Massachusetts Tier II reporting: how and where to file
The SERC receives Tier II reports through the Hazconnect system.
From Massachusetts State Emergency Response Commission (SERC), read on the state's own page · September 26, 2026
What Massachusetts asks for
Each point below is followed by the state's own words, so you can check it against the source.
How to file
The SERC receives Tier II reports through the Hazconnect system.
“The Massachusetts SERC receives Tier II reports through submissions to the Hazconnect System.” source
The federal rule underneath
EPCRA section 312 applies to a facility that the OSHA HazCom Standard requires to keep an SDS for a hazardous chemical present at any one time at or above 10,000 lb, or at or above 500 lb or its threshold planning quantity, whichever is lower, for an extremely hazardous substance (40 CFR 370.10(a)). The report covers the previous calendar year and is due March 1 (40 CFR 370.45). Where Massachusetts's rules above are stricter, they apply on top.
The full federal picture, Tier I versus Tier II, counting and penalties, is on the EPCRA Tier II hub. The list that feeds it is the chemical inventory.
HazComFast keeps each jobsite's chemical quantities next to its safety data sheets and exports the Tier II data as an Excel workbook, a CSV file and a PDF summary.
Massachusetts Tier II FAQ
How do I file Tier II in Massachusetts?
The SERC receives Tier II reports through the Hazconnect system.
More on Massachusetts
Tier II in other states
Sources
- www.mass.gov/info-details/massachusetts-state-emergency-response-commission-serc
- ecfr.gov/current/title-40/part-370
Massachusetts's requirements read on the state's own page on September 26, 2026; 40 CFR part 370 read on the eCFR the same day. States change portals and fees; confirm with Massachusetts State Emergency Response Commission (SERC) before you file. General guidance, not legal advice.
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