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Lake Lorman Potw

Sewage treatment plant, Madison, Mississippi. NPDES permit MS0043401, in force until Apr 30, 2030. Last 12 months: over a limit 9 times (last December 2025), 2 required values missing, 1 of 1 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form Y yearly
Last report on file
December 2025
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 1 of 1 report late

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

Period endingParameterReportedLimitOver by
December 2025BOD, 5-day, percent removal, minimum8 %≥ 85 %513%
December 2025E. coli, maximum monthly average> 2420 #/100mL≤ 126 #/100mL—
December 2025E. coli, maximum weekly average> 2420 #/100mL≤ 410 #/100mL—
December 2025Nitrogen, ammonia total [as N], maximum monthly average2.61 lb/d≤ 1.06 lb/d146%
December 2025Nitrogen, ammonia total [as N], maximum monthly average2.61 lb/d≤ 1.06 lb/d146%
December 2025Nitrogen, ammonia total [as N], maximum monthly average2.61 mg/L≤ 2 mg/L31%
December 2025Nitrogen, ammonia total [as N], maximum weekly average2.61 lb/d≤ 1.59 lb/d64%
December 2025Nitrogen, ammonia total [as N], maximum weekly average2.61 lb/d≤ 1.59 lb/d64%
December 2025Solids, total suspended, maximum monthly average38 mg/L≤ 30 mg/L27%

Limits in force (43)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 14 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 10 mg/LMay–Oct
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 21 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 15 mg/LMay–Oct
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 8 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 5 lb/dMay–Oct
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 11 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 8 lb/dMay–Oct
BOD, 5-day, 20 deg. Cmaximum monthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cmaximum weekly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cmaximum monthly averagereport only (lb/d)all year
BOD, 5-day, 20 deg. Cmaximum weekly averagereport only (lb/d)all 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≤ 16 lb/dall year
Solids, total suspendedmaximum weekly average≤ 24 lb/dall year
Solids, total suspendedmaximum monthly averagereport only (mg/L)all year
Solids, total suspendedmaximum weekly averagereport only (mg/L)all year
Solids, total suspendedmaximum monthly averagereport only (lb/d)all year
Solids, total suspendedmaximum weekly averagereport only (lb/d)all year
Nitrogen, total [as N]maximum monthly averagereport only (mg/L)all year
Nitrogen, total [as N]maximum weekly averagereport only (mg/L)all year
Nitrogen, total [as N]maximum monthly averagereport only (lb/d)all year
Nitrogen, total [as N]maximum weekly averagereport only (lb/d)all 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≤ 1.06 lb/dall year
Nitrogen, ammonia total [as N]maximum weekly average≤ 1.59 lb/dall year
Phosphorus, total [as P]maximum monthly averagereport only (mg/L)all year
Phosphorus, total [as P]maximum weekly averagereport only (mg/L)all year
Phosphorus, total [as P]maximum monthly averagereport only (lb/d)all year
Phosphorus, total [as P]maximum weekly averagereport only (lb/d)all year
Flow, in conduit or thru treatment plantmaximum monthly average≤ .064 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 Apr 29, 2030

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 average0.73 lb/dtighter——
Nitrogen, ammonia total [as N], maximum weekly average1.09 lb/dtighter——
Nitrogen, ammonia total [as N], maximum weekly average2 mg/Ltighter——

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/MS0043401 · MCP: https://passage-data.com/mcp