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Sewage treatment plant, major discharger, Navassa, North Carolina. NPDES permit NC0086819 expired Sep 30, 2024; its limits still apply. Last 12 months: over a limit 12 times (last July 2026), 3 of 10 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| November 2025 | Copper, total [as Cu], 30-day average | 2.4114 ug/L | ≤ 1.8 ug/L | 34% |
| November 2025 | Copper, total [as Cu], daily maximum | 8.05 ug/L | ≤ 2.9 ug/L | 178% |
| November 2025 | Zinc, total [as Zn], daily maximum | 109 ug/L | ≤ 47.6 ug/L | 129% |
| December 2025 | Copper, total [as Cu], 30-day average | 1.92 ug/L | ≤ 1.8 ug/L | 7% |
| January 2026 | Copper, total [as Cu], 30-day average | 1.81 ug/L | ≤ 1.8 ug/L | 1% |
| January 2026 | Nitrogen, ammonia total [as N], 30-day average | 3.05 mg/L | ≤ 2 mg/L | 53% |
| February 2026 | Enterococci, monthly geometric mean | 36.7617 MPN/100mL | ≤ 35 #/100mL | 5% |
| February 2026 | Nitrogen, ammonia total [as N], 30-day average | 6.9912 mg/L | ≤ 2 mg/L | 250% |
| February 2026 | Nitrogen, ammonia total [as N], 7-day average | 8.3714 mg/L | ≤ 6 mg/L | 40% |
| March 2026 | Nitrogen, ammonia total [as N], 30-day average | 6.7844 mg/L | ≤ 2 mg/L | 239% |
| March 2026 | Nitrogen, ammonia total [as N], 7-day average | 9.8833 mg/L | ≤ 6 mg/L | 65% |
| July 2026 | pH, daily minimum | 6.4 SU | ≥ 6.8 SU | — |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year |
| Conductivity | daily maximum | report only (umho/cm) | all year |
| Oxygen, dissolved [DO] | daily minimum | ≥ 6 mg/L | all year |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 7.5 mg/L | Apr–Oct |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 15 mg/L | Jan, Feb, Mar, Nov, Dec |
| 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 | report only (mg/L) | all year |
| pH | daily minimum | ≥ 6.8 SU | all year |
| pH | daily maximum | ≤ 8.5 SU | all year |
| Solids, total suspended | 7-day average | ≤ 15 mg/L | all year |
| Solids, total suspended | 30-day average | ≤ 10 mg/L | all year |
| Solids, total suspended | daily maximum | report only (mg/L) | all year |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 3 mg/L | Apr–Oct |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 6 mg/L | Jan, Feb, Mar, Nov, Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1 mg/L | Apr–Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2 mg/L | Jan, Feb, Mar, Nov, Dec |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year |
| Copper, total [as Cu] | 30-day average | ≤ 1.8 ug/L | all year |
| Copper, total [as Cu] | daily maximum | ≤ 2.9 ug/L | all year |
| Nickel, total [as Ni] | 30-day average | ≤ 4.1 ug/L | all year |
| Nickel, total [as Ni] | daily maximum | ≤ 37.3 ug/L | all year |
| Zinc, total [as Zn] | 30-day average | ≤ 42.8 ug/L | all year |
| Zinc, total [as Zn] | daily maximum | ≤ 47.6 ug/L | all year |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ 4.975 MGD | all year |
| Enterococci | weekly geometric mean | ≤ 276 #/100mL | all year |
| Enterococci | monthly geometric mean | ≤ 35 #/100mL | all year |
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/NC0086819 · MCP: https://passage-data.com/mcp