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Lyman Town of

Sewage treatment plant, major discharger, Lyman, South Carolina. NPDES permit SC0021300, in force until Jan 31, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 29 days after each period: form 1A monthly (49 values), form 4 monthly (4 values), form 2A quarterly
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 28 reports late

Limits in force (61)

ParameterStatisticLimitMonths
Hydrogen peroxidedaily maximumreport only (mg/L)all year
Hydrogen peroxidedaily maximumreport only (lb/d)all year
Oxygen, dissolved [DO]minimum= 6 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average= 21.4 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average= 32.1 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average= 803 lb/dall year
BOD, 5-day, 20 deg. Cweekly average= 1205 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= 1126 lb/dall year
Solids, total suspendedweekly average= 1689 lb/dall year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]weekly averagereport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (lb/d)all year
Nitrogen, total [as N]weekly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]monthly average= 4.29 mg/LJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]monthly average= 2 mg/LMar–Oct
Nitrogen, ammonia total [as N]weekly average= 6.44 mg/LJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]weekly average= 3 mg/LMar–Oct
Nitrogen, ammonia total [as N]monthly average= 161 lb/dJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]monthly average= 75 lb/dMar–Oct
Nitrogen, ammonia total [as N]weekly average= 242 lb/dJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]weekly average= 113 lb/dMar–Oct
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]weekly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (lb/d)all year
Phosphorus, total [as P]weekly averagereport only (lb/d)all year
Hardness, total [as CaCO3]monthly averagereport only (mg/L)all year
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year
Copper, total [as Cu]monthly averagereport only (mg/L)all year
Copper, total [as Cu]daily maximumreport only (mg/L)all year
Copper, total [as Cu]monthly averagereport only (lb/d)all year
Copper, total [as Cu]daily maximumreport only (lb/d)all year
Bis[chloromethyl] ethermonthly average= .00092 mg/Lall year
Bis[chloromethyl] etherdaily maximum= .0013 mg/Lall year
Bis[chloromethyl] ethermonthly average= .035 lb/dall year
Bis[chloromethyl] etherdaily maximum= .049 lb/dall year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year
Chlorine, total residualmonthly average= .021 mg/Lall year
Chlorine, total residualdaily maximum= .036 mg/Lall year
Chlorine, total residualmonthly average= .79 lb/dall year
Chlorine, total residualdaily maximum= 1.35 lb/dall year
E. colimonthly average≤ 126 MPN/100mLall year
E. colidaily maximum≤ 349 MPN/100mLall year
E. colimonthly average≤ 126 MPN/100mLall year
E. colidaily maximum≤ 800 MPN/100mLall year
Peracetic Aciddaily maximum= 1 mg/Lall year
Peracetic Aciddaily maximum= 37.53 lb/dall year
Chemical oxygen demand [COD]monthly averagereport only (mg/L)all year
Chemical oxygen demand [COD]weekly averagereport only (mg/L)all year
Chemical oxygen demand [COD]monthly averagereport only (lb/d)all year
Chemical oxygen demand [COD]weekly averagereport only (lb/d)all year
BOD, 5-day, percent removalmonthly average minimum= 85 %all year
Solids, suspended percent removalmonthly average minimum= 85 %all year
LC50 Static 48Hr Acute Ceriodaphnia dubiadaily minimumreport only (%)all 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
IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiadaily minimumreport only (%)all year

New limits from Dec 1, 2028

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Bis[chloromethyl] ether, daily maximum0.001 mg/Ltighter0 mg/L (11 values)0×
Bis[chloromethyl] ether, monthly average0.0007 mg/Ltighter0 mg/L (11 values)0×
Chlorine, total residual, daily maximum0.032 mg/Ltighter0 mg/L (10 values)0×
Chlorine, total residual, monthly average0.018 mg/Ltighter0 mg/L (10 values)0×

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/SC0021300 · MCP: https://passage-data.com/mcp