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Lowcountry Regional Water System

Sewage treatment plant, Brunson, South Carolina. NPDES permit SC0042382 expired Sep 30, 2019; 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), form 3 yearly (2 values), form 4 monthly (4 values), form 2 quarterly
Last report on file
September 2026
Oct 2024 – Sep 2025
80 values over a limit, 0 required values missing, 0 of 29 reports late

Limits in force (56)

ParameterStatisticLimitMonths
Streamflowminimum≥ 4.25 cfsMar–Oct
Streamflowminimum≥ .28 cfsJan, Feb, Nov, Dec
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 15 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 9.2 lb/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 13.8 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≤ 27.5 lb/dall year
Solids, total suspendedweekly average≤ 41.3 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 1 mg/Lall year
Nitrogen, ammonia total [as N]weekly average≤ 1.5 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ .92 lb/dall year
Nitrogen, ammonia total [as N]weekly average≤ 1.38 lb/dall year
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
Cadmium, total [as Cd]monthly averagereport only (mg/L)all year
Cadmium, total [as Cd]daily maximumreport only (mg/L)all year
Cadmium, total [as Cd]monthly averagereport only (lb/d)all year
Cadmium, total [as Cd]daily maximumreport only (lb/d)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
Lead, total [as Pb]monthly averagereport only (mg/L)all year
Lead, total [as Pb]daily maximumreport only (mg/L)all year
Lead, total [as Pb]monthly averagereport only (lb/d)all year
Lead, total [as Pb]daily maximumreport only (lb/d)all year
Zinc, total [as Zn]monthly averagereport only (mg/L)all year
Zinc, total [as Zn]daily maximumreport only (mg/L)all year
Zinc, total [as Zn]monthly averagereport only (lb/d)all year
Zinc, total [as Zn]daily maximumreport only (lb/d)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all 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≤ .286 mg/LMar–Oct
Chlorine, total residualmonthly average≤ .029 mg/LJan, Feb, Nov, Dec
Chlorine, total residualdaily maximum≤ .493 mg/LMar–Oct
Chlorine, total residualdaily maximum≤ .05 mg/LJan, Feb, Nov, Dec
Chlorine, total residualmonthly average≤ .26 lb/dMar–Oct
Chlorine, total residualmonthly average≤ .03 lb/dJan, Feb, Nov, Dec
Chlorine, total residualdaily maximum≤ .45 lb/dMar–Oct
Chlorine, total residualdaily maximum≤ .05 lb/dJan, Feb, Nov, Dec
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
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly averagereport only (%)all year
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiadaily maximumreport only (%)all year

How strict are these limits?

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

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/SC0042382 · MCP: https://passage-data.com/mcp