An extremely hazardous substance crossed its planning quantity
The clock starts the first day you hold the substance at or above its threshold planning quantity — a number set per substance, often far below 10,000 pounds.
What you owe, and by when
Notice that you hold an extremely hazardous substance — within 60 days.
The rule: 42 U.S.C. 11002(c)
Example: started 2026-04-14, due 2026-06-13.
Free. No account, no email.
Who it goes to
- State Emergency Response Commission (SERC)
- Local Emergency Planning Committee (LEPC)
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
Anhydrous ammonia in a refrigeration system, chlorine cylinders at a pool or water plant, sulfuric acid in bulk. Some planning quantities are as low as 1 pound, and many are 10, so a single cylinder can do it.
If you have already missed it
This is the notice that puts your site on the local emergency plan. Until it is sent, the people who would respond to a release at your site do not know the substance is there.
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.
Check my facility