Passage Data · Check a report · Use it from your AI

Duke Energy Carolinas LLC

Electric Services, major discharger, Mount Holly, North Carolina. NPDES permit NC0004961, in force until Mar 31, 2031. Last 12 months: no values over a limit, 28 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 31 days after each period: form M monthly (7 values)
Last report on file: None

Limits in force (7)

Parameter	Statistic	Limit	Months
pH	daily minimum	≥ 6 SU	all year
pH	daily maximum	≤ 9 SU	all year
Solids, total suspended	30-day average	≤ 23 mg/L	all year
Solids, total suspended	daily maximum	≤ 75 mg/L	all year
Oil & Grease	30-day average	≤ 11 mg/L	all year
Oil & Grease	daily maximum	≤ 15 mg/L	all year
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year

How strict are these limits?

Solids, total suspended, 30-day average 23 mg/L — stricter than 86% of 29 other major industrial and other permits in North Carolina; 3% have the same limit
Oil & Grease, 30-day average 11 mg/L — stricter than 85% of 54 other major industrial and other permits nationwide; 2% have the same limit
Oil & Grease, daily maximum 15 mg/L — stricter than 32% of 720 other major industrial and other permits nationwide; 56% have the same limit

Cited limits by parameter: North Carolina's rules and the federal ones.

Same industry: the 20 Electric Services permits in North Carolina.

Check this month's numbers Email me before each report is due

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/NC0004961 · MCP: https://passage-data.com/mcp