Missouri Tier II reporting: how and where to file
Filed between January 1 and March 1, for the previous year. The report counts as filed only once it is marked ready for submission on the Fee Sheet and any past-due fees are paid; electronic signatures are accepted.
From Missouri Emergency Response Commission (MERC), read on the state's own page · September 26, 2026
What Missouri asks for
Each point below is followed by the state's own words, so you can check it against the source.
Deadline
Filed between January 1 and March 1, for the previous year.
“MISSOURI TIER II reports are due between January 1 and March 1 annually, the reporting information is for the previous year.” source
Fees
The report counts as filed only once it is marked ready for submission on the Fee Sheet and any past-due fees are paid; electronic signatures are accepted.
“Your Tier II is not complete until the box is checked that says ready for submission and any past due the fees have been paid.” source
“We can now accept electronic signatures; this is the name you input at the bottom of the facility page.” 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 Missouri'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.
Missouri Tier II FAQ
When is Tier II due in Missouri?
Filed between January 1 and March 1, for the previous year.
Does Missouri charge a Tier II fee?
The report counts as filed only once it is marked ready for submission on the Fee Sheet and any past-due fees are paid; electronic signatures are accepted.
More on Missouri
Tier II in other states
Sources
Missouri'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 Missouri Emergency Response Commission (MERC) before you file. General guidance, not legal advice.
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