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Coosawhatchie Land Co

Gasoline Service Stations, Cooswhatchie, South Carolina. NPDES permit SC0035394 expired Apr 30, 2020; its limits still apply. Last 12 months: over a limit 10 times (last December 2025). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 29 days after each period: form 1 monthly (29 values), form 2 quarterly
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 1 of 16 reports late

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

Period endingParameterReportedLimitOver by
October 2025Coliform, fecal general, daily maximum49.6≤ 43 MPN/100mL15%
October 2025Copper, total [as Cu], daily maximum.0256≤ .0003 lb/d8433%
October 2025Copper, total [as Cu], daily maximum7.9≤ .013 mg/L60669%
October 2025Copper, total [as Cu], monthly average.0256≤ .0003 lb/d8433%
October 2025Copper, total [as Cu], monthly average7.9≤ .01 mg/L78900%
October 2025Oxygen, dissolved [DO], minimum2.22≥ 4 mg/L45%
December 2025Chlorine, total residual, daily maximum.09≤ .019 mg/L374%
December 2025Chlorine, total residual, daily maximum.3≤ .0005 lb/d59900%
December 2025Chlorine, total residual, monthly average.09≤ .011 mg/L718%
December 2025Chlorine, total residual, monthly average.3≤ .0003 lb/d99900%

Limits in force (45)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 4 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 15 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ .38 lb/dall year
BOD, 5-day, 20 deg. Cdaily maximum≤ .76 lb/dall 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≤ 1 lb/dall year
Solids, total suspendeddaily maximum≤ 2 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 1.72 mg/LMar–Oct
Nitrogen, ammonia total [as N]monthly average≤ 3.72 mg/LJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 3.44 mg/LMar–Oct
Nitrogen, ammonia total [as N]daily maximum≤ 7.44 mg/LJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ .04 lb/dMar–Oct
Nitrogen, ammonia total [as N]monthly average≤ .09 lb/dJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ .08 lb/dMar–Oct
Nitrogen, ammonia total [as N]daily maximum≤ .18 lb/dJan, Feb, Nov, Dec
Nitrogen, nitrate total [as N]monthly averagereport only (mg/L)all year
Nitrogen, nitrate total [as N]daily maximumreport only (mg/L)all year
Nitrogen, nitrate total [as N]monthly averagereport only (lb/d)all year
Nitrogen, nitrate total [as N]daily maximumreport only (lb/d)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (lb/d)all year
Phosphorus, total [as P]daily maximumreport only (lb/d)all year
Copper, total [as Cu]monthly average≤ .01 mg/Lall year
Copper, total [as Cu]daily maximum≤ .013 mg/Lall year
Copper, total [as Cu]monthly average≤ .0003 lb/dall year
Copper, total [as Cu]daily maximum≤ .0003 lb/dall year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualmonthly average≤ .011 mg/Lall year
Chlorine, total residualdaily maximum≤ .019 mg/Lall year
Chlorine, total residualmonthly average≤ .0003 lb/dall year
Chlorine, total residualdaily maximum≤ .0005 lb/dall year
Enterococci30-day geometric mean≤ 35 MPN/100mLall year
Enterococcidaily maximum≤ 104 MPN/100mLall year
Enterococci30-day geometric mean≤ 35 MPN/100mLall year
Enterococcidaily maximum≤ 800 MPN/100mLall year
Coliform, fecal general30-day geometric mean≤ 14 MPN/100mLall year
Coliform, fecal generaldaily maximum≤ 43 MPN/100mLall year
Coliform, fecal general30-day geometric mean≤ 14 MPN/100mLall year
Coliform, fecal generaldaily maximum≤ 200 MPN/100mLall 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/SC0035394 · MCP: https://passage-data.com/mcp