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Chelsea City - Cso

Sewerage Systems, major discharger, Chelsea, Massachusetts. NPDES permit MA0101877 expired Jan 31, 2019; its limits still apply. Last 12 months: no values over a limit, 3 of 33 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 46 days after each period: outfall 003 form A quarterly (2 values), outfall 004 form A quarterly (2 values), outfall 008 form A quarterly (2 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 36 reports late

Limits in force (6)

ParameterStatisticLimitMonthsOutfall
Overflowsmonthly totalreport only (occur/d)all year003
Flow, totalmonthly totalreport only (gal/mo)all year003
Overflowsmonthly totalreport only (occur/d)all year004
Flow, totalmonthly totalreport only (gal/mo)all year004
Overflowsmonthly totalreport only (occur/d)all year008
Flow, totalmonthly totalreport only (gal/mo)all year008

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

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MA0101877 · MCP: https://passage-data.com/mcp