Tier II hazardous chemical inventory reporting


EPCRA Sections 311/312 require the submission of a Tier II form for the storage of hazardous chemicals that exceed federal thresholds. The purpose of this form is to provide state and local emergency planning officials and the public with information on the general hazard types and locations of hazardous chemicals present at a facility during the previous calendar year.


Tier II Data

Tier II reports track chemicals stored at a facility during the previous calendar year. CDPHE manages and disseminates this data to emergency planners and first responders.

Learn more

Tier II FAQs

Facilities with questions about Tier II reporting, visit the FAQ page.

Learn more


Tier II reporting instructions

Reports for Tier II must occur through the Colorado Environmental Online System (CEOS). This will take place in three steps:

1. Create a report.
Each year, the software is updated and the new version must be downloaded and used by the reporter.

  Tier2Submit Software Download

All Tier II reporters must download the updated software every year.
2. Create a CEOS account.
All reporting companies are required to create an account in CEOS. If you don't have one, click the link below to get started. If you already have a CEOS account, you can proceed to step 3.
3. Submittal and payment.
Once the report has been created in Tier2Submit and registration in CEOS has been completed, companies MUST submit the final Tier II report through CEOS. Online payment fees will be generated through CEOS and can be completed when submission is done. E-mail submissions will NOT be accepted. The deadline for report submission is 5:00 p.m. (MST) March 1, 2024.
See how fees for the Tier II program are structured.

Need Help?


Invoicing questions

303-692-3645, option #4


Contact for Tier II-specific questions

Gabe Catenacci


Tier2Submit Software help



U.S. Environmental Protection Agency EPCRA Hotline

TDD: 1-800-553-7672
9 a.m. - 6 p.m. Eastern time Monday-Friday


Reporting questions help line

EPA 1-800-424-9346 ext.4


Additional Information

Facilities are not required to provide the same report to the local emergency planning committee (LEPC) or the local fire department unless those agencies maintain local reporting requirements. Please check with your LEPC and fire department for local requirements.

Colorado Emergency Planning Committee (CEPC)

Local Emergency Planning Committee (LEPC)

Preparedness: Emergency Planning and Community Right-to-Know (EPCRA)

Tier II frequently requested information