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Leland Potw

Sewage treatment plant, Leland, Mississippi. NPDES permit MS0020761 expired May 31, 2025; its limits still apply. Last 12 months: over a limit 6 times (last December 2025), 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
10 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, 20 deg. C, maximum monthly average57 mg/L≤ 17 mg/L235%
December 2025BOD, 5-day, 20 deg. C, weekly maximum57 mg/L≤ 25.5 mg/L124%
December 2025BOD, 5-day, percent removal, minimum61 %≥ 65 %11%
December 2025Solids, suspended percent removal, minimum8 %≥ 65 %163%
December 2025Solids, total suspended, maximum monthly average104 mg/L≤ 30 mg/L247%
December 2025Solids, total suspended, weekly maximum104 mg/L≤ 45 mg/L131%

Limits in force (39)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 17 mg/Lall year
BOD, 5-day, 20 deg. Cweekly maximum≤ 25.5 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 127.7 lb/dall year
BOD, 5-day, 20 deg. Cweekly maximum≤ 191.5 lb/dall year
BOD, 5-day, 20 deg. Cmaximum monthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cweekly maximumreport only (mg/L)all year
BOD, 5-day, 20 deg. Cmaximum monthly averagereport only (lb/d)all year
BOD, 5-day, 20 deg. Cweekly maximumreport only (lb/d)all year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmaximum monthly average≤ 30 mg/Lall year
Solids, total suspendedweekly maximum≤ 45 mg/Lall year
Solids, total suspendedmaximum monthly average≤ 225.3 lb/dall year
Solids, total suspendedweekly maximum≤ 338 lb/dall year
Solids, total suspendedmaximum monthly averagereport only (mg/L)all year
Solids, total suspendedweekly maximumreport only (mg/L)all year
Solids, total suspendedmaximum monthly averagereport only (lb/d)all year
Solids, total suspendedweekly maximumreport only (lb/d)all year
Nitrogen, total [as N]maximum monthly average≤ 86.4 lb/dall year
Nitrogen, total [as N]weekly maximum≤ 129.6 lb/dall year
Nitrogen, ammonia total [as N]maximum monthly average≤ 2 mg/Lall year
Nitrogen, ammonia total [as N]weekly maximum≤ 3 mg/Lall year
Nitrogen, ammonia total [as N]maximum monthly average≤ 15 lb/dall year
Nitrogen, ammonia total [as N]weekly maximum≤ 23 lb/dall year
Nitrogen, ammonia total [as N]maximum monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]weekly maximumreport only (mg/L)all year
Nitrogen, ammonia total [as N]maximum monthly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]weekly maximumreport only (lb/d)all year
Phosphorus, total [as P]maximum monthly average≤ 39 lb/dall year
Phosphorus, total [as P]weekly maximum≤ 58.5 lb/dall year
Flow, in conduit or thru treatment plantmaximum monthly average≤ .9 MGDall year
Flow, in conduit or thru treatment plantweekly maximumreport only (MGD)all year
Chlorine, total residualmaximum monthly average≤ .011 mg/Lall year
Chlorine, total residualweekly maximum≤ .019 mg/Lall year
E. colimaximum monthly average≤ 126 #/100mLall year
E. coliweekly maximum≤ 410 #/100mLall year
BOD, 5-day, percent removalminimum≥ 65 %all year
Solids, suspended 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/MS0020761 · MCP: https://passage-data.com/mcp