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Richton Potw

Sewage treatment plant, Richton, Mississippi. NPDES permit MS0024686, in force until Jul 31, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form Q quarterly (45 values)
Renewal application due
Feb 1, 2027 · 180 days before expiry; your permit may set another date
Last report on file
June 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 1 of 4 reports late

Limits in force (49)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 15 mg/LMay–Oct
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 22.5 mg/LMay–Oct
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 45 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 41 lb/dMay–Oct
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 83 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 62 lb/dMay–Oct
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 124 lb/dJan, Feb, Mar, Apr, Nov, Dec
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≤ 30 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall year
Solids, total suspendedmaximum monthly average≤ 83 lb/dall year
Solids, total suspendedmaximum weekly average≤ 124 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
Nitrogen, ammonia total [as N]maximum monthly average≤ 10 mg/Lall year
Nitrogen, ammonia total [as N]maximum weekly average≤ 15 mg/Lall year
Nitrogen, ammonia total [as N]maximum monthly average≤ 27.5 lb/dall year
Nitrogen, ammonia total [as N]maximum weekly average≤ 41 lb/dall 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
Chromium, hexavalent [as Cr]maximum monthly average≤ .09 mg/Lall year
Chromium, hexavalent [as Cr]maximum weekly average≤ .13 mg/Lall year
Zinc, total [as Zn]maximum monthly average≤ .53 mg/Lall year
Zinc, total [as Zn]maximum weekly average≤ .53 mg/Lall year
Flow, in conduit or thru treatment plantmaximum monthly average≤ .33 MGDall year
Flow, in conduit or thru treatment plantmaximum weekly averagereport only (MGD)all year
Chlorine, total residualmaximum monthly average≤ .089 mg/Lall year
Chlorine, total residualmaximum weekly average≤ .19 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
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum≥ 12.43 %all year
%Effect Static Renewal 7Day Chronic Pimephales promelasminimum≥ 12.43 %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/MS0024686 · MCP: https://passage-data.com/mcp