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New Iberia, City of

Sewage treatment plant, major discharger, New Iberia, Louisiana. NPDES permit LA0120201, in force until Jun 30, 2028. Last 12 months: over a limit 15 times (last September 2026), 2 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (19 values), form ME quarterly (19 values), form MY quarterly (19 values), form Q quarterly (6 values)
Renewal application due
Jan 2, 2028 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
16 values over a limit, 0 required values missing, 0 of 24 reports late

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

All 15 values over a limit
Period endingParameterReportedLimitOver by
October 2025Nitrogen, ammonia total [as N], monthly average5.74 mg/L≤ 2 mg/L187%
October 2025Nitrogen, ammonia total [as N], weekly average10.45 mg/L≤ 4 mg/L161%
January 2026Coliform, fecal general, weekly geometric mean2419.6 CFU/100mL≤ 400 CFU/100mL505%
January 2026Nitrogen, ammonia total [as N], monthly average4.48 mg/L≤ 4.2 mg/L7%
February 2026Nitrogen, ammonia total [as N], monthly average212.5 lb/d≤ 210 lb/d1%
February 2026Nitrogen, ammonia total [as N], monthly average6.33 mg/L≤ 4.2 mg/L51%
February 2026Nitrogen, ammonia total [as N], weekly average13.4 mg/L≤ 8.4 mg/L60%
March 2026Nitrogen, ammonia total [as N], monthly average6.89 mg/L≤ 4.2 mg/L64%
May 2026Enterococci, monthly geometric mean52.8 #/100mL≤ 35 #/100mL51%
July 2026Chlorine, total residual, instantaneous maximum.09 mg/L≤ .033 mg/L173%
July 2026Enterococci, monthly geometric mean37.3 #/100mL≤ 35 #/100mL7%
August 2026Chlorine, total residual, instantaneous maximum.16 mg/L≤ .033 mg/L385%
September 2026Chlorine, total residual, instantaneous maximum.08 mg/L≤ .033 mg/L142%
September 2026Enterococci, monthly geometric mean154.3 #/100mL≤ 35 #/100mL341%
September 2026Enterococci, weekly geometric mean154.3 #/100mL≤ 135 #/100mL14%

Limits in force (67)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly average minimum≥ 5 mg/LJan, Feb, Mar, Apr, Nov, Dec
Oxygen, dissolved [DO]monthly average minimum≥ 2 mg/LMay–Oct
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≤ 751 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
Nitrogen, ammonia total [as N]monthly average≤ 4.2 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/LMay–Oct
Nitrogen, ammonia total [as N]weekly average≤ 8.4 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 4 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 210 lb/dJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 100 lb/dMay–Oct
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (lb/d)all year
Whole effluent toxicity - retest #17-day minimumreport only (pass=0;fail=1)all year
Whole effluent toxicity - retest #17-day minimumreport only (pass=0;fail=1)all year
Whole effluent toxicity - retest #1monthly average minimumreport only (pass=0;fail=1)all year
Whole effluent toxicity - retest #1monthly average minimumreport only (pass=0;fail=1)all year
Whole effluent toxicity - retest #27-day minimumreport only (pass=0;fail=1)all year
Whole effluent toxicity - retest #27-day minimumreport only (pass=0;fail=1)all year
Whole effluent toxicity - retest #2monthly average minimumreport only (pass=0;fail=1)all year
Whole effluent toxicity - retest #2monthly average minimumreport only (pass=0;fail=1)all year
WET, sublethal retest #17-day minimumreport only (pass=0;fail=1)all year
WET, sublethal retest #17-day minimumreport only (pass=0;fail=1)all year
WET, sublethal retest #1monthly average minimumreport only (pass=0;fail=1)all year
WET, sublethal retest #1monthly average minimumreport only (pass=0;fail=1)all year
WET, sublethal retest #27-day minimumreport only (pass=0;fail=1)all year
WET, sublethal retest #2monthly average minimumreport only (pass=0;fail=1)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 maximum≤ .033 mg/Lall year
Whole Effluent Toxicity - Retest #37-day minimumreport only (pass=0;fail=1)all year
Whole Effluent Toxicity - Retest #3monthly average minimumreport only (pass=0;fail=1)all year
Whole Effluent Toxicity, Sub-Lethal Retest #37-day minimumreport only (pass=0;fail=1)all year
Whole Effluent Toxicity, Sub-Lethal Retest #37-day minimumreport only (pass=0;fail=1)all year
Whole Effluent Toxicity, Sub-Lethal Retest #3monthly average minimumreport only (pass=0;fail=1)all year
Whole Effluent Toxicity, Sub-Lethal Retest #3monthly average minimumreport only (pass=0;fail=1)all year
Enterococcimonthly geometric mean≤ 35 #/100mLall year
Enterococciweekly geometric mean≤ 135 #/100mLall year
Coliform, fecal generalmonthly geometric mean≤ 200 CFU/100mLall year
Coliform, fecal generalweekly geometric mean≤ 400 CFU/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≤ 500 lb/dall year
Pass/Fail Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7-day minimumreport only (pass=0;fail=1)all year
Pass/Fail Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)monthly average minimumreport only (pass=0;fail=1)all year
Pass/Fail Static Renewal 7 Day Chronic Menidia beryllina7-day minimumreport only (pass=0;fail=1)all year
Pass/Fail Static Renewal 7 Day Chronic Menidia beryllinamonthly average minimumreport only (pass=0;fail=1)all year
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)7-day minimumreport only (pass=0;fail=1)all year
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)monthly average minimumreport only (pass=0;fail=1)all year
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia beryllina7-day minimumreport only (pass=0;fail=1)all year
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia beryllinamonthly average minimumreport only (pass=0;fail=1)all year
NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7-day minimumreport only (%)all year
NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)monthly average minimumreport only (%)all year
NOEC Lethal Static Renewal 7 Day Chronic Menidia beryllina7-day minimumreport only (%)all year
NOEC Lethal Static Renewal 7 Day Chronic Menidia beryllinamonthly average minimumreport only (%)all year
NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7-day minimumreport only (%)all year
NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)monthly average minimumreport only (%)all year
NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina7-day minimumreport only (%)all year
NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllinamonthly average minimumreport only (%)all year
Coef Of Var Static Renewal 7Day Chronic Americamysis bahia (formerly Mysidopsis bahia)maximumreport only (%)all year
Coef Of Var Static Renewal 7Day Chronic Menidia beryllinamaximumreport only (%)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/LA0120201 · MCP: https://passage-data.com/mcp