Illinois Tier II reporting: how and where to file
Tier II is filed electronically in Hazconnect, IEMA-OHS's online system; paper copies are refused. Filed between January 1 and March 1 for the previous year; IEMA-OHS may report late filers to EPA.
From Illinois Emergency Management Agency and Office of Homeland Security (IEMA-OHS), read on the state's own page · September 26, 2026
What Illinois asks for
Each point below is followed by the state's own words, so you can check it against the source.
How to file
Tier II is filed electronically in Hazconnect, IEMA-OHS's online system; paper copies are refused.
“The Illinois Emergency Management Agency and Office of Homeland Security (IEMA-OHS) requires all regulated facilities to submit (Tier II) information electronically by using Hazconnect, IEMA-OHS's online filing system.” source
“DO NOT SUBMIT HARD COPIES TO IEMA AS HARD COPIES ARE NOT ACCEPTED AND WILL BE SHREDDED.” source
Deadline
Filed between January 1 and March 1 for the previous year; IEMA-OHS may report late filers to EPA.
“must submit Tier II forms between January 1 and March 1” source
“IEMA-OHS reserves the right to provide Federal EPA notification of delinquent accounts, which fail to submit Annual Reports by March 1st each year.” source
Who gets the report
An LEPC may take the report by email, as a scanned, signed copy generated from Hazconnect.
“If desirable, the LEPC can accept Tier II Reports, via email, provided they are scanned and signed copies of the original, generated directly from Hazconnect.” source
State-specific rule
Illinois requires the SDSs to be attached, as PDFs, to each chemical in the Tier II.
“Electronic Safety Data Sheets (SDSs) shall be attached to current (2025) Tier II chemical entries in the Hazconnect Chemical Section (Step 2 of filing process).” 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 Illinois'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.
Illinois Tier II FAQ
How do I file Tier II in Illinois?
Tier II is filed electronically in Hazconnect, IEMA-OHS's online system; paper copies are refused.
When is Tier II due in Illinois?
Filed between January 1 and March 1 for the previous year; IEMA-OHS may report late filers to EPA.
Do I still send the report to the LEPC and fire department in Illinois?
An LEPC may take the report by email, as a scanned, signed copy generated from Hazconnect.
More on Illinois
Tier II in other states
Sources
Illinois'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 Illinois Emergency Management Agency and Office of Homeland Security (IEMA-OHS) before you file. General guidance, not legal advice.
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