Cape Fear Public Utility Authority — NPDES permit NC0023965: limits, due date and EPA's record

Sewage treatment plant, major discharger, Wilmington, North Carolina. NPDES permit NC0023965, in force until Nov 30, 2028. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Limits in force (24)

Parameter	Statistic	Limit	Months
Temperature, water deg. centigrade	daily maximum	report only (deg C)	all year
Oxygen, dissolved [DO]	daily minimum	≥ 6 mg/L	all year
BOD, 5-day, 20 deg. C	7-day average	≤ 15 mg/L	Jan, Feb, Mar, Nov, Dec
BOD, 5-day, 20 deg. C	7-day average	≤ 7.5 mg/L	Apr–Oct
BOD, 5-day, 20 deg. C	30-day average	≤ 10 mg/L	Jan, Feb, Mar, Nov, Dec
BOD, 5-day, 20 deg. C	30-day average	≤ 5 mg/L	Apr–Oct
BOD, 5-day, 20 deg. C	daily maximum	report only (mg/L)	all year
pH	daily minimum	≥ 6.8 SU	all year
pH	daily maximum	≤ 8.5 SU	all year
Solids, total suspended	7-day average	≤ 30 mg/L	all year
Solids, total suspended	30-day average	≤ 20 mg/L	all year
Solids, total suspended	daily maximum	report only (mg/L)	all year
Nitrogen, total [as N]	daily maximum	report only (mg/L)	all year
Nitrogen, ammonia total [as N]	7-day average	≤ 6 mg/L	Jan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]	7-day average	≤ 3 mg/L	Apr–Oct
Nitrogen, ammonia total [as N]	30-day average	≤ 2 mg/L	Jan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]	30-day average	≤ 1 mg/L	Apr–Oct
Nitrogen, Kjeldahl, total [as N]	daily maximum	report only (mg/L)	all year
Nitrite + Nitrate total [as N]	daily maximum	report only (mg/L)	all year
Phosphorus, total [as P]	daily maximum	report only (mg/L)	all year
Flow, in conduit or thru treatment plant	30-day average	≤ 16 MGD	all year
Chlorine, total residual	daily maximum	≤ 28 ug/L	all year
Enterococci	weekly geometric mean	≤ 276 #/100mL	all year
Enterococci	monthly geometric mean	≤ 35 #/100mL	all year

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/NC0023965 · MCP: https://passage-data.com/mcp