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Berkeley County Water & Sanitation Authority

Sewage treatment plant, major discharger, Goose Creek, South Carolina. NPDES permit SC0046060 expired Apr 30, 2024; 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 (29 values), form 2 quarterly, form 3 yearly, form 4 yearly
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 18 reports late

Limits in force (49)

ParameterStatisticLimitMonths
Oxygen demand, ultimatemonthly average≤ 19350 lb/dJan, Feb, Nov, Dec
Oxygen demand, ultimatemonthly average≤ 8846 lb/dMar–Oct
Oxygen demand, ultimateweekly average≤ 29026 lb/dJan, Feb, Nov, Dec
Oxygen demand, ultimateweekly averagereport only (lb/d)Mar–Oct
Oxygen, dissolved [DO]minimum≥ 5 mg/Lall 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≤ 4500 lb/dall year
Solids, total suspendedweekly average≤ 6750 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≤ 11.2 mg/LMar–Oct
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Jan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 16.8 mg/LMar–Oct
Nitrogen, ammonia total [as N]weekly averagereport only (mg/L)Jan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 1680 lb/dMar–Oct
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)Jan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 2520 lb/dMar–Oct
Nitrogen, ammonia total [as N]weekly averagereport only (lb/d)Jan, Feb, Nov, Dec
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≤ .5 mg/Lall year
Chlorine, total residualdaily maximum≤ 1 mg/Lall year
Chlorine, total residualmonthly average≤ 75 lb/dall year
Chlorine, total residualdaily maximum≤ 150 lb/dall year
Enterococci30-day geometric mean≤ 35 MPN/100mLall year
Enterococcidaily maximum≤ 501 MPN/100mLall year
Enterococci30-day geometric mean≤ 35 MPN/100mLall year
Enterococcidaily maximum≤ 800 MPN/100mLall year
Mercury, total [as Hg]monthly averagereport only (ng/L)all year
Mercury, total [as Hg]daily maximumreport only (ng/L)all year
Mercury, total [as Hg]monthly averagereport only (lb/d)all year
Mercury, total [as Hg]daily maximumreport only (lb/d)all year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/LJan, Feb, Nov, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 15.4 mg/LMar–Oct
BOD, carbonaceous [5 day, 20 C]weekly average≤ 37.5 mg/LJan, Feb, Nov, Dec
BOD, carbonaceous [5 day, 20 C]weekly average≤ 23.1 mg/LMar–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 3750 lb/dJan, Feb, Nov, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 2310 lb/dMar–Oct
BOD, carbonaceous [5 day, 20 C]weekly average≤ 5630 lb/dJan, Feb, Nov, Dec
BOD, carbonaceous [5 day, 20 C]weekly average≤ 3470 lb/dMar–Oct
Solids, suspended percent removalmonthly average minimum≥ 85 %all year
Carbonaceous oxygen demand, % removalmonthly average minimum≥ 85 %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

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/SC0046060 · MCP: https://passage-data.com/mcp