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Magnolia Water Utility Operating Co., LLC - Silver Hills & the Estates Subd

Sewerage Systems, Ponchatoula, Louisiana. NPDES permit LA0127133, in force until Aug 14, 2028. Last 12 months: over a limit 11 times (last May 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A quarterly (26 values), outfall 001 form Q quarterly (12 values), outfall 01A form A quarterly (6 values)
Renewal application due
Feb 16, 2028 · 180 days before expiry; your permit may set another date
Last report on file
June 2026
Oct 2024 – Sep 2025
10 values over a limit, 0 required values missing, 0 of 28 reports late

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

Period endingParameterReportedLimitOver by
November 2025BOD, carbonaceous [5 day, 20 C], monthly average10.47 mg/L≤ 10 mg/L5%
November 2025Solids, total suspended, daily maximum25 mg/L≤ 23 mg/L9%
December 2025BOD, carbonaceous [5 day, 20 C], monthly average10.26 mg/L≤ 10 mg/L3%
January 2026BOD, carbonaceous [5 day, 20 C], daily maximum16 mg/L≤ 15 mg/L7%
January 2026BOD, carbonaceous [5 day, 20 C], monthly average13.43 mg/L≤ 10 mg/L34%
February 2026BOD, carbonaceous [5 day, 20 C], daily maximum16 mg/L≤ 15 mg/L7%
February 2026BOD, carbonaceous [5 day, 20 C], monthly average10.84 mg/L≤ 10 mg/L8%
March 2026BOD, carbonaceous [5 day, 20 C], daily maximum37 mg/L≤ 15 mg/L147%
March 2026BOD, carbonaceous [5 day, 20 C], monthly average21.37 mg/L≤ 10 mg/L114%
May 2026BOD, carbonaceous [5 day, 20 C], daily maximum18 mg/L≤ 15 mg/L20%
May 2026BOD, carbonaceous [5 day, 20 C], monthly average14.97 mg/L≤ 10 mg/L50%

Limits in force (44)

ParameterStatisticLimitMonthsOutfall
pHinstantaneous minimum≥ 6 SUall year001
pHinstantaneous minimum≥ 6 SUall year001
pHinstantaneous maximum≤ 9 SUall year001
pHinstantaneous maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 15 mg/Lall year001
Solids, total suspendedmonthly average≤ 15 mg/Lall year001
Solids, total suspendeddaily maximum≤ 23 mg/Lall year001
Solids, total suspendeddaily maximum≤ 23 mg/Lall year001
Solids, total suspendedmonthly average≤ 32.5 lb/dall year001
Solids, total suspendedmonthly average≤ 32.5 lb/dall year001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, total [as N]monthly averagereport only (lb/d)all year001
Phosphorus, total [as P]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
Phosphorus, total [as P]monthly averagereport only (lb/d)all year001
Chloride [as Cl]monthly averagereport only (mg/L)all year001
Chloride [as Cl]daily maximumreport only (mg/L)all year001
Chloride [as Cl]monthly averagereport only (lb/d)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residualinstantaneous maximum≤ .033 mg/Lall year001
Chlorine, total residualinstantaneous maximum≤ .033 mg/Lall year001
Solids, total dissolvedmonthly averagereport only (mg/L)all year001
Solids, total dissolveddaily maximumreport only (mg/L)all year001
Solids, total dissolvedmonthly averagereport only (lb/d)all year001
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year001
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year001
Coliform, fecal generaldaily maximum≤ 400 #/100mLall year001
Coliform, fecal generaldaily maximum≤ 400 #/100mLall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 15 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 15 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 21.7 lb/dall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 21.7 lb/dall year001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year01A
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year01A
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year01A
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year01A
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)all year01A
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)all year01A

New limits from Aug 15, 2028

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Nitrogen, ammonia total [as N], daily maximum6.5 mg/Lnew4.6 mg/L (9 values)0.708×
Nitrogen, ammonia total [as N], monthly average5.9 lb/dnew0.734 lb/d (9 values, 2 below detection)0.124×
Nitrogen, ammonia total [as N], monthly average2.7 mg/Lnew1.8 mg/L (9 values, 2 below detection)0.667×

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/LA0127133 · MCP: https://passage-data.com/mcp