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Pickens County Public Service Commission

Sewage treatment plant, major discharger, Liberty, South Carolina. NPDES permit SC0042994 expired Aug 31, 2024; its limits still apply. Last 12 months: over a limit 5 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 29 days after each period: form 1 monthly (43 values), form 4 quarterly, form 5 yearly
Last report on file
August 2026
Oct 2024 – Sep 2025
13 values over a limit, 0 required values missing, 1 of 17 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
March 2026Nitrogen, ammonia total [as N], monthly average< 1.99≤ 1.5 mg/L33%
March 2026Nitrogen, ammonia total [as N], weekly average5.25≤ 2.3 mg/L128%
April 2026BOD, 5-day, 20 deg. C, weekly average18.8≤ 15 mg/L25%
August 2026E. coli, daily maximum24196≤ 349 MPN/100mL6833%
August 2026Nitrogen, ammonia total [as N], monthly average3.26≤ 1.5 mg/L117%

Limits in force (53)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 5 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≤ 70 lb/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 108 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≤ 250 lb/dall year
Solids, total suspendedweekly average≤ 375 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≤ 1.5 mg/LMar–Oct
Nitrogen, ammonia total [as N]monthly average≤ 3 mg/LJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 2.3 mg/LMar–Oct
Nitrogen, ammonia total [as N]weekly average≤ 4.5 mg/LJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 13 lb/dMar–Oct
Nitrogen, ammonia total [as N]monthly average≤ 25 lb/dJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 19 lb/dMar–Oct
Nitrogen, ammonia total [as N]weekly average≤ 38 lb/dJan, Feb, Nov, Dec
Phosphorus, total [as P]monthly average≤ 1 mg/Lall year
Phosphorus, total [as P]weekly average≤ 1.5 mg/Lall year
Phosphorus, total [as P]monthly average≤ 8.3 lb/dall year
Phosphorus, total [as P]weekly average≤ 12.5 lb/dall year
Copper, total [as Cu]monthly average≤ .021 mg/Lall year
Copper, total [as Cu]daily maximum≤ .028 mg/Lall year
Copper, total [as Cu]monthly average≤ .18 lb/dall year
Copper, total [as Cu]daily maximum≤ .23 lb/dall 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 plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year
Chlorine, total residualmonthly average≤ .024 mg/Lall year
Chlorine, total residualdaily maximum≤ .042 mg/Lall year
Chlorine, total residualmonthly average≤ .2 lb/dall year
Chlorine, total residualdaily maximum≤ .35 lb/dall 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
Mercury, total [as Hg]monthly average≤ .00011 ng/Lall year
Mercury, total [as Hg]daily maximum≤ .00016 ng/Lall year
Mercury, total [as Hg]monthly average≤ .00092 lb/dall year
Mercury, total [as Hg]daily maximum≤ .0013 lb/dall 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 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.

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/SC0042994 · MCP: https://passage-data.com/mcp