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Shaw Potw

Sewage treatment plant, Shaw, Mississippi. NPDES permit MS0024953, in force until Jun 30, 2031. Last 12 months: over a limit 7 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
3 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 average41 mg/L≤ 30 mg/L37%
December 2025BOD, 5-day, percent removal, minimum58 %≥ 65 %20%
December 2025E. coli, daily maximum2420 #/100mL≤ 410 #/100mL490%
December 2025E. coli, maximum monthly average2420 #/100mL≤ 126 #/100mL1821%
December 2025Nitrogen, ammonia total [as N], daily maximum5.65 mg/L≤ 3.72 mg/L52%
December 2025Nitrogen, ammonia total [as N], maximum monthly average5.65 mg/L≤ 2.48 mg/L128%
December 2025Nitrogen, ammonia total [as N], maximum monthly average9.42 lb/d≤ 7.5 lb/d26%

Limits in force (37)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 90 lb/dall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 135 lb/dall year
BOD, 5-day, 20 deg. Cmaximum monthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year
BOD, 5-day, 20 deg. Cmaximum monthly averagereport only (lb/d)all year
BOD, 5-day, 20 deg. Cdaily maximumreport only (lb/d)all year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmaximum monthly average≤ 90 mg/Lall year
Solids, total suspendeddaily maximum≤ 135 mg/Lall year
Solids, total suspendedmaximum monthly average≤ 270 lb/dall year
Solids, total suspendeddaily maximum≤ 405 lb/dall year
Solids, total suspendedmaximum monthly averagereport only (mg/L)all year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Solids, total suspendedmaximum monthly averagereport only (lb/d)all year
Solids, total suspendeddaily maximumreport only (lb/d)all year
Nitrogen, total [as N]maximum monthly average≤ 34.5 lb/dall year
Nitrogen, total [as N]daily maximum≤ 69 lb/dall year
Nitrogen, ammonia total [as N]maximum monthly average≤ 2.48 mg/Lall year
Nitrogen, ammonia total [as N]daily maximum≤ 3.72 mg/Lall year
Nitrogen, ammonia total [as N]maximum monthly average≤ 7.5 lb/dall year
Nitrogen, ammonia total [as N]daily maximum≤ 11.2 lb/dall year
Phosphorus, total [as P]maximum monthly average≤ 15.6 lb/dall year
Phosphorus, total [as P]daily maximum≤ 31.2 lb/dall year
Flow, in conduit or thru treatment plantmaximum monthly average≤ .36 MGDall year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualmaximum monthly average≤ .011 mg/Lall year
Chlorine, total residualdaily maximum≤ .019 mg/Lall year
Chlorine, total residualmaximum monthly average≤ .03 lb/dall year
Chlorine, total residualdaily maximum≤ .06 lb/dall year
E. colimaximum monthly average≤ 126 #/100mLall year
E. colidaily 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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Your permit document is the final word. As JSON: /api/v1/permits/MS0024953 · MCP: https://passage-data.com/mcp