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Sewerage Systems, Clayton, North Carolina. NPDES permit NC0064246, in force until Apr 30, 2028. Last 12 months: over a limit 13 times (last April 2026), 16 required values missing, 10 of 10 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| December 2025 | BOD, 5-day, 20 deg. C, 30-day average | 12 mg/L | ≤ 9 mg/L | 33% |
| December 2025 | BOD, 5-day, 20 deg. C, daily maximum | 24.4 mg/L | ≤ 13.5 mg/L | 81% |
| December 2025 | Coliform, fecal MF, MFC broth, 44.5 C, daily maximum | 600 #/100mL | ≤ 400 #/100mL | 50% |
| January 2026 | BOD, 5-day, 20 deg. C, 30-day average | 13.875 mg/L | ≤ 9 mg/L | 54% |
| January 2026 | BOD, 5-day, 20 deg. C, daily maximum | 22.8 mg/L | ≤ 13.5 mg/L | 69% |
| January 2026 | Coliform, fecal MF, MFC broth, 44.5 C, daily maximum | 600 #/100mL | ≤ 400 #/100mL | 50% |
| February 2026 | BOD, 5-day, 20 deg. C, 30-day average | 13.775 mg/L | ≤ 9 mg/L | 53% |
| February 2026 | BOD, 5-day, 20 deg. C, daily maximum | 27.7 mg/L | ≤ 13.5 mg/L | 105% |
| March 2026 | BOD, 5-day, 20 deg. C, 30-day average | 21.475 mg/L | ≤ 9 mg/L | 139% |
| March 2026 | BOD, 5-day, 20 deg. C, daily maximum | 39.5 mg/L | ≤ 13.5 mg/L | 193% |
| March 2026 | Coliform, fecal MF, MFC broth, 44.5 C, daily maximum | 600 #/100mL | ≤ 400 #/100mL | 50% |
| March 2026 | Coliform, fecal MF, MFC broth, 44.5 C, monthly geometric mean | 312.2314 #/100mL | ≤ 200 #/100mL | 56% |
| April 2026 | Coliform, fecal MF, MFC broth, 44.5 C, daily maximum | 600 #/100mL | ≤ 400 #/100mL | 50% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year |
| Oxygen, dissolved [DO] | daily minimum | ≥ 5 mg/L | all year |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | all year |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | all year |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 9 mg/L | all year |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 13.5 mg/L | all year |
| pH | daily minimum | ≥ 6 SU | all year |
| pH | daily maximum | ≤ 9 SU | all year |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, total [as N] | daily maximum | report only (lb/mo) | all year |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2 mg/L | Apr–Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4 mg/L | Jan, Feb, Mar, Nov, Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10 mg/L | Apr–Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 20 mg/L | Jan, Feb, Mar, Nov, Dec |
| 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 |
| Coliform, fecal MF, MFC broth, 44.5 C | monthly geometric mean | ≤ 200 #/100mL | all year |
| Coliform, fecal MF, MFC broth, 44.5 C | daily maximum | ≤ 400 #/100mL | all year |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ .015 MGD | all year |
| Chlorine, total residual | daily maximum | ≤ 17 ug/L | all year |
| Flow, total | daily maximum | report only (Mgal/mo) | all year |
Cited limits by parameter: North Carolina's rules and the federal ones.
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