Colorado wants you to build your Tier II report the standard federal way, in EPA's Tier2 Submit software, then upload the exported file through the state's AccessGov portal -- it's the upload step, not the file format, that's Colorado-specific.
The Colorado Department of Public Health and Environment runs Tier II reporting through a portal called AccessGov. The workflow is a little different from a straight email-based state: you still build the report in EPA's free Tier2 Submit software, export it as a .T2S file, and then upload that file into AccessGov rather than emailing it anywhere. CDPHE's own guidance is explicit that email submissions aren't accepted at all.
Federal thresholds apply -- 10,000 pounds for hazardous chemicals requiring an SDS, 500 pounds or the TPQ for extremely hazardous substances.40 CFR 370.10 Colorado's own instructions list the deadline specifically as 5:00pm Mountain time on March 1st, which is worth noting if you're used to states that just say "by March 1" without a time attached.
Before you touch the chemical inventory itself, CDPHE's instructions list your Dun & Bradstreet number as an early step in the process -- easy to overlook if you're used to states where it's buried further into the form. There's also a real fee, calculated during submission through AccessGov itself rather than published as one flat number in advance.
That second point is worth sitting with, because it cuts against how most people think state portals work. In quite a few other states, one submission genuinely does satisfy the SERC, LEPC, and fire department all at once. Colorado isn't structured that way, and assuming it is because other states work differently is exactly the kind of mistake that surfaces months later when a local agency asks why they never received anything.
HazRecord keeps your chemical inventory and Dun & Bradstreet-level facility details organized year-round, and generates the validated .T2S export ready for AccessGov upload. It also flags the LEPC/fire-department distribution as a separate checklist item specifically for Colorado, rather than assuming a single filing covers it.
This guide is for general informational purposes only. It is not legal advice. Facilities remain responsible for verifying and submitting required reports to the appropriate federal, state, tribal, and local agencies.
HazRecord helps facilities organize chemical inventory, SDS records, storage locations, and Tier II reporting preparation in one place.