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Tishomingo Co Board of Supervisors, Tri State Commerce Park

Sewerage Systems, Iuka, Mississippi. NPDES permit MS0044954 expired May 31, 2026; its limits still apply. Last 12 months: over a limit 5 times (last June 2026), 7 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (33 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
10 values over a limit, 0 required values missing, 7 of 12 reports late

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

Period endingParameterReportedLimitOver by
December 2025E. coli, daily maximum2420 #/100mL≤ 410 #/100mL490%
December 2025E. coli, maximum monthly average1215 #/100mL≤ 126 #/100mL864%
January 2026E. coli, maximum monthly average135 #/100mL≤ 126 #/100mL7%
June 2026E. coli, daily maximum1414 #/100mL≤ 410 #/100mL245%
June 2026E. coli, maximum monthly average707 #/100mL≤ 126 #/100mL461%

Limits in force (33)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
Oxygen, dissolved [DO]minimumreport only (mg/L)all year
Oxygen, dissolved [DO]maximumreport only (mg/L)all year
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 15 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 22.5 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 3.8 lb/dall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 5.6 lb/dall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmaximum monthly average≤ 30 mg/Lall year
Solids, total suspendeddaily maximum≤ 45 mg/Lall year
Solids, total suspendedmaximum monthly average≤ 7.5 lb/dall year
Solids, total suspendeddaily maximum≤ 11.3 lb/dall 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 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 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≤ .03 MGDall year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualmaximum monthly averagereport only (mg/L)all year
Chlorine, total residualdaily maximum≤ .5 mg/Lall year
E. colimaximum monthly average≤ 126 #/100mLall year
E. colidaily maximum≤ 410 #/100mLall year
Sludge settleability 30 minuteminimumreport only (mL/L)all year
Sludge settleability 30 minutemaximumreport only (mL/L)all year

How strict are these limits?

Cited limits by parameter: Mississippi's rules and the federal ones.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MS0044954 · MCP: https://passage-data.com/mcp