You brought in a chemical you have not reported before
The clock starts the day the chemical is first present at your site above its threshold — not the day you notice, and not the following January.
What you owe, and by when
Safety data sheet (or list) for a chemical you had not reported — within 3 months (some states are shorter).
The rule: 42 U.S.C. 11021(d)(1)
Example: started 2026-04-14, due 2026-07-14.
Free. No account, no email.
Who it goes to
- State Emergency Response Commission (SERC)
- Local Emergency Planning Committee (LEPC)
- The fire department with jurisdiction
Some states change this list or add a filing of their own — we write down what each one told us.
What this usually looks like
A new supplier, a new process, a bigger tank, or a drum that used to sit at another site. It does not have to be exotic: diesel, propane and sulfuric acid all cross thresholds at ordinary volumes.
If you have already missed it
The duty does not expire — you still owe the sheet or the list, and filing it late is better than not filing it. It also carries into your next annual inventory, so a missed one tends to show up on the March filing anyway.
How we help with this one
The checker is free and needs no account: tell it what you keep on site and it works out which of these clocks are running for you, with the rule behind each one. Paying is what turns them into a watched list — we hold the dates and tell you once, before each is due.
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