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Macon Potw

Sewage treatment plant, Macon, Mississippi. NPDES permit MS0020796, in force until Jul 31, 2029. Last 12 months: over a limit 5 times (last December 2025). 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
9 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 2025BOD, 5-day, 20 deg. C, maximum monthly average328.26 lb/d≤ 200 lb/d64%
December 2025BOD, 5-day, 20 deg. C, maximum weekly average328.26 lb/d≤ 300 lb/d9%
December 2025E. coli, maximum monthly average> 8000 #/100mL≤ 126 #/100mL—
December 2025E. coli, maximum weekly average> 8000 #/100mL≤ 410 #/100mL—
December 2025Flow, in conduit or thru treatment plant, maximum monthly average2.279 MGD≤ .6 MGD280%

Limits in force (41)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 40 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 60 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 200 lb/dall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 300 lb/dall year
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≤ 90 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 135 mg/Lall year
Solids, total suspendedmaximum monthly average≤ 450 lb/dall year
Solids, total suspendedmaximum weekly average≤ 676 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 average≤ 57.55 lb/dall year
Nitrogen, total [as N]maximum weekly average≤ 86.33 lb/dall year
Nitrogen, ammonia total [as N]maximum monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]maximum weekly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]maximum monthly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]maximum weekly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]maximum monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]maximum weekly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]maximum monthly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]maximum weekly averagereport only (lb/d)all 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 average≤ 29.05 lb/dall year
Phosphorus, total [as P]maximum weekly average≤ 43.58 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≤ .4 mg/Lall year
Chlorine, total residualmaximum weekly average≤ .7 mg/Lall year
E. colimaximum monthly average≤ 126 #/100mLall year
E. colimaximum weekly average≤ 410 #/100mLall year
BOD, 5-day, percent removalminimum≥ 65 %all year

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/MS0020796 · MCP: https://passage-data.com/mcp