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Sebastopol Water Association

Sewerage Systems, Sebastopol, Mississippi. NPDES permit MS0026727, in force until Aug 31, 2029. Last 12 months: over a limit once (last December 2025). 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, 1 of 1 report late

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

Period endingParameterReportedLimitOver by
December 2025Flow, in conduit or thru treatment plant, maximum monthly average.0958 MGD≤ .075 MGD28%

Limits in force (29)

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≤ 19 lb/dall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 28 lb/dall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmaximum monthly average≤ 90 mg/Lall year
Solids, total suspendeddaily maximum≤ 90 mg/Lall year
Solids, total suspendedmaximum monthly average≤ 56 lb/dall year
Solids, total suspendeddaily maximum≤ 56 lb/dall year
Nitrogen, total [as N]maximum monthly averagereport only (mg/L)all year
Nitrogen, total [as N]daily maximumreport only (mg/L)all year
Nitrogen, total [as N]maximum monthly average≤ 7.2 lb/dall year
Nitrogen, total [as N]daily maximum≤ 10.8 lb/dall year
Nitrogen, ammonia total [as N]maximum monthly average≤ 3 mg/Lall year
Nitrogen, ammonia total [as N]daily maximum≤ 4.5 mg/Lall year
Nitrogen, ammonia total [as N]maximum monthly average≤ 1.88 lb/dall year
Nitrogen, ammonia total [as N]daily maximum≤ 2.81 lb/dall year
Phosphorus, total [as P]maximum monthly averagereport only (mg/L)all year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]maximum monthly average≤ 3.25 lb/dall year
Phosphorus, total [as P]daily maximum≤ 4.9 lb/dall year
Flow, in conduit or thru treatment plantmaximum monthly average≤ .075 MGDall year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualmaximum monthly average≤ .02 mg/Lall year
Chlorine, total residualdaily maximum≤ .03 mg/Lall year
E. colimaximum monthly average≤ 126 #/100mLall year
E. colidaily maximum≤ 410 #/100mLall year

New limits from Sep 23, 2027

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Nitrogen, ammonia total [as N], daily maximum1.9 lb/dtighter——
Nitrogen, ammonia total [as N], daily maximum3 mg/Ltighter——
Nitrogen, ammonia total [as N], maximum monthly average1.3 lb/dtighter——
Nitrogen, ammonia total [as N], maximum monthly average2 mg/Ltighter——

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/MS0026727 · MCP: https://passage-data.com/mcp