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(Unknown Permittee)

Sewerage Systems, Sumter, South Carolina. NPDES permit SC0030678 expired Jun 30, 2023; its limits still apply. Last 12 months: over a limit 2 times (last March 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 29 days after each period: form 1 monthly (25 values), form 2 quarterly (12 values), form 3 every 60 months
Last report on file
September 2026
Oct 2024 – Sep 2025
15 values over a limit, 37 required values missing, 3 of 16 reports late

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

Period endingParameterReportedLimitOver by
March 2026E. coli, daily maximum2419.6≤ 349 MPN/100mL593%
March 2026Nitrogen, ammonia total [as N], daily maximum2.2≤ 2.18 mg/L1%

Limits in force (43)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 15 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 20 lb/dall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 40 lb/dall year
pHminimum≥ 6 SUall year
pHmaximum≤ 8.5 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendeddaily maximum≤ 60 mg/Lall year
Solids, total suspendedmonthly average≤ 40 lb/dall year
Solids, total suspendeddaily maximum≤ 80.1 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 1.8 mg/LJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 1.09 mg/LMar–Oct
Nitrogen, ammonia total [as N]daily maximum≤ 3.6 mg/LJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 2.18 mg/LMar–Oct
Nitrogen, ammonia total [as N]monthly average≤ 2.4 lb/dJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 1.45 lb/dMar–Oct
Nitrogen, ammonia total [as N]daily maximum≤ 4.8 lb/dJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 2.91 lb/dMar–Oct
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (lb/d)all year
Phosphorus, total [as P]daily maximumreport only (lb/d)all year
Copper, total [as Cu]monthly average≤ .039 mg/Lall year
Copper, total [as Cu]daily maximum≤ .052 mg/Lall year
Copper, total [as Cu]monthly average≤ .052 lb/dall year
Copper, total [as Cu]daily maximum≤ .069 lb/dall year
Lead, total [as Pb]monthly average≤ .003 mg/Lall year
Lead, total [as Pb]daily maximum≤ .083 mg/Lall year
Lead, total [as Pb]monthly average≤ .004 lb/dall year
Lead, total [as Pb]daily maximum≤ .111 lb/dall year
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≤ .011 mg/Lall year
Chlorine, total residualdaily maximum≤ .019 mg/Lall year
Chlorine, total residualmonthly average≤ .0147 lb/dall year
Chlorine, total residualdaily maximum≤ .0254 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
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly average≤ 25 %all year
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiadaily maximum≤ 40 %all year

How strict are these limits?

Cited limits by parameter: South Carolina's rules and the federal ones.

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Your permit document is the final word. As JSON: /api/v1/permits/SC0030678 · MCP: https://passage-data.com/mcp