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Tega Cay City of

Sewerage Systems, Tega Cay, South Carolina. NPDES permit SC0026743 expired Jun 30, 2026; its limits still apply. Last 12 months: over a limit 2 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 29 days after each period: form 1 monthly (31 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 4 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimitOver by
August 2026E. coli, 30-day geometric mean2647≤ 126 MPN/100mL2001%
August 2026E. coli, daily maximum7700≤ 349 MPN/100mL2106%

Limits in force (35)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 2 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 80 lb/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 120 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≤ 80 lb/dall year
Solids, total suspendedweekly average≤ 120 lb/dall year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Jan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 15.3 mg/LMar–Oct
Nitrogen, ammonia total [as N]weekly averagereport only (mg/L)Jan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 30.6 mg/LMar–Oct
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)Jan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 41 lb/dMar–Oct
Nitrogen, ammonia total [as N]weekly averagereport only (lb/d)Jan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 62 lb/dMar–Oct
Phosphorus, total [as P]monthly average≤ .43 mg/Lall year
Phosphorus, total [as P]weekly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly average≤ .987 lb/dall year
Phosphorus, total [as P]weekly averagereport 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≤ .111 mg/Lall year
Chlorine, total residualdaily maximum≤ .192 mg/Lall year
Chlorine, total residualmonthly average≤ .3 lb/dall year
Chlorine, total residualdaily maximum≤ .51 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
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %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/SC0026743 · MCP: https://passage-data.com/mcp