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Electric Services, major discharger, Semora, North Carolina. NPDES permit NC0003425, in force until Jun 30, 2030. Last 12 months: no values over a limit, 21 required values missing, 9 of 99 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | daily minimum | ≥ 6 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 001 |
| Oil & Grease | 30-day average | ≤ 15 mg/L | all year | 001 |
| Oil & Grease | daily maximum | ≤ 20 mg/L | all year | 001 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 001 |
| Arsenic, total [as As] | 30-day average | ≤ 10 ug/L | all year | 001 |
| Arsenic, total [as As] | daily maximum | ≤ 340 ug/L | all year | 001 |
| Chromium, hexavalent [as Cr] | daily maximum | report only (ug/L) | all year | 001 |
| Selenium, total [as Se] | daily maximum | report only (ug/L) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 001 |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year | 001 |
| pH | daily maximum | report only (SU) | all year | 002 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 002 |
| Oil & Grease | 30-day average | ≤ 15 mg/L | all year | 002 |
| Oil & Grease | daily maximum | ≤ 20 mg/L | all year | 002 |
| Arsenic, total [as As] | daily maximum | report only (ug/L) | all year | 002 |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | all year | 002 |
| Molybdenum, total [as Mo] | daily maximum | report only (ug/L) | all year | 002 |
| Antimony, total [as Sb] | daily maximum | report only (ug/L) | all year | 002 |
| Selenium, total [as Se] | daily maximum | report only (ug/L) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year | 002 |
| Flow, total | 30-day average | ≤ 4 MGD | all year | 002 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 003 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 003 |
| Turbidity | 30-day average | ≤ 50 NTU | all year | 003 |
| Turbidity | daily maximum | ≤ 50 NTU | all year | 003 |
| pH | daily minimum | ≥ 6 SU | all year | 003 |
| pH | daily maximum | ≤ 9 SU | all year | 003 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1 mg/L | all year | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5 mg/L | all year | 003 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 003 |
| Arsenic, total [as As] | daily maximum | report only (ug/L) | all year | 003 |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | all year | 003 |
| Selenium, total [as Se] | daily maximum | report only (ug/L) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| Chlorine, total residual | daily maximum | ≤ 28 ug/L | all year | 003 |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year | 003 |
| Chromium, total [as Cr] | 30-day average | ≤ 200 ug/L | all year | 005 |
| Chromium, total [as Cr] | daily maximum | ≤ 200 ug/L | all year | 005 |
| Zinc, total [as Zn] | 30-day average | ≤ 1 mg/L | all year | 005 |
| Zinc, total [as Zn] | daily maximum | ≤ 1 mg/L | all year | 005 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 005 |
| Chlorine, total residual | daily maximum | report only (ug/L) | all year | 005 |
| Chlorine, free available | 30-day average | ≤ 200 ug/L | all year | 005 |
| Chlorine, free available | daily maximum | ≤ 500 ug/L | all year | 005 |
| pH | daily minimum | ≥ 6 SU | all year | 006 |
| pH | daily maximum | ≤ 9 SU | all year | 006 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 006 |
| Oil & Grease | daily maximum | ≤ 20 mg/L | all year | 006 |
| Selenium, total [as Se] | daily maximum | report only (ug/L) | all year | 006 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 006 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 011 |
| pH | daily maximum | report only (SU) | all year | 012A |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | 012A |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 012A |
| Oil & Grease | 30-day average | ≤ 15 mg/L | all year | 012A |
| Oil & Grease | daily maximum | ≤ 20 mg/L | all year | 012A |
| Arsenic, total [as As] | daily maximum | report only (ug/L) | all year | 012A |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | all year | 012A |
| Molybdenum, total [as Mo] | daily maximum | report only (ug/L) | all year | 012A |
| Antimony, total [as Sb] | daily maximum | report only (ug/L) | all year | 012A |
| Selenium, total [as Se] | daily maximum | report only (ug/L) | all year | 012A |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 012A |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year | 012A |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | 012B |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 012B |
| Oil & Grease | 30-day average | ≤ 15 mg/L | all year | 012B |
| Oil & Grease | daily maximum | ≤ 20 mg/L | all year | 012B |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 012B |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 012B |
| pH | daily minimum | ≥ 6 SU | all year | 014 |
| pH | daily maximum | ≤ 9 SU | all year | 014 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | 014 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 014 |
| Oil & Grease | 30-day average | ≤ 15 mg/L | all year | 014 |
| Oil & Grease | daily maximum | ≤ 20 mg/L | all year | 014 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 014 |
Cited limits by parameter: North Carolina's rules and the federal ones.
Same industry: the 20 Electric Services permits in North Carolina.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/NC0003425 · MCP: https://passage-data.com/mcp