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Magnolia Water Utility Operating Co., LLC - Terrebonne Sewerage System

Sewerage Systems, Houma, Louisiana. NPDES permit LA0113255, in force until Jul 14, 2028. Last 12 months: over a limit 49 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A quarterly (14 values), form Q quarterly (6 values)
Renewal application due
Jan 16, 2028 · 180 days before expiry; your permit may set another date
Last report on file
June 2026
Oct 2024 – Sep 2025
50 values over a limit, 0 required values missing, 0 of 16 reports late

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

All 49 values over a limit
Period endingParameterReportedLimitOver by
October 2025BOD, 5-day, 20 deg. C, daily maximum26 mg/L≤ 15 mg/L73%
October 2025BOD, 5-day, 20 deg. C, monthly average20.67 lb/d≤ 16.7 lb/d24%
October 2025BOD, 5-day, 20 deg. C, monthly average24 mg/L≤ 10 mg/L140%
October 2025Solids, total suspended, daily maximum50 mg/L≤ 23 mg/L117%
October 2025Solids, total suspended, monthly average28.11 lb/d≤ 25 lb/d12%
October 2025Solids, total suspended, monthly average34.6 mg/L≤ 15 mg/L131%
November 2025BOD, 5-day, 20 deg. C, daily maximum18 mg/L≤ 15 mg/L20%
November 2025BOD, 5-day, 20 deg. C, monthly average15.17 mg/L≤ 10 mg/L52%
November 2025Solids, total suspended, daily maximum39 mg/L≤ 23 mg/L70%
November 2025Solids, total suspended, monthly average29.6 lb/d≤ 25 lb/d18%
November 2025Solids, total suspended, monthly average33 mg/L≤ 15 mg/L120%
December 2025BOD, 5-day, 20 deg. C, daily maximum24 mg/L≤ 15 mg/L60%
December 2025BOD, 5-day, 20 deg. C, monthly average17.76 mg/L≤ 10 mg/L78%
December 2025BOD, 5-day, 20 deg. C, monthly average18.31 lb/d≤ 16.7 lb/d10%
December 2025Solids, total suspended, daily maximum54 mg/L≤ 23 mg/L135%
December 2025Solids, total suspended, monthly average28.36 lb/d≤ 25 lb/d13%
December 2025Solids, total suspended, monthly average43.71 mg/L≤ 15 mg/L191%
January 2026BOD, 5-day, 20 deg. C, monthly average12.73 mg/L≤ 10 mg/L27%
January 2026Solids, total suspended, daily maximum35 mg/L≤ 23 mg/L52%
January 2026Solids, total suspended, monthly average27.88 mg/L≤ 15 mg/L86%
February 2026BOD, 5-day, 20 deg. C, daily maximum20 mg/L≤ 15 mg/L33%
February 2026BOD, 5-day, 20 deg. C, monthly average140 lb/d≤ 16.7 lb/d738%
February 2026BOD, 5-day, 20 deg. C, monthly average17 mg/L≤ 10 mg/L70%
February 2026Solids, total suspended, daily maximum49 mg/L≤ 23 mg/L113%
February 2026Solids, total suspended, monthly average147 lb/d≤ 25 lb/d488%
February 2026Solids, total suspended, monthly average36 mg/L≤ 15 mg/L140%
March 2026BOD, 5-day, 20 deg. C, daily maximum19 mg/L≤ 15 mg/L27%
March 2026BOD, 5-day, 20 deg. C, monthly average15 mg/L≤ 10 mg/L50%
March 2026BOD, 5-day, 20 deg. C, monthly average18 lb/d≤ 16.7 lb/d8%
March 2026Solids, total suspended, daily maximum38 mg/L≤ 23 mg/L65%
March 2026Solids, total suspended, monthly average28 mg/L≤ 15 mg/L87%
April 2026BOD, 5-day, 20 deg. C, daily maximum56 mg/L≤ 15 mg/L273%
April 2026BOD, 5-day, 20 deg. C, monthly average30.63 lb/d≤ 16.7 lb/d83%
April 2026BOD, 5-day, 20 deg. C, monthly average45.22 mg/L≤ 10 mg/L352%
April 2026Solids, total suspended, daily maximum111 mg/L≤ 23 mg/L383%
April 2026Solids, total suspended, monthly average47.38 lb/d≤ 25 lb/d90%
April 2026Solids, total suspended, monthly average74.35 mg/L≤ 15 mg/L396%
May 2026BOD, 5-day, 20 deg. C, daily maximum22 mg/L≤ 15 mg/L47%
May 2026BOD, 5-day, 20 deg. C, monthly average21.48 mg/L≤ 10 mg/L115%
May 2026BOD, 5-day, 20 deg. C, monthly average88.88 lb/d≤ 16.7 lb/d432%
May 2026Solids, total suspended, daily maximum66 mg/L≤ 23 mg/L187%
May 2026Solids, total suspended, monthly average277.14 lb/d≤ 25 lb/d1009%
May 2026Solids, total suspended, monthly average49.67 mg/L≤ 15 mg/L231%
June 2026BOD, 5-day, 20 deg. C, daily maximum31 mg/L≤ 15 mg/L107%
June 2026BOD, 5-day, 20 deg. C, monthly average284.99 lb/d≤ 16.7 lb/d1607%
June 2026BOD, 5-day, 20 deg. C, monthly average31 mg/L≤ 10 mg/L210%
June 2026Solids, total suspended, daily maximum76 mg/L≤ 23 mg/L230%
June 2026Solids, total suspended, monthly average425.38 lb/d≤ 25 lb/d1602%
June 2026Solids, total suspended, monthly average50.22 mg/L≤ 15 mg/L235%

Limits in force (20)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 15 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 16.7 lb/dall year
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 15 mg/Lall year
Solids, total suspendeddaily maximum≤ 23 mg/Lall year
Solids, total suspendedmonthly average≤ 25 lb/dall year
Oil & Greasedaily maximum≤ 15 mg/Lall 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 plantdaily maximumreport only (MGD)all year
Chlorine, total residualinstantaneous maximum≤ .033 mg/Lall year
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year
Coliform, fecal generaldaily maximum≤ 400 #/100mLall year

How strict are these limits?

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

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Your permit document is the final word. As JSON: /api/v1/permits/LA0113255 · MCP: https://passage-data.com/mcp