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City of Henderson

Sewage treatment plant, major discharger, Henderson, North Carolina. NPDES permit NC0020559, in force until Mar 31, 2028. Last 12 months: no values over a limit, 306 required values missing, 16 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 32 days after each period: outfall 001 form M monthly (35 values), outfall 001A form M monthly (9 values)
Renewal application due
Oct 3, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 25 required values missing, 16 of 24 reports late

Limits in force (54)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigradedaily maximumreport only (deg C)all year001
Temperature, water deg. centigradedaily maximumreport only (deg C)Jan, Feb, Mar, Nov, Dec001
Temperature, water deg. centigradedaily maximumreport only (deg C)Jan, Feb, Mar, Nov, Dec001
Conductivitydaily maximumreport only (umho/cm)all year001
Conductivitydaily maximumreport only (umho/cm)all year001
Conductivitydaily maximumreport only (umho/cm)all year001
Oxygen, dissolved [DO]daily minimum≥ 6 mg/Lall year001
Oxygen, dissolved [DO]daily maximumreport only (mg/L)Jan, Feb, Mar, Nov, Dec001
Oxygen, dissolved [DO]daily maximumreport only (mg/L)Jan, Feb, Mar, Nov, Dec001
BOD, 5-day, 20 deg. C7-day average≤ 9 mg/LApr–Oct001
BOD, 5-day, 20 deg. C7-day average≤ 18 mg/LJan, Feb, Mar, Nov, Dec001
BOD, 5-day, 20 deg. C30-day average≤ 6 mg/LApr–Oct001
BOD, 5-day, 20 deg. C30-day average≤ 12 mg/LJan, Feb, Mar, Nov, Dec001
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year001
pHdaily minimum≥ 6 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspended7-day average≤ 45 mg/Lall year001
Solids, total suspended30-day average≤ 30 mg/Lall year001
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Nitrogen, total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, ammonia total [as N]7-day average≤ 9 mg/LApr–Oct001
Nitrogen, ammonia total [as N]7-day average≤ 18 mg/LJan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]30-day average≤ 3 mg/LApr–Oct001
Nitrogen, ammonia total [as N]30-day average≤ 6 mg/LJan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all year001
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all year001
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all year001
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all year001
Phosphorus, total [as P]90-day average≤ 1 mg/LApr–Sep001
Phosphorus, total [as P]90-day average≤ 1.5 mg/LJan, Feb, Mar, Nov, Dec001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
Zinc, total [as Zn]30-day average≤ 238 ug/Lall year001
Zinc, total [as Zn]daily maximum≤ 238 ug/Lall year001
Coliform, fecal MF, MFC broth, 44.5 Cweekly geometric mean≤ 400 #/100mLall year001
Coliform, fecal MF, MFC broth, 44.5 Cmonthly geometric mean≤ 200 #/100mLall year001
Coliform, fecal MF, MFC broth, 44.5 Cdaily maximumreport only (#/100mL)all year001
Coliform, fecal MF, MFC broth, 44.5 Cdaily maximumreport only (#/100mL)all year001
Chlorophyll Adaily maximumreport only (mg/L)Apr–Oct001
Flow, in conduit or thru treatment plant30-day average≤ 4.14 MGDall year001
Chlorine, total residualdaily maximum≤ 17 ug/Lall year001
Temperature, water deg. centigradedaily maximumreport only (deg C)all year001A
Conductivitydaily maximumreport only (umho/cm)all year001A
Oxygen, dissolved [DO]daily maximumreport only (mg/L)all year001A
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Apr–Oct001A
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)Apr–Oct001A
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)Apr–Oct001A
Phosphorus, total [as P]daily maximumreport only (mg/L)Apr–Oct001A
Coliform, fecal MF, MFC broth, 44.5 Cdaily maximumreport only (#/100mL)all year001A
Chlorophyll Adaily maximumreport only (mg/L)Apr–Oct001A

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/NC0020559 · MCP: https://passage-data.com/mcp