Montana Tier II reporting: how and where to file
Montana takes Tier II online through E-Plan and collects no state fee.
From Montana Department of Environmental Quality (DEQ), read on the state's own page · September 26, 2026
What Montana asks for
Each point below is followed by the state's own words, so you can check it against the source.
How to file
Montana takes Tier II online through E-Plan and collects no state fee.
“Montana uses E-Plan for accepting online submission of Tier II chemical inventory information.” source
“Montana does not collect fees for this submittal.” source
State thresholds
No report is needed for a year in which you stayed under every threshold.
“No, a report is not needed if you did not exceed the reporting threshold for the entire calendar year.” source
Who gets the report
Ask your county LEPC and fire department whether they take electronic filings; if not, send them a paper copy.
“If they cannot accept electronic filings, a paper copy will need to be sent to the LEPC and fire department.” 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 Montana'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.
Montana Tier II FAQ
How do I file Tier II in Montana?
Montana takes Tier II online through E-Plan and collects no state fee.
Does Montana use the federal Tier II thresholds?
No report is needed for a year in which you stayed under every threshold.
Do I still send the report to the LEPC and fire department in Montana?
Ask your county LEPC and fire department whether they take electronic filings; if not, send them a paper copy.
More on Montana
Tier II in other states
Sources
Montana'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 Montana Department of Environmental Quality (DEQ) before you file. General guidance, not legal advice.
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