Columbia Gas Transmission Corp

NPDES permit OH0123722 · Minor NON-POTW · effective, expires 2028-12-31 · EPA's file as of 2026-09-19

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

0values over a limit

0required values missing, on 0 form(s)

0of 12 forms filed late

Last period with anything received: 2026-08-31.

Reports are due about 20 days after each monitoring period ends (the most common figure among OH permits in EPA's filings — check your permit).

Outfall	Parameter	Statistic	Limit	Months
001	Flow rate	MO AVG	report only	all year
001	Flow rate	DAILY MX	report only	all year
001	pH	DAILY MN	>= 6.5 SU	all year
001	pH	DAILY MX	<= 9 SU	all year
001	Oil and grease, hexane extr method	DAILY MX	<= 10 mg/L	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