb/d≤ 6.8 lb/d93%
December 2025Nitrogen, ammonia total [as N], monthly average7.31 mg/L≤ 5 mg/L46%
December 2025Oxygen, dissolved [DO], monthly average minimum4.9 mg/L≥ 5 mg/L2%
December 2025Solids, total suspended, monthly average22 mg/L≤ 15 mg/L47%
December 2025Solids, total suspended, monthly average39.3 lb/d≤ 20.4 lb/d93%
January 2026Solids, total suspended, monthly average26 mg/L≤ 20 mg/L30%
January 2026Solids, total suspended, monthly average28.1 lb/d≤ 27.2 lb/d3%
February 2026Oxygen, dissolved [DO], monthly average minimum4.9 mg/L≥ 5 mg/L2%
February 2026Solids, total suspended, monthly average28.8 lb/d≤ 27.2 lb/d6%
March 2026Coliform, fecal general, monthly geometric mean720.1 #/100mL≤ 200 #/100mL260%
March 2026Coliform, fecal general, weekly geometric mean2419.6 #/100mL≤ 400 #/100mL505%
March 2026Solids, total suspended, monthly average55.1 lb/d≤ 27.2 lb/d103%
April 2026Coliform, fecal general, monthly geometric mean257.5 #/100mL≤ 200 #/100mL29%
April 2026Coliform, fecal general, weekly geometric mean547.5 #/100mL≤ 400 #/100mL37%
April 2026Oxygen, dissolved [DO], monthly average minimum4.2 mg/L≥ 5 mg/L16%
April 2026Solids, total suspended, monthly average28 mg/L≤ 20 mg/L40%
May 2026BOD, carbonaceous [5 day, 20 C], monthly average36.9 lb/d≤ 13.6 lb/d171%
May 2026Coliform, fecal general, monthly geometric mean> 2419.6 #/100mL≤ 200 #/100mL—
May 2026Coliform, fecal general, weekly geometric mean> 2419.6 #/100mL≤ 400 #/100mL—
May 2026Nitrogen, ammonia total [as N], monthly average16.1 lb/d≤ 6.8 lb/d137%
May 2026Solids, total suspended, monthly average24 mg/L≤ 15 mg/L60%
May 2026Solids, total suspended, monthly average96.3 lb/d≤ 20.4 lb/d372%
May 2026Solids, total suspended, weekly average26 mg/L≤ 23 mg/L13%
June 2026BOD, carbonaceous [5 day, 20 C], monthly average30.5 lb/d≤ 13.6 lb/d124%
June 2026Coliform, fecal general, monthly geometric mean> 2419.6 #/100mL≤ 200 #/100mL—
June 2026Coliform, fecal general, weekly geometric mean> 2419.6 #/100mL≤ 400 #/100mL—
June 2026Nitrogen, ammonia total [as N], monthly average22.45 lb/d≤ 6.8 lb/d230%
June 2026Solids, total suspended, monthly average21 mg/L≤ 15 mg/L40%
June 2026Solids, total suspended, monthly average94.5 lb/d≤ 20.4 lb/d363%
June 2026Solids, total suspended, weekly average25 mg/L≤ 23 mg/L9%

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–Apr
Solids, total suspendedmonthly average≤ 20 mg/LJan–Apr
Solids, total suspendedmonthly average≤ 15 mg/LMay–Dec
Solids, total suspendedmonthly average≤ 15 mg/LMay–Dec
Solids, total suspendedweekly average≤ 30 mg/LJan–Apr
Solids, total suspendedweekly average≤ 30 mg/LJan–Apr
Solids, total suspendedweekly average≤ 23 mg/LMay–Dec
Solids, total suspendedweekly average≤ 23 mg/LMay–Dec
Solids, total suspendedmonthly average≤ 27.2 lb/dJan–Apr
Solids, total suspendedmonthly average≤ 27.2 lb/dJan–Apr
Solids, total suspendedmonthly average≤ 20.4 lb/dMay–Dec
Solids, total suspendedmonthly average≤ 20.4 lb/dMay–Dec
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≤ 5 mg/LMay–Dec
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/LMay–Dec
Nitrogen, ammonia total [as N]monthly average≤ 10 mg/LJan–Apr
Nitrogen, ammonia total [as N]monthly average≤ 10 mg/LJan–Apr
Nitrogen, ammonia total [as N]weekly average≤ 10 mg/LMay–Dec
Nitrogen, ammonia total [as N]weekly average≤ 10 mg/LMay–Dec
Nitrogen, ammonia total [as N]weekly average≤ 20 mg/LJan–Apr
Nitrogen, ammonia total [as N]weekly average≤ 20 mg/LJan–Apr
Nitrogen, ammonia total [as N]monthly average≤ 6.8 lb/dMay–Dec
Nitrogen, ammonia total [as N]monthly average≤ 6.8 lb/dMay–Dec
Nitrogen, ammonia total [as N]monthly average≤ 13.6 lb/dJan–Apr
Nitrogen, ammonia total [as N]monthly average≤ 13.6 lb/dJan–Apr
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≤ 20 mg/LJan–Apr
BOD, carbonaceous [5 day, 20 C]monthly average≤ 20 mg/LJan–Apr
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/LMay–Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/LMay–Dec
BOD, carbonaceous [5 day, 20 C]weekly average≤ 30 mg/LJan–Apr
BOD, carbonaceous [5 day, 20 C]weekly average≤ 30 mg/LJan–Apr
BOD, carbonaceous [5 day, 20 C]weekly average≤ 15 mg/LMay–Dec
BOD, carbonaceous [5 day, 20 C]weekly average≤ 15 mg/LMay–Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 27.2 lb/dJan–Apr
BOD, carbonaceous [5 day, 20 C]monthly average≤ 27.2 lb/dJan–Apr
BOD, carbonaceous [5 day, 20 C]monthly average≤ 13.6 lb/dMay–Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 13.6 lb/dMay–Dec

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/LA0072001 · MCP: https://passage-data.com/mcp