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St. Bernard Parish-Riverbend Oxidation Pond/Poydras-Verret Wetland

Sewage treatment plant, Chalmette, Louisiana. NPDES permit LA0040185, in force until Aug 31, 2027. Last 12 months: over a limit 58 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 118 days after each period: form A quarterly (24 values), form Q quarterly (6 values), form S twice a year, form WM yearly
Renewal application due
Mar 4, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
69 values over a limit, 0 required values missing, 1 of 19 reports late

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

All 58 values over a limit
Period endingParameterReportedLimitOver by
October 2025BOD, 5-day, 20 deg. C, monthly average49.04 mg/L≤ 30 mg/L63%
October 2025BOD, 5-day, 20 deg. C, weekly average60 mg/L≤ 45 mg/L33%
October 2025Coliform, fecal general, monthly geometric mean769.75053 #/100mL≤ 200 #/100mL285%
October 2025Coliform, fecal general, weekly geometric mean2419.5801 #/100mL≤ 400 #/100mL505%
October 2025Solids, total suspended, monthly average140.12 mg/L≤ 90 mg/L56%
October 2025Solids, total suspended, weekly average163.3 mg/L≤ 135 mg/L21%
November 2025BOD, 5-day, 20 deg. C, monthly average62.05 mg/L≤ 30 mg/L107%
November 2025BOD, 5-day, 20 deg. C, weekly average69.6 mg/L≤ 45 mg/L55%
November 2025Coliform, fecal general, monthly geometric mean2419.5801 #/100mL≤ 200 #/100mL1110%
November 2025Coliform, fecal general, weekly geometric mean2419.5801 #/100mL≤ 400 #/100mL505%
November 2025Solids, total suspended, monthly average164.11 mg/L≤ 90 mg/L82%
November 2025Solids, total suspended, weekly average194.54 mg/L≤ 135 mg/L44%
December 2025BOD, 5-day, 20 deg. C, monthly average53.96 mg/L≤ 30 mg/L80%
December 2025BOD, 5-day, 20 deg. C, weekly average75.3 mg/L≤ 45 mg/L67%
December 2025Coliform, fecal general, monthly geometric mean2419.5801 #/100mL≤ 200 #/100mL1110%
December 2025Coliform, fecal general, weekly geometric mean2419.5801 #/100mL≤ 400 #/100mL505%
January 2026BOD, 5-day, 20 deg. C, monthly average67.5 mg/L≤ 30 mg/L125%
January 2026BOD, 5-day, 20 deg. C, weekly average78.6 mg/L≤ 45 mg/L75%
January 2026Coliform, fecal general, monthly geometric mean2419.5801 #/100mL≤ 200 #/100mL1110%
January 2026Coliform, fecal general, weekly geometric mean2419.5801 #/100mL≤ 400 #/100mL505%
January 2026Solids, total suspended, monthly average133.53 mg/L≤ 90 mg/L48%
January 2026Solids, total suspended, weekly average156 mg/L≤ 135 mg/L16%
February 2026BOD, 5-day, 20 deg. C, monthly average199.6 lb/d≤ 175 lb/d14%
February 2026BOD, 5-day, 20 deg. C, monthly average63.1 mg/L≤ 30 mg/L110%
February 2026BOD, 5-day, 20 deg. C, weekly average77 mg/L≤ 45 mg/L71%
February 2026Coliform, fecal general, monthly geometric mean2419.5801 #/100mL≤ 200 #/100mL1110%
February 2026Coliform, fecal general, weekly geometric mean2419.5801 #/100mL≤ 400 #/100mL505%
February 2026Solids, total suspended, monthly average128.95 mg/L≤ 90 mg/L43%
February 2026Solids, total suspended, weekly average161.8 mg/L≤ 135 mg/L20%
March 2026BOD, 5-day, 20 deg. C, monthly average271.11 lb/d≤ 175 lb/d55%
March 2026BOD, 5-day, 20 deg. C, monthly average55.68 mg/L≤ 30 mg/L86%
March 2026BOD, 5-day, 20 deg. C, weekly average70.8 mg/L≤ 45 mg/L57%
March 2026Coliform, fecal general, monthly geometric mean2419.5801 #/100mL≤ 200 #/100mL1110%
March 2026Coliform, fecal general, weekly geometric mean2419.5801 #/100mL≤ 400 #/100mL505%
April 2026BOD, 5-day, 20 deg. C, monthly average192.66 lb/d≤ 175 lb/d10%
April 2026BOD, 5-day, 20 deg. C, monthly average44.34 mg/L≤ 30 mg/L48%
April 2026BOD, 5-day, 20 deg. C, weekly average62 mg/L≤ 45 mg/L38%
April 2026Coliform, fecal general, monthly geometric mean2419.5801 #/100mL≤ 200 #/100mL1110%
April 2026Coliform, fecal general, weekly geometric mean2419.5801 #/100mL≤ 400 #/100mL505%
May 2026BOD, 5-day, 20 deg. C, monthly average277.42 lb/d≤ 175 lb/d59%
May 2026BOD, 5-day, 20 deg. C, monthly average31.98 mg/L≤ 30 mg/L7%
May 2026Coliform, fecal general, monthly geometric mean2419.5801 #/100mL≤ 200 #/100mL1110%
May 2026Coliform, fecal general, weekly geometric mean2419.5801 #/100mL≤ 400 #/100mL505%
June 2026BOD, 5-day, 20 deg. C, monthly average37.45 mg/L≤ 30 mg/L25%
June 2026Coliform, fecal general, monthly geometric mean2419.5801 #/100mL≤ 200 #/100mL1110%
June 2026Coliform, fecal general, weekly geometric mean2419.5801 #/100mL≤ 400 #/100mL505%
July 2026BOD, 5-day, 20 deg. C, monthly average42.56 mg/L≤ 30 mg/L42%
July 2026BOD, 5-day, 20 deg. C, weekly average59 mg/L≤ 45 mg/L31%
July 2026Coliform, fecal general, monthly geometric mean2419.5801 #/100mL≤ 200 #/100mL1110%
July 2026Coliform, fecal general, weekly geometric mean2419.5801 #/100mL≤ 400 #/100mL505%
August 2026BOD, 5-day, 20 deg. C, monthly average38.3 mg/L≤ 30 mg/L28%
August 2026BOD, 5-day, 20 deg. C, weekly average46 mg/L≤ 45 mg/L2%
August 2026Coliform, fecal general, monthly geometric mean2419.5801 #/100mL≤ 200 #/100mL1110%
August 2026Coliform, fecal general, weekly geometric mean2419.5801 #/100mL≤ 400 #/100mL505%
September 2026BOD, 5-day, 20 deg. C, monthly average47.56 mg/L≤ 30 mg/L59%
September 2026BOD, 5-day, 20 deg. C, weekly average78 mg/L≤ 45 mg/L73%
September 2026Coliform, fecal general, monthly geometric mean2419.5801 #/100mL≤ 200 #/100mL1110%
September 2026Coliform, fecal general, weekly geometric mean2419.5801 #/100mL≤ 400 #/100mL505%

