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Grenada Potw

Sewage treatment plant, major discharger, Grenada, Mississippi. NPDES permit MS0020397, in force until May 31, 2031. Last 12 months: over a limit 6 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form N monthly (43 values), form Q quarterly
Last report on file
August 2026
Oct 2024 – Sep 2025
10 values over a limit, 0 required values missing, 3 of 16 reports late

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

Period endingParameterReportedLimitOver by
March 2026E. coli, monthly average1211 #/100mL≤ 126 #/100mL861%
March 2026E. coli, maximum weekly average2420 #/100mL≤ 410 #/100mL490%
April 2026E. coli, monthly average173 #/100mL≤ 126 #/100mL37%
April 2026E. coli, maximum weekly average488 #/100mL≤ 410 #/100mL19%
June 2026E. coli, monthly average682 #/100mL≤ 126 #/100mL441%
June 2026E. coli, maximum weekly average1120 #/100mL≤ 410 #/100mL173%

Limits in force (57)

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 average≤ 850 lb/dall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 1276 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 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 suspendedmonthly average≤ 90 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 135 mg/Lall year
Solids, total suspendedmonthly average≤ 2552 lb/dall year
Solids, total suspendedmaximum weekly average≤ 3828 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 averagereport only (lb/d)all year
Solids, total suspendedmaximum weekly averagereport only (lb/d)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]monthly average≤ 326.3 lb/dall year
Nitrogen, total [as N]maximum weekly average≤ 489.5 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]monthly averagereport only (lb/d)all year
Nitrogen, total [as N]maximum weekly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]monthly average≤ 14 mg/LMay–Nov
Nitrogen, ammonia total [as N]monthly average≤ 19 mg/LJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]maximum weekly average≤ 21 mg/LMay–Nov
Nitrogen, ammonia total [as N]maximum weekly average≤ 28 mg/LJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]monthly average≤ 397 lb/dMay–Nov
Nitrogen, ammonia total [as N]monthly average≤ 539 lb/dJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]maximum weekly average≤ 595 lb/dMay–Nov
Nitrogen, ammonia total [as N]maximum weekly average≤ 794 lb/dJan, Feb, Mar, Apr, Dec
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 averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]maximum weekly averagereport only (lb/d)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]monthly average≤ 147.5 lb/dall year
Phosphorus, total [as P]maximum weekly average≤ 221.3 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]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 plantmonthly average≤ 3.4 MGDall year
Flow, in conduit or thru treatment plantmaximum weekly averagereport only (MGD)all year
Chlorine, total residualmonthly average≤ .13 mg/Lall year
Chlorine, total residualmaximum weekly average≤ .22 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≥ 8.73 %all year
%Effect Static Renewal 7Day Chronic Pimephales promelasminimum≥ 8.73 %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/MS0020397 · MCP: https://passage-data.com/mcp