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Kosciusko Potw, South

Sewage treatment plant, major discharger, Kosciusko, Mississippi. NPDES permit MS0027774, in force until Dec 31, 2027. Last 12 months: over a limit 14 times (last August 2026), 138 required values missing, 7 of 15 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (39 values), form Q quarterly (2 values), form Y yearly
Renewal application due
Jul 4, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
13 values over a limit, 6 required values missing, 8 of 17 reports late

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

All 14 values over a limit
Period endingParameterReportedLimitOver by
October 2025Solids, suspended percent removal, minimum52 %≥ 65 %37%
December 2025E. coli, monthly average530 #/100mL≤ 126 #/100mL321%
December 2025E. coli, monthly average530 #/100mL≤ 126 #/100mL321%
December 2025E. coli, maximum weekly average530 #/100mL≤ 410 #/100mL29%
December 2025E. coli, maximum weekly average530 #/100mL≤ 410 #/100mL29%
December 2025Solids, suspended percent removal, minimum51 %≥ 65 %40%
December 2025Solids, suspended percent removal, minimum51 %≥ 65 %40%
May 2026Chlorine, total residual, monthly average.19 mg/L≤ .091 mg/L109%
May 2026Solids, suspended percent removal, minimum40 %≥ 65 %71%
June 2026Solids, suspended percent removal, minimum56 %≥ 65 %26%
July 2026BOD, 5-day, 20 deg. C, monthly average34 mg/L≤ 30 mg/L13%
July 2026BOD, 5-day, percent removal, minimum48 %≥ 65 %49%
July 2026Solids, suspended percent removal, minimum26 %≥ 65 %111%
August 2026Chlorine, total residual, monthly average.36 mg/L≤ .091 mg/L296%

Limits in force (60)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly totalreport only (lb/mo)all year
BOD, 5-day, 20 deg. Cannual average≤ 512 lb/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cmaximum weekly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cmonthly totalreport only (lb/mo)all year
BOD, 5-day, 20 deg. Cannual averagereport only (lb/d)all year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 90 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 135 mg/Lall year
Solids, total suspendedmonthly totalreport only (lb/mo)all year
Solids, total suspendedannual average≤ 1537 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedmaximum weekly averagereport only (mg/L)all year
Solids, total suspendedmonthly totalreport only (lb/mo)all year
Solids, total suspendedannual averagereport only (lb/d)all year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]maximum weekly averagereport only (mg/L)all year
Nitrogen, total [as N]maximum weekly averagereport only (mg/L)all year
Nitrogen, total [as N]monthly totalreport only (lb/mo)all year
Nitrogen, total [as N]annual average≤ 196.56 lb/dall year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]maximum weekly averagereport only (mg/L)all year
Nitrogen, total [as N]annual averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]monthly average≤ 10 mg/Lall year
Nitrogen, ammonia total [as N]maximum weekly average≤ 15 mg/Lall year
Nitrogen, ammonia total [as N]monthly totalreport only (lb/mo)all year
Nitrogen, ammonia total [as N]annual average≤ 170 lb/dall year
Nitrogen, ammonia total [as N]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]monthly totalreport only (lb/mo)all year
Nitrogen, ammonia total [as N]annual averagereport only (lb/d)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]maximum weekly averagereport only (mg/L)all year
Phosphorus, total [as P]maximum weekly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly totalreport only (lb/mo)all year
Phosphorus, total [as P]annual average≤ 47.11 lb/dall year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]maximum weekly averagereport only (mg/L)all year
Phosphorus, total [as P]annual averagereport only (lb/d)all year
Selenium, total recoverablemaximum monthly averagereport only (mg/L)all year
Selenium, total recoverablemaximum weekly averagereport only (mg/L)all year
Copper, total recoverablemonthly averagereport only (mg/L)all year
Copper, total recoverablemaximum weekly averagereport only (mg/L)all year
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all year
Flow, in conduit or thru treatment plantannual average≤ 2.048 MGDall year
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all year
Chlorine, total residualmonthly average≤ .091 mg/Lall year
Chlorine, total residualmaximum weekly average≤ .751 mg/Lall year
E. colimonthly average≤ 126 #/100mLall year
E. colimaximum weekly average≤ 410 #/100mLall year
BOD, 5-day, percent removalminimum≥ 65 %all year
Solids, suspended percent removalminimum≥ 65 %all year
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum≥ 12.11 %all year
%Effect Static Renewal 7Day Chronic Pimephales promelasminimum≥ 12.11 %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/MS0027774 · MCP: https://passage-data.com/mcp