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Sewerage District No. 1 of Iberia Parish

Sewage treatment plant, New Iberia, Louisiana. NPDES permit LA0092550, in force until Dec 14, 2027. Last 12 months: over a limit 5 times (last May 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A quarterly (30 values), form Q quarterly (6 values)
Renewal application due
Jun 17, 2027 · 180 days before expiry; your permit may set another date
Last report on file
June 2026
Oct 2024 – Sep 2025
0 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 2025BOD, 5-day, 20 deg. C, monthly average13 mg/L≤ 10 mg/L30%
January 2026Coliform, fecal general, weekly geometric mean410.6 CFU/100mL≤ 400 CFU/100mL3%
April 2026Coliform, fecal general, monthly geometric mean940.3 CFU/100mL≤ 200 CFU/100mL370%
April 2026Coliform, fecal general, weekly geometric mean2419.6 CFU/100mL≤ 400 CFU/100mL505%
May 2026Enterococci, weekly geometric mean248.9 CFU/100mL≤ 135 CFU/100mL84%

Limits in force (36)

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≤ 12.5 lb/dall year
BOD, 5-day, 20 deg. Cmonthly average≤ 12.5 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≤ 19 lb/dall year
Solids, total suspendedmonthly average≤ 19 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 residualdaily maximum≤ .033 mg/Lall year
Chlorine, total residualdaily maximum≤ .033 mg/Lall year
Enterococcimonthly geometric mean≤ 35 CFU/100mLall year
Enterococcimonthly geometric mean≤ 35 CFU/100mLall year
Enterococciweekly geometric mean≤ 135 CFU/100mLall year
Enterococciweekly geometric mean≤ 135 CFU/100mLall year
Coliform, fecal generalmonthly geometric mean≤ 200 CFU/100mLall year
Coliform, fecal generalmonthly geometric mean≤ 200 CFU/100mLall year
Coliform, fecal generalweekly geometric mean≤ 400 CFU/100mLall year
Coliform, fecal generalweekly geometric mean≤ 400 CFU/100mLall 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/LA0092550 · MCP: https://passage-data.com/mcp