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Town of Columbus

Sewage treatment plant, Columbus, North Carolina. NPDES permit NC0021369 expired Jul 31, 2023; its limits still apply. Last 12 months: no values over a limit, 30 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 31 days after each period: form M monthly (15 values)
Last report on file
May 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (19)

ParameterStatisticLimitMonths
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Oxygen, dissolved [DO]daily maximumreport only (mg/L)all year
BOD, 5-day, 20 deg. C7-day average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. C30-day average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspended7-day average≤ 45 mg/Lall year
Solids, total suspended30-day average≤ 30 mg/Lall year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year
Cyanide, total [as CN]daily maximumreport only (ug/L)all year
Cadmium, total [as Cd]daily maximumreport only (ug/L)all year
Copper, total [as Cu]daily maximumreport only (mg/L)all year
Silver, total [as Ag]daily maximumreport only (ug/L)all year
Coliform, fecal MF, MFC broth, 44.5 Cweekly geometric mean≤ 400 #/100mLall year
Coliform, fecal MF, MFC broth, 44.5 Cmonthly geometric mean≤ 200 #/100mLall year
Flow, in conduit or thru treatment plant30-day average≤ .8 MGDall year
Chlorine, total residualdaily maximum≤ 28 ug/Lall year

Cited limits by parameter: North 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/NC0021369 · MCP: https://passage-data.com/mcp