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Sewage treatment plant, major discharger, Kings Mountain, North Carolina. NPDES permit NC0020737, in force until Aug 31, 2028. Last 12 months: over a limit 11 times (last August 2026), 1 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| April 2026 | Nitrogen, ammonia total [as N], 30-day average | 10.1571 mg/L | ≤ 2.6 mg/L | 291% |
| April 2026 | Nitrogen, ammonia total [as N], 7-day average | 11.06 mg/L | ≤ 7.8 mg/L | 42% |
| May 2026 | Nitrogen, ammonia total [as N], 30-day average | 12.29 mg/L | ≤ 2.6 mg/L | 373% |
| May 2026 | Nitrogen, ammonia total [as N], 7-day average | 14.4 mg/L | ≤ 7.8 mg/L | 85% |
| May 2026 | Silver, total [as Ag], 30-day average | 1.48 ug/L | ≤ .31 ug/L | 377% |
| May 2026 | Solids, total suspended, 30-day average | 109.032 mg/L | ≤ 30 mg/L | 263% |
| May 2026 | Solids, total suspended, 7-day average | 377.74 mg/L | ≤ 45 mg/L | 739% |
| June 2026 | Nitrogen, ammonia total [as N], 7-day average | 9.54 mg/L | ≤ 7.8 mg/L | 22% |
| July 2026 | Chlorine, total residual, daily maximum | 97 ug/L | ≤ 28 ug/L | 246% |
| August 2026 | Chlorine, total residual, daily maximum | 65 ug/L | ≤ 28 ug/L | 132% |
| August 2026 | Coliform, fecal MF, MFC broth, 44.5 C, weekly geometric mean | 413.3814 #/100mL | ≤ 400 #/100mL | 3% |
| 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) | Jun–Sep |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| Conductivity | daily maximum | report only (umho/cm) | all year |
| Conductivity | daily maximum | report only (umho/cm) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| Conductivity | daily maximum | report only (umho/cm) | Jun–Sep |
| Conductivity | daily maximum | report only (umho/cm) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec |
| Conductivity | daily maximum | report only (umho/cm) | Jun–Sep |
| Oxygen, dissolved [DO] | daily minimum | ≥ 5 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 | 7-day average | ≤ 42 mg/L | Apr–Oct |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 45 mg/L | Jan, Feb, Mar, Nov, Dec |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 28 mg/L | Apr–Oct |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 30 mg/L | Jan, Feb, Mar, Nov, Dec |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year |
| pH | daily minimum | ≥ 6 SU | all year |
| pH | daily maximum | ≤ 9 SU | all year |
| Solids, total suspended | 7-day average | ≤ 45 mg/L | all year |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year |
| Solids, total suspended | daily maximum | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 7.8 mg/L | Apr–Oct |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 26.7 mg/L | Jan, Feb, Mar, Nov, Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.6 mg/L | Apr–Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8.9 mg/L | Jan, Feb, Mar, Nov, Dec |
| Thallium, total [as Tl] | 30-day average | ≤ 10.2 ug/L | all year |
| Thallium, total [as Tl] | daily maximum | ≤ 10.2 ug/L | all year |
| Silver, total [as Ag] | 30-day average | ≤ .31 ug/L | all year |
| Silver, total [as Ag] | daily maximum | ≤ 4.6 ug/L | all year |
| Selenium, total [as Se] | 30-day average | ≤ 15.8 ug/L | all year |
| Selenium, total [as Se] | daily maximum | ≤ 245 ug/L | all year |
| Coliform, fecal MF, MFC broth, 44.5 C | weekly geometric mean | ≤ 400 #/100mL | all year |
| Coliform, fecal MF, MFC broth, 44.5 C | monthly geometric mean | ≤ 200 #/100mL | all year |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ 3 MGD | all year |
| Chlorine, total residual | daily maximum | ≤ 28 ug/L | all year |
Cited limits by parameter: North Carolina's rules and the federal ones.
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