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Louisville Potw, South

Sewage treatment plant, Louisville, Mississippi. NPDES permit MS0025836, in force until Dec 31, 2027. Last 12 months: over a limit 2 times (last December 2025), 2 required values missing, 1 of 1 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 29 days after each period: form Y yearly
Renewal application due
Jul 4, 2027 · 180 days before expiry; your permit may set another date
Last report on file
December 2025
Oct 2024 – Sep 2025
3 values over a limit, 0 required values missing, 0 of 1 report late

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

Period endingParameterReportedLimitOver by
December 2025Nitrogen, total [as N], maximum monthly average24.397 lb/d≤ 22.54 lb/d8%
December 2025Phosphorus, total [as P], maximum monthly average7.266 lb/d≤ 5.01 lb/d45%

Limits in force (27)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 10 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 15 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 50 lb/dall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 75 lb/dall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmaximum monthly average≤ 30 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall year
Solids, total suspendedmaximum monthly average≤ 150 lb/dall year
Solids, total suspendedmaximum weekly average≤ 225 lb/dall year
Nitrogen, total [as N]maximum monthly average≤ 22.54 lb/dall year
Nitrogen, total [as N]maximum weekly average≤ 33.81 lb/dall year
Nitrogen, ammonia total [as N]maximum monthly average≤ 2 mg/Lall year
Nitrogen, ammonia total [as N]maximum weekly average≤ 3 mg/Lall year
Nitrogen, ammonia total [as N]maximum monthly average≤ 10 lb/dall year
Nitrogen, ammonia total [as N]maximum weekly average≤ 15 lb/dall year
Phosphorus, total [as P]maximum monthly average≤ 5.01 lb/dall year
Phosphorus, total [as P]maximum weekly average≤ 7.51 lb/dall year
Flow, in conduit or thru treatment plantmaximum monthly average≤ .6 MGDall year
Flow, in conduit or thru treatment plantmaximum weekly averagereport only (MGD)all year
Chlorine, total residualmaximum monthly average≤ .011 mg/Lall year
Chlorine, total residualmaximum weekly average≤ .019 mg/Lall year
E. colimaximum monthly average≤ 126 #/100mLall year
E. colimaximum weekly average≤ 410 #/100mLall year
BOD, 5-day, percent removalminimum≥ 85 %all year
Solids, suspended percent removalminimum≥ 85 %all year

New limits from Dec 30, 2027

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Nitrogen, ammonia total [as N], maximum monthly average1.37 mg/Ltighter——
Nitrogen, ammonia total [as N], maximum monthly average6.85 lb/dtighter——
Nitrogen, ammonia total [as N], maximum weekly average2.05 mg/Ltighter——
Nitrogen, ammonia total [as N], maximum weekly average10.32 lb/dtighter——

How strict are these limits?

Cited limits by parameter: Mississippi'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/MS0025836 · MCP: https://passage-data.com/mcp