State sheet · OK
Tier II reporting requirements in Oklahoma
- Deadline
- 1 March, yearly
- Takes our file
- Yes
- Own thresholds
- No — federal
- Fee
- $15–$1,000
- Filing route read
- 2026-09-14
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How Oklahoma takes it
Oklahoma takes the Tier2 Submit file through the DEQ Online Filing System, and DEQ passes it on to the local committee and fire department for you.
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. Oklahoma passes it on for you — one submission covers all three. Worth a call to your county, though: a few run their own list on top.
Before you send it — what else Oklahoma asks for
Two small things. Oklahoma charges a filing fee, set in its rule at OAC 252:20-1-7. It is $15 per hazardous substance and $30 per extremely hazardous substance, capped at $1,000 per company. Oil and gas production sites and agriculture chemical dealerships pay $12 per facility instead, with the same cap. The good news is the part you do not have to do: DEQ says it distributes your report to the local emergency planning committee and fire department, so filing once with DEQ covers all three.
Does Oklahoma set its own limits?
We have read Oklahoma's own code and it uses the federal thresholds. That is a checked answer, not an assumption.
Oklahoma adopts the federal thresholds by reference: OAC 252:20-1-3 incorporates Parts 355 and 370 of 40 CFR in their entirety. Filing online with DEQ also satisfies the local emergency planning committee and fire department copies, so you file once rather than three times (OAC 252:20-1-6(c)). The fee is in the section above.
The words we read
Oklahoma Administrative Code 252:20-1-3, read in the rule PDF (oklahoma.gov, rules/020.pdf) 2026-09-06 and again 2026-09-14: “The following Parts of 40 CFR are, unless otherwise specified, incorporated by reference in their entirety: (1) Part 355 (Emergency Planning and Notification); (2) Part 370 (Hazardous Chemical Reporting: Community Right-to-Know)”, and “In the Parts of 40 CFR incorporated by reference, the term ‘Commission’ shall mean the Department.” So the thresholds are the federal ones, adopted by reference. The rule pins that reference to the “July, 2009” edition of 40 CFR; the threshold numbers are the same in the current edition. Oklahoma DEQ, Tier II reporting page, says the same in its own words: extremely hazardous substances “over 500 lbs or the TPQ whichever is lower”; all other hazardous materials “over 10,000 lbs”; retail gasoline “over 75,000 gallons if stored underground”; diesel “over 100,000 gallons”.
Where we read this
- OAC 252:20-1-4(b), read in the rule PDF 2026-09-06 and again 2026-09-14: “Tier II forms shall be submitted to the Department (DEQ) electronically via the DEQ internet website utilizing DEQ approved software. Only submissions via the website shall be accepted.”OAC 252:20-1-6(c), same reading: “Any requirement … to submit a paper Tier II report to the appropriate Local Emergency Planning Committee (LEPC) and to the local Fire Department is met by reporting to DEQ via electronic on-line internet reporting as the Department will make the information available, in a timely fashion, to the LEPCs and Fire Departments.”Oklahoma DEQ, “Tier II Reporting” page (oklahoma.gov/deq), read 2026-09-11: reports “must be generated with Tier2Submit Software and submitted through the DEQ Online Filing System”; “the DEQ acts as the state’s central repository … DEQ distributes them to Local Emergency Planning Committees (LEPCs) and fire departments statewide”.OAC 252:20-1-7, Fees: “$15.00 per hazardous substance”, “$30.00 per extremely hazardous substance”, “With a $1,000 maximum fee per company”; “For owner/operators of oil and natural gas production facilities (SIC code 1311): (A) $12.00 per reported facility (B) With a $1,000 maximum fee per company”; “For agriculture chemical dealerships: (A) $12.00 per facility (B) With a $1,000 maximum fee per company.”Checked 2026-09-14
- Oklahoma Administrative Code 252:20-1-3, read in the rule PDF (oklahoma.gov, rules/020.pdf) 2026-09-06 and again 2026-09-14: “The following Parts of 40 CFR are, unless otherwise specified, incorporated by reference in their entirety: (1) Part 355 (Emergency Planning and Notification); (2) Part 370 (Hazardous Chemical Reporting: Community Right-to-Know)”, and “In the Parts of 40 CFR incorporated by reference, the term ‘Commission’ shall mean the Department.” So the thresholds are the federal ones, adopted by reference. The rule pins that reference to the “July, 2009” edition of 40 CFR; the threshold numbers are the same in the current edition.Oklahoma DEQ, Tier II reporting page, says the same in its own words: extremely hazardous substances “over 500 lbs or the TPQ whichever is lower”; all other hazardous materials “over 10,000 lbs”; retail gasoline “over 75,000 gallons if stored underground”; diesel “over 100,000 gallons”.The state’s own code
- Oklahoma’s own Tier II pageWe can be right today and the state can change tomorrow. This link does not go stale.
If something here is wrong, the checker has a way to tell us on every answer screen. We would rather be corrected than confident.
Find out whether you have to file
Tell us what you keep on site and we work it out against the federal list and Oklahoma’s own rules, showing the regulation behind every number.
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