Tier II Reporting

EPCRA sections 311-312: Hazardous Chemical Inventory Reporting

  • Facilities must provide an annual inventory report to SERC, LEPC, and local fire departments in the form of a Tier II Report due by March 1 of each year.


On December 14th, DEQ hosted an online training for Tier II Reporting in Oklahoma. That recording can be found HERE

The powerpoint used in the beginning of the video can be viewed HERE



Ther TIer II Program was recently highlighted in the DEQ Series, “DID You Know”. That video can be found 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. That recording can be found HERE

Tier II 101

January 11th Ponca City Kay County LEPC Meeting 11:30am, Pioneer Technology Center, 2101 N Ash St Room B-120
February 9th Pryor Mayes County LEPC Meeting 11:30am, Hillcrest Hospital Pryor, 111 N Bailey St – Large Classroom
February 16th Oklahoma City Oklahoma County LEPC Meeting 2:00pm, Oklahoma DEQ Offices, 707 N Robinson Ave, OKC, OK

Tier II Filing Assistance


For the 2023 Calendar year, the DEQ hosted workshops around the state. To schedule for a 30 minute appointment, please contact Matt Wormus

Date City Address
January 11th Ponca City Pioneer Technology Center, 2101 N Ash St Room B-134
January 18th Enid DEQ Office, 115 W Broadway Ave Suite 209
January 19th Woodward DEQ Office, 2411 Williams Ave Suite 116
January 25th Duncan DEQ Office, 1313 W Ash Ave Suite 106
January 26th Ardmore DEQ Office, 18407 Scenic State Highway 77
February 1st Ada DEQ Office, 2401 Egypt Rd
February 2nd McAlester DEQ Office, 321 South 3rd St Suite 5
February 7th Tulsa DEQ Office, 9933 E 16th St S
February 8th Tulsa DEQ Office, 9933 E 16th St S
February 9th Pryor Hillcrest Hospital, 111 N Bailey St –  Large Classroom
February 10th Hominy C&G Oilfield Equipment, Inc., 1011 N Eastern Ave

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

Effective July 1, 2022, the Oklahoma Department of Environmental Quality will begin assessing customers a merchant fee in the amount of 2.25% of the amount due if paying via credit or debit card.

Additionally, a portal fee of $2.00 will be charged for each transaction paid by a credit or debit card.

For questions regarding the above-referenced transaction fees or to inquire about payment options, please email ARHelpdesk@deq.ok.gov or call (405)702-1130.

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.