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Northrop Grumman Systems Corporation

Industrial or other facility, Annapolis, Maryland. NPDES permit MD0072222, in force until Aug 31, 2031. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 28 days after each period: form A quarterly
Last report on file: June 2026
Oct 2024 – Sep 2025: 0 values over a limit, 0 required values missing, 0 of 4 reports late

Limits in force (6)

Parameter	Statistic	Limit	Months
Temp. diff. between intake and discharge	daily maximum	≤ 0 deg F	all year
Temp. diff. between intake and discharge	daily maximum	≤ 0 deg F	all year
Flow	daily maximum	report only (MGD)	all year
Flow	daily maximum	report only (MGD)	all year
Flow	monthly average	report only (MGD)	all year
Flow	monthly average	report only (MGD)	all year

Cited limits by parameter: Maryland'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/MD0072222 · MCP: https://passage-data.com/mcp