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Renewable Water Resources

Sewage treatment plant, major discharger, Simpsonville, South Carolina. NPDES permit SC0024261 expired Sep 30, 2007; 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 (27 values), form 2 quarterly (2 values), form 3 monthly (8 values), form 4 quarterly (6 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 32 reports late

Limits in force (47)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 15 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 22.5 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 1439 lb/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 2159 lb/dall year
pHminimum≥ 6 SUall year
pHmaximum≤ 8.5 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 2877 lb/dall year
Solids, total suspendedweekly average≤ 4316 lb/dall year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]monthly average≤ 2.76 mg/LMar–Oct
Nitrogen, ammonia total [as N]monthly average≤ 7.4 mg/LJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 4.14 mg/LMar–Oct
Nitrogen, ammonia total [as N]weekly average≤ 11.1 mg/LJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 265 lb/dMar–Oct
Nitrogen, ammonia total [as N]monthly average≤ 710 lb/dJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 398 lb/dMar–Oct
Nitrogen, ammonia total [as N]weekly average≤ 1065 lb/dJan, Feb, Nov, Dec
Phosphorus, total [as P]monthly average≤ 2 mg/Lall year
Phosphorus, total [as P]monthly average≤ 3500 lb/dall year
Phosphorus, total [as P]monthly average≤ 30700 lb/dall year
Phosphorus, total [as P]average≤ 114610 lb/dall year
Hardness, total [as CaCO3]monthly averagereport only (mg/L)all year
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year
Dichlorobromomethanemonthly average≤ .0041 mg/Lall year
Dibromochloromethanemonthly average≤ .003 mg/Lall year
Flow, in conduit or thru treatment plantmonthly average≤ 11.5 MGDall year
Flow, in conduit or thru treatment plantweekly average≤ 14.9 MGDall year
Chlorine, total residualmonthly averagereport only (mg/L)all year
Chlorine, total residualdaily maximumreport only (mg/L)all year
Chlorine, total residualmonthly averagereport only (mg/L)all year
Chlorine, total residualdaily maximumreport only (mg/L)all year
Chlorine, total residualmonthly average≤ .024 mg/Lall year
Chlorine, total residualdaily maximum≤ .042 mg/Lall year
Chlorine, total residualmonthly averagereport only (mg/L)all year
Chlorine, total residualdaily maximumreport only (mg/L)all year
Coliform, fecal general30-day geometric mean≤ 200 #/100mLall year
Coliform, fecal generaldaily maximum≤ 400 #/100mLall year
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaquarterly average≤ 25 %all year
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiadaily maximum≤ 40 %all year
%Mortality 7Day Chronic Ceriodaphnia dubiaquarterly averagereport only (%)all year
%Mortality 7Day Chronic Ceriodaphnia dubiadaily maximumreport only (%)all year
%Repro Reduc Static Renewal7D Chronic Ceriodaphnia dubiaquarterly averagereport only (%)all year
%Repro Reduc Static Renewal7D Chronic Ceriodaphnia dubiadaily maximumreport only (%)all 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/SC0024261 · MCP: https://passage-data.com/mcp