If you've seen older guidance saying Connecticut accepts a .t2s file by email, that's outdated. Since the state rolled out Hazconnect, the portal is the actual intake system, and .t2s is just something you can export from inside it.
The Connecticut Department of Energy and Environmental Protection manages EPCRA data for the state's Emergency Response Commission, and since 2023 the primary reporting system has been Hazconnect, DEEP's own Tier II Manager platform.
Search around and you'll find older EPA-hosted summaries describing Connecticut as accepting a .t2s file emailed directly to DEEP. That description predates the 2023 Hazconnect rollout. Current CT DEEP guidance is consistent: you register in Hazconnect, submit your report there, and if you want a .t2s copy, Hazconnect can export one for your own records or for sharing with CAMEO -- it's not a parallel submission channel to DEEP.
Standard federal thresholds -- 10,000 pounds for hazardous chemicals, 500 pounds or the TPQ for extremely hazardous substances.40 CFR 370.10 Deadline is March 1st for the previous calendar year, same as everywhere else.
Registration is straightforward: sign up, choose "Reporting Facility/Business User," and make sure your facility details are entered correctly so future years pre-populate from the previous submission. Once your account is approved, you file directly in the system. LEPC and fire department contacts are pre-populated in Hazconnect for many towns, which is genuinely more convenient than states where you have to track that information down yourself.
There's a per-chemical fee, and Connecticut's own guidance suggests checking with CT SERC for the current rate rather than relying on a number that may have changed since it was last published.
HazRecord keeps your chemical inventory and SDS records current throughout the year, so the actual Hazconnect data entry is transcription, not reconstruction. And because the platform can export a validated .t2s file when you want one for your own records, that option stays available even though it's no longer the submission method itself.
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.