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Mark King

Sewerage Systems, Holly Hill, South Carolina. NPDES permit SC0049374, in force until Apr 30, 2031. 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 (21 values), form 3 yearly
Last report on file
August 2026

Limits in force (29)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 7 mg/Lall 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≤ 30 lb/dall year
Solids, total suspendeddaily maximum≤ 50 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 1 mg/LMar–Oct
Nitrogen, ammonia total [as N]monthly average≤ 4.3 mg/LJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 2 mg/LMar–Oct
Nitrogen, ammonia total [as N]daily maximum≤ 8.6 mg/LJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ .8 lb/dMar–Oct
Nitrogen, ammonia total [as N]monthly average≤ 3.6 lb/dJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 1.6 lb/dMar–Oct
Nitrogen, ammonia total [as N]daily maximum≤ 7.2 lb/dJan, 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
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, carbonaceous [5 day, 20 C]monthly average≤ 5.5 mg/Lall year
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 11 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 4.6 lb/dall year
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 9.2 lb/dall year
LC50 Static 48Hr Acute Ceriodaphnia dubiadaily minimumreport only (%)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
IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiadaily minimumreport 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/SC0049374 · MCP: https://passage-data.com/mcp