Limits in force (61)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 175 lb/dall year
BOD, 5-day, 20 deg. Cmonthly average≤ 175 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≤ 90 mg/Lall year
Solids, total suspendedmonthly average≤ 90 mg/Lall year
Solids, total suspendedweekly average≤ 135 mg/Lall year
Solids, total suspendedweekly average≤ 135 mg/Lall year
Solids, total suspendedmonthly average≤ 525 lb/dall year
Solids, total suspendedmonthly average≤ 525 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
Magnesium, total [as Mg]monthly averagereport only (mg/L)all year
Magnesium, total [as Mg]weekly averagereport only (mg/L)all year
Magnesium, total [as Mg]monthly averagereport only (lb/d)all year
Cadmium, total [as Cd]monthly averagereport only (mg/L)all year
Cadmium, total [as Cd]weekly averagereport only (mg/L)all year
Cadmium, total [as Cd]monthly averagereport only (lb/d)all year
Chromium, total [as Cr]monthly averagereport only (mg/L)all year
Chromium, total [as Cr]weekly averagereport only (mg/L)all year
Chromium, total [as Cr]monthly averagereport only (lb/d)all year
Copper, total [as Cu]monthly averagereport only (mg/L)all year
Copper, total [as Cu]weekly averagereport only (mg/L)all year
Copper, total [as Cu]monthly averagereport only (lb/d)all year
Iron, total [as Fe]monthly averagereport only (mg/L)all year
Iron, total [as Fe]weekly averagereport only (mg/L)all year
Iron, total [as Fe]monthly averagereport only (lb/d)all year
Lead, total [as Pb]monthly averagereport only (mg/L)all year
Lead, total [as Pb]weekly averagereport only (mg/L)all year
Lead, total [as Pb]monthly averagereport only (lb/d)all year
Nickel, total [as Ni]monthly averagereport only (mg/L)all year
Nickel, total [as Ni]weekly averagereport only (mg/L)all year
Nickel, total [as Ni]monthly averagereport only (lb/d)all year
Silver, total [as Ag]monthly averagereport only (mg/L)all year
Silver, total [as Ag]weekly averagereport only (mg/L)all year
Silver, total [as Ag]monthly averagereport only (lb/d)all year
Zinc, total [as Zn]monthly averagereport only (mg/L)all year
Zinc, total [as Zn]weekly averagereport only (mg/L)all year
Zinc, total [as Zn]monthly averagereport only (lb/d)all year
Selenium, total [as Se]monthly averagereport only (mg/L)all year
Selenium, total [as Se]weekly averagereport only (mg/L)all year
Selenium, total [as Se]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
Wetlands Monitoringminimum≥ 1 N=0;Y=1all 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

Cited limits by parameter: Louisiana's rules and the federal ones.

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