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(Unknown Permittee)

Sewerage Systems, Sumter, South Carolina. NPDES permit SC0030724 expired Jul 31, 2021; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 29 days after each period: form 1 monthly (25 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 14 required values missing, 2 of 12 reports late

Limits in force (29)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 20 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 9 lb/dall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 18 lb/dall year
pHminimum≥ 6 SUall year
pHmaximum≤ 8.5 SUall year
Solids, total suspendedmonthly average≤ 90 mg/Lall year
Solids, total suspendeddaily maximum≤ 180 mg/Lall year
Solids, total suspendedmonthly average≤ 78 lb/dall year
Solids, total suspendeddaily maximum≤ 156 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/LJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 1 mg/LMar–Oct
Nitrogen, ammonia total [as N]daily maximum≤ 4 mg/LJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 2 mg/LMar–Oct
Nitrogen, ammonia total [as N]monthly average≤ 2 lb/dJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 1 lb/dMar–Oct
Nitrogen, ammonia total [as N]daily maximum≤ 4 lb/dJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 2 lb/dMar–Oct
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualmonthly average≤ .1 mg/Lall year
Chlorine, total residualdaily maximum≤ .13 mg/Lall year
Chlorine, total residualmonthly average≤ .09 lb/dall year
Chlorine, total residualdaily maximum≤ .11 lb/dall year
E. coli30-day geometric mean≤ 126 MPN/100mLall year
E. colidaily maximum≤ 349 MPN/100mLall year
E. coli30-day geometric mean≤ 126 MPN/100mLall year
E. colidaily maximum≤ 800 MPN/100mLall year

How strict are these limits?

Cited limits by parameter: South Carolina'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/SC0030724 · MCP: https://passage-data.com/mcp