State sheet · CT
Tier II reporting requirements in Connecticut
- Deadline
- 1 March, yearly
- Takes our file
- Yes
- Own thresholds
- No — federal
- Fee
- None stated
- Filing route read
- 2026-09-11
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How Connecticut takes it
Connecticut files through Hazconnect, where you key the data in. It will also take a Tier2 Submit file by email to DEEP.CTEPCRA@ct.gov, but only when something stops you from using Hazconnect. Plan on Hazconnect.
Connecticut’s own pages name no filing fee. That is not the same as the state saying there is none, so if it matters to your budget, ring them and ask.
The file we build is the one this state works from.
The filing is due 1 March each year and covers the calendar year before it. Connecticut does not pass it on for you — we checked. Filing closes the state’s copy only; your local committee and fire department each need their own from you.
Before you send it — what else Connecticut asks for
Connecticut asks for more than the federal form, and some of it we cannot do for you. DEEP wants the precise locations of your chemicals, including a site plan of the property — our file carries no drawing. And filing in Hazconnect does not finish the job: Connecticut says you must submit the Tier II information to the local emergency planning committee and to the fire department with jurisdiction over your facility yourself, with the site plan and the safety data sheets attached. We do not hold your suppliers’ sheets. Conn. Gen. Stat. §§ 22a-609, 22a-610.
Does Connecticut set its own limits?
Connecticut's own agency says it uses the federal thresholds, and we read that page rather than assuming it. We have not gone behind it to the state code, so we say that too.
Connecticut uses the federal thresholds unchanged. What is particular there is not the numbers but the paperwork: the state copy goes through Hazconnect, and you separately send the local emergency planning committee and the fire department their own copies with the site plan and safety data sheets attached.
The words we read
Connecticut SERC, “Chemical Inventory Reporting Tier II” (portal.ct.gov/SERC), read 2026-09-10, sets out the duty in the federal terms and adds no Connecticut threshold. Its retail-station numbers are the federal special thresholds: “The reporting threshold for gasoline to 75,000 gallons and diesel fuel to 100,000 gallons at retail gas stations that store their product entirely underground and are in full compliance.” Its worked examples are federal too — “A walk-in cooler or refrigeration system with more than 500 lbs of ammonia requires reporting”, and “Most pesticides contain EHSs and have Tier II reporting thresholds from 1-10,000 lbs”, which is the EHS TPQ range rather than a state number. This is the commission’s page, not the General Statutes; we have not gone behind it to the code, so we grade it as guidance rather than codified.
CT SERC pages as read 2026-09-10
Where we read this
- CT DEEP/SERC, “Chemical Inventory Reporting (Tier II)” (portal.ct.gov), read 2026-09-06: “the Connecticut State Emergency Response Commission and the Department of Energy and Environmental Protection will be using the free Hazconnect Tier II Manager system to manage EPCRA Tier II chemical inventory reports due March 1”, and “Reports submitted via Hazconnect Tier II Manager system can be exported to Tier2 Submit and CAMEO” — that is the outbound direction. EPA, “State Tier II Reporting Requirements and Procedures” — Connecticut: “CT DEEP uses the online Hazconnect Tier II Manager system and also accepts EPA’s Tier2 Submit electronic file submissions via email”. That second sentence is the only reason we say our file is usable here. DEEP also asks for the precise locations of the chemicals, including a site plan, which you can upload into the reporting system.Connecticut SERC, “Reporting Requirements Under EPCRA” and “Chemical Inventory Reporting Tier II” (portal.ct.gov/SERC), read 2026-09-10. On the local copies: “Facilities are still required to directly submit reports to their Local Emergency Planning Committee and local Fire Department, with Site Plan and SDS attachments”, and “You must submit Tier II information to the LEPC and the fire department who has jurisdiction over your facility.” Deadline: “Tier II reports are due on or before March 1.” No Connecticut filing fee appears on either page.Connecticut General Statutes chapter 446l, Emergency Response Commission (cga.ct.gov), read 2026-09-11: §22a-610 is the inventory section, and it puts the annual form, by 1 March, in front of the local emergency planning committee, the state commission and the fire department; §22a-609 covers “submission of material safety data for certain chemicals”. A “hazardous chemical” there is one needing a safety data sheet under the Occupational Safety and Health Act of 1970, or one on a list required to be filed under §22a-609.CT SERC, “Reporting Requirements Under EPCRA” (portal.ct.gov/SERC, last updated 14 January 2026), read 2026-10-12: “Connecticut will accept submittal of reports via EPA’s Tier2 Submit™ Software with electronic file submissions sent to DEEP.CTEPCRA@ct.gov only f[if] needed due to unique circumstances preventing use of the Hazconnect platform.”Checked 2026-09-11
- Connecticut SERC, “Chemical Inventory Reporting Tier II” (portal.ct.gov/SERC), read 2026-09-10, sets out the duty in the federal terms and adds no Connecticut threshold. Its retail-station numbers are the federal special thresholds: “The reporting threshold for gasoline to 75,000 gallons and diesel fuel to 100,000 gallons at retail gas stations that store their product entirely underground and are in full compliance.” Its worked examples are federal too — “A walk-in cooler or refrigeration system with more than 500 lbs of ammonia requires reporting”, and “Most pesticides contain EHSs and have Tier II reporting thresholds from 1-10,000 lbs”, which is the EHS TPQ range rather than a state number. This is the commission’s page, not the General Statutes; we have not gone behind it to the code, so we grade it as guidance rather than codified.State guidance — the code wins where they differ · CT SERC pages as read 2026-09-10
- Connecticut’s own Tier II pageWe can be right today and the state can change tomorrow. This link does not go stale.
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