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Senatobia Potw

Sewage treatment plant, major discharger, Senatobia, Mississippi. NPDES permit MS0052221, in force until Jun 30, 2027. Last 12 months: over a limit 34 times (last July 2026), 6 of 14 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (61 values), form Q quarterly (2 values)
Renewal application due
Jan 1, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
20 values over a limit, 0 required values missing, 1 of 16 reports late

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

All 34 values over a limit
Period endingParameterReportedLimitOver by
October 2025BOD, 5-day, 20 deg. C, monthly average< 8.5 mg/L≤ 6 mg/L42%
October 2025BOD, 5-day, 20 deg. C, maximum weekly average< 18 mg/L≤ 9 mg/L100%
October 2025Solids, suspended percent removal, minimum62 %≥ 85 %153%
October 2025Solids, total suspended, monthly average30.6 mg/L≤ 30 mg/L2%
November 2025BOD, 5-day, 20 deg. C, monthly average18.7 mg/L≤ 6 mg/L212%
November 2025BOD, 5-day, 20 deg. C, maximum weekly average34.3 mg/L≤ 9 mg/L281%
November 2025E. coli, monthly average1012 #/100mL≤ 126 #/100mL703%
November 2025E. coli, maximum weekly average11565 #/100mL≤ 410 #/100mL2721%
November 2025Nitrogen, ammonia total [as N], monthly average1.98 mg/L≤ 1.33 mg/L49%
November 2025Nitrogen, ammonia total [as N], maximum weekly average5.13 mg/L≤ 2 mg/L157%
November 2025Solids, suspended percent removal, minimum79 %≥ 85 %40%
November 2025Solids, total suspended, maximum weekly average53.4 mg/L≤ 45 mg/L19%
December 2025BOD, 5-day, 20 deg. C, monthly average9 mg/L≤ 6 mg/L50%
December 2025BOD, 5-day, 20 deg. C, maximum weekly average14.3 mg/L≤ 9 mg/L59%
December 2025E. coli, monthly average2258 #/100mL≤ 126 #/100mL1692%
December 2025E. coli, maximum weekly average8082 #/100mL≤ 410 #/100mL1871%
December 2025Nitrogen, ammonia total [as N], monthly average< 1.95 mg/L≤ 1.33 mg/L47%
December 2025Nitrogen, ammonia total [as N], maximum weekly average< 5.65 mg/L≤ 2 mg/L182%
December 2025Solids, suspended percent removal, minimum82 %≥ 85 %20%
January 2026BOD, 5-day, 20 deg. C, monthly average12.9 mg/L≤ 6 mg/L115%
January 2026BOD, 5-day, 20 deg. C, maximum weekly average34 mg/L≤ 9 mg/L278%
January 2026E. coli, monthly average5382 #/100mL≤ 126 #/100mL4171%
January 2026E. coli, maximum weekly average10000 #/100mL≤ 410 #/100mL2339%
January 2026Nitrogen, ammonia total [as N], maximum weekly average2.36 mg/L≤ 2 mg/L18%
February 2026E. coli, monthly average> 2107 #/100mL≤ 126 #/100mL—
February 2026E. coli, maximum weekly average> 11149 #/100mL≤ 410 #/100mL—
February 2026Nitrogen, ammonia total [as N], monthly average< 2.12 mg/L≤ 1.33 mg/L59%
February 2026Nitrogen, ammonia total [as N], maximum weekly average< 7.49 mg/L≤ 2 mg/L274%
February 2026Nitrogen, ammonia total [as N], maximum weekly average< 75.3 lb/d≤ 50 lb/d51%
March 2026E. coli, monthly average3262 #/100mL≤ 126 #/100mL2489%
March 2026E. coli, maximum weekly average4579 #/100mL≤ 410 #/100mL1017%
May 2026Solids, suspended percent removal, minimum84 %≥ 85 %7%
June 2026Solids, suspended percent removal, minimum84 %≥ 85 %7%
July 2026Solids, suspended percent removal, minimum84 %≥ 85 %7%

Limits in force (92)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
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. Cmonthly average≤ 14 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 6 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 21 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 9 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 234 lb/dall year
BOD, 5-day, 20 deg. Cmonthly average≤ 150 lb/dall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 350 lb/dall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 225 lb/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all 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. 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. Cmonthly averagereport only (lb/d)all year
BOD, 5-day, 20 deg. Cmaximum weekly 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≤ 30 mg/Lall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 500 lb/dall year
Solids, total suspendedmonthly average≤ 750 lb/dall year
Solids, total suspendedmaximum weekly average≤ 750 lb/dall year
Solids, total suspendedmaximum weekly average≤ 1126 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedmaximum weekly 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 suspendedmonthly averagereport only (lb/d)all year
Solids, total suspendedmaximum weekly 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 averagereport only (lb/d)all year
Nitrogen, total [as N]maximum 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 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≤ 2 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 1.33 mg/Lall year
Nitrogen, ammonia total [as N]maximum weekly average≤ 3 mg/Lall year
Nitrogen, ammonia total [as N]maximum weekly average≤ 2 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 33 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 33 lb/dall year
Nitrogen, ammonia total [as N]maximum weekly average≤ 50 lb/dall year
Nitrogen, ammonia total [as N]maximum weekly average≤ 50 lb/dall year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
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]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]monthly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]maximum weekly 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 averagereport only (lb/d)all year
Phosphorus, total [as P]maximum weekly averagereport only (lb/d)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]maximum monthly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (lb/d)all year
Phosphorus, total [as P]maximum monthly averagereport only (lb/d)all year
Zinc, total recoverablemonthly averagereport only (mg/L)all year
Zinc, total recoverablemaximum weekly averagereport only (mg/L)all year
Zinc, total recoverablemonthly averagereport only (lb/d)all year
Zinc, total recoverablemaximum weekly averagereport only (lb/d)all year
Copper, total recoverablemonthly averagereport only (mg/L)all year
Copper, total recoverablemaximum weekly averagereport only (mg/L)all year
Copper, total recoverablemonthly averagereport only (lb/d)all year
Copper, total recoverablemaximum weekly averagereport only (lb/d)all year
Flow, in conduit or thru treatment plantmonthly average≤ 2 MGDall year
Flow, in conduit or thru treatment plantmonthly average≤ 3 MGDall year
Flow, in conduit or thru treatment plantmaximum weekly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantmaximum weekly averagereport only (MGD)all year
E. colimonthly average≤ 126 #/100mLall year
E. colimonthly average≤ 126 #/100mLall year
E. colimaximum weekly average≤ 410 #/100mLall year
E. colimaximum weekly average≤ 410 #/100mLall year
BOD, 5-day, percent removalminimum≥ 85 %all year
Solids, suspended percent removalminimum≥ 85 %all year
Sludge settleability 30 minuteminimumreport only (mL/L)all year
Sludge settleability 30 minutemaximumreport only (mL/L)all year
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimumreport only (%)all year
%Effect Static Renewal 7Day Chronic Pimephales promelasminimumreport only (%)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/MS0052221 · MCP: https://passage-data.com/mcp