Passage Data · Check a report · Use it from your AI

Union City of

Sewage treatment plant, major discharger, Union, South Carolina. NPDES permit SC0047244 expired Mar 31, 2026; its limits still apply. Last 12 months: over a limit 12 times (last August 2026), 1 of 27 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form 1 monthly (43 values), form 1A monthly (44 values), form 2 quarterly (8 values), form 3 quarterly (4 values), form 2A quarterly, form 3A quarterly
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 20 reports late

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

Period endingParameterReportedLimitOver by
October 2025Copper, total [as Cu], monthly average.046≤ .039 mg/L18%
November 2025Copper, total [as Cu], daily maximum.055≤ .054 mg/L2%
November 2025Copper, total [as Cu], monthly average.053≤ .039 mg/L36%
December 2025Copper, total [as Cu], monthly average.04≤ .039 mg/L3%
January 2026Copper, total [as Cu], monthly average.053≤ .039 mg/L36%
February 2026Copper, total [as Cu], monthly average.041≤ .039 mg/L5%
May 2026Copper, total [as Cu], daily maximum.056≤ .054 mg/L4%
May 2026Copper, total [as Cu], monthly average.056≤ .039 mg/L44%
July 2026Copper, total [as Cu], daily maximum.066≤ .054 mg/L22%
July 2026Copper, total [as Cu], monthly average.066≤ .039 mg/L69%
August 2026Copper, total [as Cu], daily maximum.068≤ .054 mg/L26%
August 2026Copper, total [as Cu], monthly average.068≤ .039 mg/L74%

Limits in force (115)

ParameterStatisticLimitMonths
Hydrogen peroxidedaily maximumreport only (mg/L)all year
Hydrogen peroxidedaily maximumreport only (mg/L)all year
Hydrogen peroxidedaily maximumreport only (lb/d)all year
Hydrogen peroxidedaily maximumreport only (lb/d)all year
Oxygen demand, ultimatemonthly average≤ 2321 lb/dall year
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 19 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 28.5 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 951 lb/dall year
BOD, 5-day, 20 deg. Cmonthly average≤ 751 lb/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 1426 lb/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 1126 lb/dall year
pHminimum≥ 6 SUall year
pHminimum≥ 6 SUall year
pHmaximum≤ 8.5 SUall year
pHmaximum≤ 8.5 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 1501 lb/dall year
Solids, total suspendedmonthly average≤ 751 lb/dall year
Solids, total suspendedweekly average≤ 2252 lb/dall year
Solids, total suspendedweekly average≤ 1126 lb/dall year
Nitrogen, total [as N]monthly averagereport only (mg/L)all 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]weekly averagereport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (lb/d)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, total [as N]weekly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]monthly average≤ 5.73 mg/LJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 5.45 mg/LMar–Oct
Nitrogen, ammonia total [as N]monthly average≤ 9.29 mg/Lall year
Nitrogen, ammonia total [as N]weekly average≤ 8.59 mg/LJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 8.17 mg/LMar–Oct
Nitrogen, ammonia total [as N]weekly average≤ 13.9 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 287 lb/dJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 273 lb/dMar–Oct
Nitrogen, ammonia total [as N]monthly average≤ 232 lb/dall year
Nitrogen, ammonia total [as N]weekly average≤ 430 lb/dJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 409 lb/dMar–Oct
Nitrogen, ammonia total [as N]weekly average≤ 348 lb/dall year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
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]weekly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (lb/d)all year
Phosphorus, total [as P]monthly averagereport only (lb/d)all year
Phosphorus, total [as P]weekly averagereport only (lb/d)all year
Phosphorus, total [as P]weekly averagereport only (lb/d)all year
Copper, total [as Cu]monthly average≤ .028 mg/Lall year
Copper, total [as Cu]monthly average≤ .039 mg/Lall year
Copper, total [as Cu]daily maximum≤ .039 mg/Lall year
Copper, total [as Cu]daily maximum≤ .054 mg/Lall year
Copper, total [as Cu]monthly average≤ 1.4 lb/dall year
Copper, total [as Cu]monthly average≤ .98 lb/dall year
Copper, total [as Cu]daily maximum≤ 2 lb/dall year
Copper, total [as Cu]daily maximum≤ 1.4 lb/dall year
Antimony, total [as Sb]monthly averagereport only (mg/L)all year
Antimony, total [as Sb]monthly averagereport only (mg/L)all year
Antimony, total [as Sb]daily maximumreport only (mg/L)all year
Antimony, total [as Sb]daily maximumreport only (mg/L)all year
Antimony, total [as Sb]monthly averagereport only (lb/d)all year
Antimony, total [as Sb]monthly averagereport only (lb/d)all year
Antimony, total [as Sb]daily maximumreport only (lb/d)all year
Antimony, total [as Sb]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 plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year
Chlorine, total residualmonthly average≤ .03 mg/Lall year
Chlorine, total residualmonthly average≤ .05 mg/Lall year
Chlorine, total residualdaily maximum≤ .052 mg/Lall year
Chlorine, total residualdaily maximum≤ .087 mg/Lall year
Chlorine, total residualmonthly average≤ 1.5 lb/dall year
Chlorine, total residualmonthly average≤ 1.3 lb/dall year
Chlorine, total residualdaily maximum≤ 2.6 lb/dall year
Chlorine, total residualdaily maximum≤ 2.2 lb/dall year
E. coli30-day geometric mean≤ 126 MPN/100mLall year
E. coli30-day geometric mean≤ 126 MPN/100mLall year
E. colidaily maximum≤ 349 MPN/100mLall year
E. colidaily maximum≤ 349 MPN/100mLall year
E. coli30-day geometric mean≤ 126 MPN/100mLall year
E. coli30-day geometric mean≤ 126 MPN/100mLall year
E. colidaily maximum≤ 800 MPN/100mLall year
E. colidaily maximum≤ 800 MPN/100mLall year
Peracetic Aciddaily maximum≤ 1 mg/Lall year
Peracetic Aciddaily maximum≤ 1 mg/Lall year
Peracetic Aciddaily maximum≤ 25 lb/dall year
Peracetic Aciddaily maximum≤ 50 lb/dall year
Chemical oxygen demand [COD]monthly averagereport only (mg/L)all year
Chemical oxygen demand [COD]monthly averagereport only (mg/L)all year
Chemical oxygen demand [COD]weekly averagereport only (mg/L)all year
Chemical oxygen demand [COD]weekly averagereport only (mg/L)all year
Chemical oxygen demand [COD]monthly averagereport only (lb/d)all year
Chemical oxygen demand [COD]monthly averagereport only (lb/d)all year
Chemical oxygen demand [COD]weekly averagereport only (lb/d)all year
Chemical oxygen demand [COD]weekly averagereport only (lb/d)all year
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year
LC50 Static 48Hr Acute Ceriodaphnia dubiadaily minimumreport only (%)all year
LC50 Static 48Hr Acute Ceriodaphnia dubiadaily minimumreport only (%)all year
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly average≤ 25 %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
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiadaily maximum≤ 40 %all year
IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiadaily minimumreport 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.

Check this month's numbers Email me before each report is due

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/SC0047244 · MCP: https://passage-data.com/mcp