Northrop Grumman Systems Corporation

NPDES permit MD0072222 · Minor NON-POTW · administratively continued, expires 2025-08-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2025-08-31 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

EPA's record, 2025-09-01 to 2026-08-31

0values over a limit

0required values missing, on 0 form(s)

0of 4 forms filed late

Last period with anything received: 2026-06-30.

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among MD permits in EPA's filings — check your permit).

Outfall 001, form A (21-DP-3870): files for periods ending in Mar, Jun, Sep, Dec

Limits in force (6)

Outfall	Parameter	Statistic	Limit	Months
001	Temp. diff. between intake and discharge	DAILY MX	<= 0 deg F	all year
001	Temp. diff. between intake and discharge	DAILY MX	<= 0 deg F	all year
001	Flow	DAILY MX	report only	all year
001	Flow	DAILY MX	report only	all year
001	Flow	MO AVG	report only	all year
001	Flow	MO AVG	report only	all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states