CHELSEA CITY - CSO

NPDES permit MA0101877 · Major NON-POTW · expired, expires 2019-01-31 · EPA's file as of 2026-09-19

This permit expired on 2019-01-31 and is expired: 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)

3of 33 forms filed late

Last period with anything received: 2026-07-31.

Reports are due about 46 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Outfall	Parameter	Statistic	Limit	Months
003	Overflows	MO TOTAL	report only	all year
003	Flow, total	MO TOTAL	report only	all year
004	Overflows	MO TOTAL	report only	all year
004	Flow, total	MO TOTAL	report only	all year
008	Overflows	MO TOTAL	report only	all year
008	Flow, total	MO TOTAL	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