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

Scwu-PWR

Sewerage Systems, Columbia, South Carolina. NPDES permit SC0029475 expired Jun 30, 2023; its limits still apply. Last 12 months: over a limit once (last July 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
1 value over a limit, 0 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimitOver by
July 2026E. coli, daily maximum1732≤ 349 MPN/100mL396%

Limits in force (33)

ParameterStatisticLimitMonths
Oxygen demand, ultimatemonthly average≤ 315.1 lb/dMar–Oct
Oxygen demand, ultimatemonthly averagereport only (lb/d)Jan, Feb, Nov, Dec
Oxygen demand, ultimatedaily maximum≤ 630.2 lb/dMar–Oct
Oxygen demand, ultimatedaily maximumreport only (lb/d)Jan, Feb, Nov, Dec
Oxygen, dissolved [DO]minimum≥ 5 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 25 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 50 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 60 lb/dall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 120 lb/dall year
pHminimum≥ 6 SUall year
pHmaximum≤ 8 SUall year
Solids, total suspendedmonthly average≤ 90 mg/Lall year
Solids, total suspendeddaily maximum≤ 180 mg/Lall year
Solids, total suspendedmonthly average≤ 216 lb/dall year
Solids, total suspendeddaily maximum≤ 432 lb/dall year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)all year
Nitrogen, ammonia 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
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≤ .5 mg/Lall year
Chlorine, total residualdaily maximum≤ 1 mg/Lall year
Chlorine, total residualmonthly average≤ 1.2 lb/dall year
Chlorine, total residualdaily maximum≤ 2.4 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

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/SC0029475 · MCP: https://passage-data.com/mcp