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Sewage treatment plant, major discharger, Durham, North Carolina. NPDES permit NC0023841, in force until Jan 31, 2029. Last 12 months: no values over a limit, 143 required values missing, 11 of 44 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 001 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Jun–Sep | 001 |
| Conductivity | daily maximum | report only (umho/cm) | all year | 001 |
| Conductivity | daily maximum | report only (umho/cm) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Conductivity | daily maximum | report only (umho/cm) | Jun–Sep | 001 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 7 mg/L | all year | 001 |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | Jun–Sep | 001 |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 7.5 mg/L | Apr–Oct | 001 |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 15 mg/L | Jan, Feb, Mar, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 5 mg/L | Apr–Oct | 001 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 10 mg/L | Jan, Feb, Mar, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 001 |
| pH | daily minimum | ≥ 6 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| pH | daily maximum | report only (SU) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| pH | daily maximum | report only (SU) | Jun–Sep | 001 |
| Solids, total suspended | 7-day average | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | daily maximum | report only (lb/mo) | all year | 001 |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 3 mg/L | Apr–Oct | 001 |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 6 mg/L | Jan, Feb, Mar, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1 mg/L | Apr–Oct | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2 mg/L | Jan, Feb, Mar, Nov, Dec | 001 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | 90-day average | ≤ 2 mg/L | Jan, Feb, Mar, Nov, Dec | 001 |
| Cyanide, total [as CN] | 30-day average | ≤ 5 ug/L | all year | 001 |
| Cyanide, total [as CN] | daily maximum | ≤ 22 ug/L | all year | 001 |
| Silver, total [as Ag] | 30-day average | ≤ .06 ug/L | all year | 001 |
| Silver, total [as Ag] | daily maximum | ≤ 1.29 ug/L | all year | 001 |
| Coliform, fecal MF, MFC broth, 44.5 C | weekly geometric mean | ≤ 400 #/100mL | all year | 001 |
| Coliform, fecal MF, MFC broth, 44.5 C | monthly geometric mean | ≤ 200 #/100mL | all year | 001 |
| Coliform, fecal MF, MFC broth, 44.5 C | daily maximum | report only (#/100mL) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Coliform, fecal MF, MFC broth, 44.5 C | daily maximum | report only (#/100mL) | Jun–Sep | 001 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ 20 MGD | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ 17 ug/L | all year | 001 |
| Flow, total | daily maximum | report only (Mgal/mo) | all year | 001 |
| 1,4-Dioxane | daily maximum | report only (ug/L) | all year | 001 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Jun–Sep | D02 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | D02 |
| Conductivity | daily maximum | report only (umho/cm) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | D02 |
| Conductivity | daily maximum | report only (umho/cm) | Jun–Sep | D02 |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | D02 |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | Jun–Sep | D02 |
| pH | daily maximum | report only (SU) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | D02 |
| pH | daily maximum | report only (SU) | Jun–Sep | D02 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | Jun–Sep | D02 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | D02 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | D02 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | D02 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | D02 |
| Phosphate, ortho [as PO4] | daily maximum | report only (mg/L) | all year | D02 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Jun–Sep | D02 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | D02 |
| Coliform, fecal MF, MFC broth, 44.5 C | daily maximum | report only (#/100mL) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | D02 |
| Coliform, fecal MF, MFC broth, 44.5 C | daily maximum | report only (#/100mL) | Jun–Sep | D02 |
| Chlorophyll A | daily maximum | report only (mg/L) | all year | D02 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Apr–Oct | D03 |
| Conductivity | daily maximum | report only (umho/cm) | Apr–Oct | D03 |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | Apr–Oct | D03 |
| pH | daily maximum | report only (SU) | Apr–Oct | D03 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | Apr–Oct | D03 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | D03 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Apr–Oct | D03 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | D03 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | Apr–Oct | D03 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | D03 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | D03 |
| Phosphate, ortho [as PO4] | daily maximum | report only (mg/L) | Apr–Oct | D03 |
| Phosphate, ortho [as PO4] | daily maximum | report only (mg/L) | all year | D03 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Apr–Oct | D03 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | D03 |
| Chlorophyll A | daily maximum | report only (mg/L) | Apr–Oct | D03 |
| Chlorophyll A | daily maximum | report only (mg/L) | all year | D03 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Apr–Oct | D04 |
| Conductivity | daily maximum | report only (umho/cm) | Apr–Oct | D04 |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | Apr–Oct | D04 |
| pH | daily maximum | report only (SU) | Apr–Oct | D04 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | Apr–Oct | D04 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | D04 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Apr–Oct | D04 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | D04 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | Apr–Oct | D04 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | D04 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | D04 |
| Phosphate, ortho [as PO4] | daily maximum | report only (mg/L) | Apr–Oct | D04 |
| Phosphate, ortho [as PO4] | daily maximum | report only (mg/L) | all year | D04 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Apr–Oct | D04 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | D04 |
| Chlorophyll A | daily maximum | report only (mg/L) | Apr–Oct | D04 |
| Chlorophyll A | daily maximum | report only (mg/L) | all year | D04 |
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/NC0023841 · MCP: https://passage-data.com/mcp