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Town of Biscoe

Sewage treatment plant, Biscoe, North Carolina. NPDES permit NC0021504 expired Jun 30, 2026; its limits still apply. Last 12 months: over a limit once (last October 2025), 3 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 30 days after each period: form M monthly (23 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 1 required value missing, 3 of 12 reports late

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

Period endingParameterReportedLimitOver by
October 2025Flow, in conduit or thru treatment plant, 30-day average.535 MGD≤ .5 MGD7%

Limits in force (23)

ParameterStatisticLimitMonths
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Specific conductancedaily maximumreport only (umho/cm)all year
Specific conductancedaily maximumreport only (umho/cm)all year
Specific conductancedaily maximumreport only (umho/cm)all year
Oxygen, dissolved [DO]daily minimum≥ 6 mg/Lall year
Oxygen, dissolved [DO]daily maximumreport only (mg/L)all year
Oxygen, dissolved [DO]daily maximumreport only (mg/L)all year
BOD, 5-day, 20 deg. C7-day average≤ 43.5 mg/Lall year
BOD, 5-day, 20 deg. C30-day average≤ 29 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]7-day average≤ 18 mg/Lall year
Nitrogen, ammonia total [as N]30-day average≤ 6 mg/Lall 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≤ .5 MGDall year
Chlorine, total residualdaily maximum≤ 17 ug/Lall year

How strict are these limits?

Cited limits by parameter: North Carolina's rules and the federal ones.

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/NC0021504 · MCP: https://passage-data.com/mcp