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Inman City of

Sewage treatment plant, major discharger, Inman, South Carolina. NPDES permit SC0021601 expired Aug 31, 2019; its limits still apply. Last 12 months: over a limit 15 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 29 days after each period: form 1 monthly (43 values), form 2 quarterly
Last report on file
August 2026
Oct 2024 – Sep 2025
14 values over a limit, 0 required values missing, 0 of 16 reports late

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

All 15 values over a limit
Period endingParameterReportedLimitOver by
October 2025BOD, 5-day, 20 deg. C, weekly average60≤ 45 mg/L33%
November 2025Nitrogen, ammonia total [as N], monthly average40.84≤ 31 lb/d32%
November 2025Nitrogen, ammonia total [as N], monthly average6.89≤ 3.26 mg/L111%
November 2025Nitrogen, ammonia total [as N], weekly average120.19≤ 47 lb/d156%
November 2025Nitrogen, ammonia total [as N], weekly average20.1≤ 4.89 mg/L311%
December 2025Nitrogen, ammonia total [as N], monthly average45.29≤ 31 lb/d46%
December 2025Nitrogen, ammonia total [as N], monthly average7.62≤ 3.26 mg/L134%
December 2025Nitrogen, ammonia total [as N], weekly average103.78≤ 47 lb/d121%
December 2025Nitrogen, ammonia total [as N], weekly average15.4≤ 4.89 mg/L215%
January 2026BOD, 5-day, 20 deg. C, weekly average60≤ 45 mg/L33%
February 2026%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia, monthly average28≤ 25 %12%
August 2026%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia, daily maximum93≤ 40 %133%
August 2026%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia, monthly average93≤ 25 %272%
August 2026Nitrogen, ammonia total [as N], weekly average53.8≤ 45 lb/d20%
August 2026Nitrogen, ammonia total [as N], weekly average6.93≤ 4.72 mg/L47%

Limits in force (49)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 4 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≤ 281 lb/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 422 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≤ 281 lb/dall year
Solids, total suspendedweekly average≤ 422 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≤ 3.26 mg/LJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 3.15 mg/LMar–Oct
Nitrogen, ammonia total [as N]weekly average≤ 4.89 mg/LJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 4.72 mg/LMar–Oct
Nitrogen, ammonia total [as N]monthly average≤ 31 lb/dJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 30 lb/dMar–Oct
Nitrogen, ammonia total [as N]weekly average≤ 47 lb/dJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 45 lb/dMar–Oct
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]weekly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (lb/d)all year
Phosphorus, total [as P]weekly averagereport only (lb/d)all year
Hardness, total [as CaCO3]monthly averagereport only (mg/L)all year
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year
Hardness, total [as CaCO3]monthly averagereport only (lb/d)all year
Hardness, total [as CaCO3]daily maximumreport only (lb/d)all year
Copper, total [as Cu]monthly average≤ .0349 mg/Lall year
Copper, total [as Cu]daily maximum≤ .0481 mg/Lall year
Copper, total [as Cu]monthly average≤ .3274 lb/dall year
Copper, total [as Cu]daily maximum≤ .4513 lb/dall 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≤ .019 mg/Lall year
Chlorine, total residualdaily maximum≤ .033 mg/Lall year
Chlorine, total residualmonthly average≤ .18 lb/dall year
Chlorine, total residualdaily maximum≤ .31 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
%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/SC0021601 · MCP: https://passage-data.com/mcp