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Calvert Cliffs Nuc. Power Plant, LLC

Electric Services, major discharger, Lusby, Maryland. NPDES permit MD0002399, in force until Oct 31, 2027. Last 12 months: no values over a limit, 4 of 46 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due

About 28 days after each period: outfall 001 form A monthly (6 values), outfall 101 form A monthly (21 values), outfall 102 form A monthly (8 values), outfall 104 form A monthly (8 values), outfall 103 form A yearly, outfall 106 form A yearly

Renewal application due

May 4, 2027 · 180 days before expiry; your permit may set another date

Last report on file

August 2026

Oct 2024 – Sep 2025

0 values over a limit, 10 required values missing, 5 of 50 reports late

Limits in force (79)

How strict are these limits?

• Chlorine, total residual, monthly average .0075 mg/L — stricter than 99% of 221 other major industrial and other permits nationwide
• Chlorine, total residual, daily maximum .013 mg/L — stricter than 95% of 420 other major industrial and other permits nationwide
• Oxidants, total residual, monthly average .0075 mg/L — stricter than 85% of 20 other major industrial and other permits nationwide; 5% have the same limit

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

Same industry: the 8 Electric Services permits in Maryland.

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MD0002399 · MCP: https://passage-data.com/mcp