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), and local 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.

***The DEQ recently held an online Tier II Training in preparation for the 2022 Annual Report. That training can be viewed HERE***

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) 702-5156
  • First time filers will need to obtain a username and password by contacting Matt Wormus 
  • If your file fails to download, contact us via email and staff will send you a .ZIP File


Unsure if your facility filed a Tier II Report?

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.


Training and Workshops

The DEQ recently held a virtual training on how to file a Tier II Report in Oklahoma. The recording of this training can be found HERE

Tier II 101

Jan 12 Kay County LEPC Meeting – 11:30am 2101 N Ash St, Ponca City, OK;    Room B120
Feb 17 Oklahoma County LEPC Meeting – 2:00pm Virtual. Email Matt Wormus for Link


Tier II Filing Assistance


For the 2022 Calendar year, the DEQ will be hosting the usual Tier II Filing Assistance Events around the state. If you are interested in one of the below dates, a time between 8am and 4pm can be requested here. You may also call DEQ Staff at any point for assistance or guidance regarding your Tier II Report





11-Jan Stillwater DEQ Office 2600 S Main St Suite B1
12-Jan Ponca City – Pioneer Technology Center 2101 N Ash St;     Seminar Center East
13-Jan Enid DEQ Office 115 W Broadway Ave Suite 209
18-Jan Woodward DEQ Office 2411 Williams Ave Suite 116
19-Jan Lawton DEQ Office 601 SW C Avenue
25-Jan Ardmore DEQ Office 18407 Scenic State Highway 77
27-Jan Ada DEQ Office 2401 Egypt Rd
1-Feb Henryetta DEQ Office 124 S 4th St
2-Feb McAlester DEQ Office 321 South 3rd St Suite 5
8-Feb Tulsa DEQ Office 9933 E 16th St S
9-Feb Tulsa DEQ Office 9933 E 16th St S
15-Feb Tecumseh DEQ Office 19905 Gordon Cooper Dr
16-Feb Duncan DEQ Office 1313 W Ash Ave Suite 106


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) 702-5156
  • If you are a first time filer or wish to obtain a new account contact Matt Wormus
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.