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Magnolia Water Utility Operating Co., LLC

Sewerage Systems, Slidell, Louisiana. NPDES permit LA0073148, in force until Oct 31, 2029. Last 12 months: over a limit 27 times (last May 2026), 6 required values missing, 1 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 29 days after each period: form A quarterly (34 values), form Q quarterly (6 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
4 values over a limit, 2 required values missing, 1 of 16 reports late

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

All 27 values over a limit
Period endingParameterReportedLimitOver by
February 2026BOD, carbonaceous [5 day, 20 C], daily maximum111 mg/L≤ 15 mg/L640%
February 2026BOD, carbonaceous [5 day, 20 C], monthly geometric mean88 mg/L≤ 10 mg/L780%
February 2026BOD, carbonaceous [5 day, 20 C], monthly average57 lb/d≤ 23 lb/d148%
February 2026Nitrogen, ammonia total [as N], daily maximum10 mg/L≤ 4 mg/L150%
February 2026Nitrogen, ammonia total [as N], monthly average10 mg/L≤ 2 mg/L400%
February 2026Nitrogen, ammonia total [as N], monthly average8.1 lb/d≤ 4.6 lb/d76%
February 2026Solids, total suspended, daily maximum39 mg/L≤ 23 mg/L70%
February 2026Solids, total suspended, monthly average29 mg/L≤ 15 mg/L93%
March 2026BOD, carbonaceous [5 day, 20 C], daily maximum63 mg/L≤ 15 mg/L320%
March 2026BOD, carbonaceous [5 day, 20 C], monthly geometric mean58 mg/L≤ 10 mg/L480%
March 2026BOD, carbonaceous [5 day, 20 C], monthly average99 lb/d≤ 23 lb/d330%
March 2026Coliform, fecal general, daily maximum13800 #/100mL≤ 400 #/100mL3350%
March 2026Coliform, fecal general, monthly geometric mean< 235 #/100mL≤ 200 #/100mL17%
March 2026Nitrogen, ammonia total [as N], daily maximum30 mg/L≤ 4 mg/L650%
March 2026Nitrogen, ammonia total [as N], monthly average30 mg/L≤ 2 mg/L1400%
March 2026Nitrogen, ammonia total [as N], monthly average46 lb/d≤ 4.6 lb/d900%
March 2026Solids, total suspended, daily maximum58 mg/L≤ 23 mg/L152%
March 2026Solids, total suspended, monthly average38 mg/L≤ 15 mg/L153%
March 2026Solids, total suspended, monthly average64 lb/d≤ 35 lb/d83%
April 2026BOD, carbonaceous [5 day, 20 C], daily maximum19 mg/L≤ 15 mg/L27%
April 2026BOD, carbonaceous [5 day, 20 C], monthly geometric mean11 mg/L≤ 10 mg/L10%
April 2026Nitrogen, ammonia total [as N], daily maximum5 mg/L≤ 4 mg/L25%
April 2026Nitrogen, ammonia total [as N], monthly average< 3 mg/L≤ 2 mg/L50%
April 2026Nitrogen, ammonia total [as N], monthly average< 5.3 lb/d≤ 4.6 lb/d15%
May 2026Nitrogen, ammonia total [as N], daily maximum5 mg/L≤ 4 mg/L25%
May 2026Nitrogen, ammonia total [as N], monthly average4 mg/L≤ 2 mg/L100%
May 2026Nitrogen, ammonia total [as N], monthly average8.8 lb/d≤ 4.6 lb/d91%

Limits in force (40)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly average minimum≥ 2 mg/Lall year
Oxygen, dissolved [DO]monthly average minimum≥ 2 mg/Lall 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 suspendeddaily maximum≤ 23 mg/Lall year
Solids, total suspendeddaily maximum≤ 23 mg/Lall year
Solids, total suspendedmonthly average≤ 35 lb/dall year
Solids, total suspendedmonthly average≤ 35 lb/dall year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]daily maximumreport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/Lall year
Nitrogen, ammonia total [as N]daily maximum≤ 4 mg/Lall year
Nitrogen, ammonia total [as N]daily maximum≤ 4 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 4.6 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 4.6 lb/dall year
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
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 plantdaily maximumreport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualinstantaneous maximumreport only (mg/L)all year
Chlorine, total residualinstantaneous maximumreport only (mg/L)all year
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year
Coliform, fecal generaldaily maximum≤ 400 #/100mLall year
Coliform, fecal generaldaily maximum≤ 400 #/100mLall year
BOD, carbonaceous [5 day, 20 C]monthly geometric mean≤ 10 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly geometric mean≤ 10 mg/Lall year
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 15 mg/Lall year
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 15 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 23 lb/dall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 23 lb/dall year

New limits from Nov 1, 2027

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Chlorine, total residual, instantaneous maximum0.033 mg/Lnew1.64 mg/L (9 values)49.7×

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/LA0073148 · MCP: https://passage-data.com/mcp