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Sewerage Systems, Clayton, North Carolina. NPDES permit NC0064564, in force until Mar 31, 2028. Last 12 months: over a limit 3 times (last April 2026), 52 required values missing, 11 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| January 2026 | Nitrogen, ammonia total [as N], 30-day average | 13.3833 mg/L | ≤ 4 mg/L | 235% |
| January 2026 | Nitrogen, ammonia total [as N], daily maximum | 23 mg/L | ≤ 20 mg/L | 15% |
| April 2026 | BOD, 5-day, 20 deg. C, daily maximum | 9.8 mg/L | ≤ 7.5 mg/L | 31% |
| 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) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Jun–Sep |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Jun–Sep |
| Oxygen, dissolved [DO] | daily minimum | ≥ 6 mg/L | all year |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | Jun–Sep |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | Jun–Sep |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 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 | daily maximum | ≤ 7.5 mg/L | Apr–Oct |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 15 mg/L | Jan, Feb, Mar, Nov, Dec |
| 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] | 90-day average | ≤ 2 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 | ≤ .75 MGD | 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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