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Sumrall Potw

Sewage treatment plant, Sumrall, Mississippi. NPDES permit MS0035955, in force until Apr 30, 2029. Last 12 months: over a limit 13 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
0 values over a limit, 0 required values missing, 0 of 1 report late

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

All 13 values over a limit
Period endingParameterReportedLimitOver by
December 2025BOD, 5-day, 20 deg. C, maximum monthly average17.3 lb/d≤ 17 lb/d2%
December 2025BOD, 5-day, 20 deg. C, maximum monthly average24 mg/L≤ 10 mg/L140%
December 2025BOD, 5-day, 20 deg. C, maximum weekly average24 mg/L≤ 15 mg/L60%
December 2025E. coli, maximum monthly average2420 #/100mL≤ 126 #/100mL1821%
December 2025E. coli, maximum weekly average2420 #/100mL≤ 410 #/100mL490%
December 2025Flow, in conduit or thru treatment plant, maximum monthly average.28 MGD≤ .2 MGD40%
December 2025Nitrogen, ammonia total [as N], maximum monthly average11.24 lb/d≤ 3 lb/d275%
December 2025Nitrogen, ammonia total [as N], maximum monthly average15.6 mg/L≤ 2 mg/L680%
December 2025Nitrogen, ammonia total [as N], maximum weekly average11.24 lb/d≤ 5 lb/d125%
December 2025Nitrogen, ammonia total [as N], maximum weekly average15.6 mg/L≤ 3 mg/L420%
December 2025Solids, total suspended, maximum monthly average52.5 lb/d≤ 50 lb/d5%
December 2025Solids, total suspended, maximum monthly average63 mg/L≤ 30 mg/L110%
December 2025Solids, total suspended, maximum weekly average63 mg/L≤ 45 mg/L40%

Limits in force (40)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 10 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 15 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 17 lb/dall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 25 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≤ 30 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall year
Solids, total suspendedmaximum monthly average≤ 50 lb/dall year
Solids, total suspendedmaximum weekly average≤ 75 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≤ 2 mg/Lall year
Nitrogen, ammonia total [as N]maximum weekly average≤ 3 mg/Lall year
Nitrogen, ammonia total [as N]maximum monthly average≤ 3 lb/dall year
Nitrogen, ammonia total [as N]maximum weekly average≤ 5 lb/dall year
Nitrogen, ammonia total [as N]maximum 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 monthly averagereport only (lb/d)all year
Nitrogen, ammonia 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≤ .2 MGDall year
Chlorine, total residualmaximum monthly average≤ .011 mg/Lall year
Chlorine, total residualmaximum weekly average≤ .019 mg/Lall year
E. colimaximum monthly average≤ 126 #/100mLall year
E. colimaximum weekly average≤ 410 #/100mLall year

New limits from May 6, 2027

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Nitrogen, ammonia total [as N], maximum monthly average2.3 lb/dtighter——
Nitrogen, ammonia total [as N], maximum monthly average1.37 mg/Ltighter——
Nitrogen, ammonia total [as N], maximum weekly average3.4 lb/dtighter——
Nitrogen, ammonia total [as N], maximum weekly average2.05 mg/Ltighter——

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/MS0035955 · MCP: https://passage-data.com/mcp