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Gueydan Town of - Gueydan Sewage Treatment Plant

Sewage treatment plant, Gueydan, Louisiana. NPDES permit LA0049883, in force until Sep 30, 2031. Last 12 months: over a limit 13 times (last February 2026), 9 of 9 reports late. Source: EPA ECHO, Oct 22, 2026.

Last report on file
June 2026
Oct 2024 – Sep 2025
23 values over a limit, 0 required values missing, 6 of 12 reports late

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

All 13 values over a limit
Period endingParameterReportedLimitOver by
October 2025Coliform, fecal general, monthly geometric mean> 2419.6 #/100mL≤ 200 #/100mL—
October 2025Coliform, fecal general, weekly geometric mean> 2419.6 #/100mL≤ 400 #/100mL—
December 2025Coliform, fecal general, weekly geometric mean1732.9 #/100mL≤ 400 #/100mL333%
December 2025Solids, total suspended, monthly average216 lb/d≤ 67 lb/d222%
December 2025Solids, total suspended, monthly average46 mg/L≤ 20 mg/L130%
December 2025Solids, total suspended, weekly average50 mg/L≤ 30 mg/L67%
January 2026Solids, total suspended, monthly average34 mg/L≤ 20 mg/L70%
January 2026Solids, total suspended, weekly average47 mg/L≤ 30 mg/L57%
February 2026Coliform, fecal general, monthly geometric mean691.2 #/100mL≤ 200 #/100mL246%
February 2026Coliform, fecal general, weekly geometric mean1553.1 #/100mL≤ 400 #/100mL288%
February 2026Solids, total suspended, monthly average28 mg/L≤ 20 mg/L40%
February 2026Solids, total suspended, monthly average79 lb/d≤ 67 lb/d18%
February 2026Solids, total suspended, weekly average35 mg/L≤ 30 mg/L17%

Limits in force (29)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly average minimum≥ 5 mg/Lall year
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 20 mg/Lall year
Solids, total suspendedweekly average≤ 30 mg/Lall year
Solids, total suspendedmonthly average≤ 62 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≤ 20 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 31 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
Chlorine, total residualinstantaneous maximumreport only (mg/L)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≤ 20 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 30 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 62 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

New limits from Oct 1, 2029

ParameterNew limitNew or tighterMedian, last 12 months× new limit
BOD, carbonaceous [5 day, 20 C], monthly average10 mg/Ltighter3 mg/L (9 values, 2 below detection)0.3×
BOD, carbonaceous [5 day, 20 C], monthly average31 lb/dtighter4 lb/d (9 values, 2 below detection)0.129×
BOD, carbonaceous [5 day, 20 C], weekly average15 mg/Ltighter3 mg/L (9 values, 2 below detection)0.2×
Chlorine, total residual, instantaneous maximum0.033 mg/Lnew——
Solids, total suspended, monthly average15 mg/Ltighter12 mg/L (9 values)0.8×
Solids, total suspended, monthly average46 lb/dtighter28 lb/d (9 values)0.609×
Solids, total suspended, weekly average23 mg/Ltighter16 mg/L (9 values)0.696×

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/LA0049883 · MCP: https://passage-data.com/mcp