Tier II Reporting

EPCRA sections 311-312: Hazardous Chemical Inventory Reporting

  • Facilities handling or storing hazardous chemicals above the Threshold Planning Quantity (TPQ) must provide all Safety Data Sheets (SDS) to the State Emergency Response Commission (SERC), Local Emergency Planning Committee (LEPC), andlocal fire departments.
  • Facilities must provide an annual inventory report to SERC, LEPC, and local fire departments in the form of a Tier II Report due on March 1 of each year.

Tier II Resources

Filing InstructionsDownload Last Year's ReportAssistanceFees


Facilities may log-in to the DEQ Online Filing System to download their Tier II Report from the previous reporting year. Usernames and passwords do not change from year-to-year.

  • If you have lost your username and/or password contact us or call (405) 702-5100
  • First time filers will need to obtain a username and password by calling Matt Wormus (405) 702-5100


Unsure if your facility filed a Tier II Report last year?

Filing Assistance

Chemical Reporting and Preparedness staff can help you navigate the Tier2Submit software, import last year’s report, determine accurate Lat/Long coordinates, and submit your report via the DEQ Online Filing System.

  • Schedule an appointment with a staff member online or by calling (405) 702-5100.
  • What to bring: a list of all your facility locations, contact names with phone numbers, and all reportable chemicals; as well as any site plans or other attachments you wish to submit. One-on-one assistance with you Oklahoma Tier II Report submission will usually take less than 30 minutes.

Training and Workshops

The deadline to file a 2018 Tier II Report was March 1, 2019. Check back soon for the 2020 training schedule.


Oklahoma Tier II Fees*


  • Oil and Natural Gas Production Facilities: $12.00/ reported facility
  • Agriculture Chemical Dealerships: $12.00/ reported facility
  • Facilities under any other NAICS code:
    • Hazardous Substance (as defined in 40 CFR Part 370): $15.00/ substance
    • Extremely Hazardous Substance (as defined in 40 CFR Part 355): $30.00/ substance


*Maximum fee charged for a single reporting year is $1,000.00 per company. See OAC 252:20-1-7 for more information

Frequently Asked Questions

What are Oklahoma's Tier II reporting requirements?
  • In Oklahoma, Tier II reports are submitted annually to DEQ only; DEQ distributes to Local Emergency Planning Committees (LEPC) and fire departments
  • Tier II reports must be submitted electronically to DEQ via the DEQ Online Filing Stystem
  • Tier II reports must be prepared using the latest version of EPA software Tier2Submit
What facilities are covered under EPCRA 311 and 312?
Any facility required to maintain MSDSs (SDSs) under the Occupational Health and Safety Administration (OSHA) regulations for hazardous substances stored in the workplace is also required to file a Tier II report for all chemicals that meet or exceed the Threshold Planning Quantity (TPQ).  
What is a Hazardous Substance?
A hazardous substance is defined by the OSHA Hazard Communication Standard and poses a health and/or physical safety hazard. Facilities with chemicals exceeding these thresholds must also report under EPCRA:

  • Extremely Hazardous Substances (EHS): over 500 lbs or the TPQ whichever is lower (see List of Lists)
  • Gasoline (all grades combined) at a retail gas station: over 75,000 gallons if stored underground
  • Diesel (all grades combined) at a retail gas station: over 100,000 gallons if stored underground
  • All other hazardous materials: over 10,000 lbs
Where can I find my facility's username and password?
  • Usernames and passwords do not change. If you have already filed a Tier II report with the State and forgot your username and/or password give us a call at (405) 702-5100
  • If you are a first time filer or wish to obtain a new account contact Matt Wormus or call (405) 702-5100 for assistance
I get an error when I try to download my report from last year, what should I do?
Contact us or call (405) 702-5100 for assistance.

Contact Us

Contact us or call the DEQ Land Protection Division at (405) 702-5100 for assistance.