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Coldwater Potw, Southwest

Sewage treatment plant, Coldwater, Mississippi. NPDES permit MS0024678, in force until Nov 30, 2029. Last 12 months: over a limit 20 times (last December 2025), 35 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
6 values over a limit, 0 required values missing, 0 of 1 report late

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

All 20 values over a limit
Period endingParameterReportedLimitOver by
December 2025BOD, 5-day, 20 deg. C, maximum monthly average74.2 lb/d≤ 68 lb/d9%
December 2025BOD, 5-day, 20 deg. C, maximum monthly average74.2 lb/d≤ 68 lb/d9%
December 2025BOD, 5-day, 20 deg. C, maximum monthly average96 mg/L≤ 45 mg/L113%
December 2025BOD, 5-day, 20 deg. C, maximum monthly average96 mg/L≤ 45 mg/L113%
December 2025BOD, 5-day, 20 deg. C, maximum weekly average96 mg/L≤ 65 mg/L48%
December 2025BOD, 5-day, 20 deg. C, maximum weekly average96 mg/L≤ 65 mg/L48%
December 2025BOD, 5-day, percent removal, minimum53 %≥ 65 %34%
December 2025BOD, 5-day, percent removal, minimum53 %≥ 65 %34%
December 2025Flow, in conduit or thru treatment plant, maximum monthly average.242 MGD≤ .18 MGD34%
December 2025Flow, in conduit or thru treatment plant, maximum monthly average.242 MGD≤ .18 MGD34%
December 2025Solids, suspended percent removal, minimum-14 %≥ 65 %226%
December 2025Solids, suspended percent removal, minimum-14 %≥ 65 %226%
December 2025Solids, total suspended, maximum monthly average263 mg/L≤ 90 mg/L192%
December 2025Solids, total suspended, maximum monthly average263 mg/L≤ 90 mg/L192%
December 2025Solids, total suspended, maximum monthly average273.2 lb/d≤ 135 lb/d102%
December 2025Solids, total suspended, maximum monthly average273.2 lb/d≤ 135 lb/d102%
December 2025Solids, total suspended, maximum weekly average263 mg/L≤ 135 mg/L95%
December 2025Solids, total suspended, maximum weekly average263 mg/L≤ 135 mg/L95%
December 2025Solids, total suspended, maximum weekly average273.2 lb/d≤ 203 lb/d35%
December 2025Solids, total suspended, maximum weekly average273.2 lb/d≤ 203 lb/d35%

Limits in force (35)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 65 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 68 lb/dall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 98 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≤ 135 lb/dall year
Solids, total suspendedmaximum weekly average≤ 203 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
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≤ .18 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
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/MS0024678 · MCP: https://passage-data.com/mcp