Regulatory Text: 
Oklahoma Administrative Code.  Title 252.  Department of Environmental Quality 

Chapter 100.  Air Pollution Control

APPENDIX E. PRIMARY AMBIENT AIR QUALITY STANDARDS, SIP effective September 3, 2019 (OKd27)
As adopted in Oklahoma Register September 1, 2016 (33 OkReg 1460) effective September 15, 2016.
Submitted to EPA February 14, 2017 (OK-58),
Regulations.gov document EPA-R06-OAR-2017-0145-0003 [OK028.03] page 745.
Approved by EPA August 1, 2019 (84 FR 37579) SIP effective September 3, 2019 (OKd27),
Regulations.gov dockekt EPA-R06-OAR-2017-0145 [OK028].

(Appendix E is cited in 252:100-3-2.)

Time Period	Sulfur Dioxide	PM10	PM2.5	Carbon Monoxide	Ozone	Nitrogen Dioxide	Lead
1-hr. max	75 ppb(1)			40 mg/m3 35 ppm(2)		100 ppb(3)
8-hr. max				10 mg/m3 9 ppm(2)	0.070 ppm(4)
24-hr. max		150 ug/m3(5)	35 ug/m3(6)
Rolling 3-month average							0.15 ug/m3(7)
Annual			15 ug/m3(8)			53 ppb(9)

⁽¹⁾ The standard is attained when the 3-year average of the 99th percentile of the daily maximum 1-hour average at
each monitor within an area does not exceed 75 ppb, as determined in accordance with 40 CFR Part 50, Appendix T.
⁽²⁾ The standard is attained when the 1-hour average concentration does not exceed 35 ppm and the 8-hour average
concentration does not exceed 9 ppm as provided in 40 CFR 50.8.
⁽³⁾ The standard is attained when the 3-year average of the 98th percentile of the daily maximum 1-hour average
concentration at each monitor within an area does not exceed 100 ppb as determined in accordance with 40 CFR
Part 50, Appendix S.
⁽⁴⁾ The standard is attained when the computed 3-year average of the annual 4th-highest daily maximum 8-hour
average does not exceed 0.070 ppm, as provided in 40 CFR 50.19.
⁽⁵⁾ The standard is attained when the expected number of days per calendar year with a 24-hour average concentration
above 150 ug/m³, as determined in accordance with 40 CFR Part 50, Appendix K is equal to or less than one.
⁽⁶⁾ The standard is attained when the 98th percentile concentration is equal to or less than the numerical standard as
determined by 40 CFR Part 50, Appendix N.
⁽⁷⁾ The standard is attained when the rolling 3-month maximum average does not exceed 0.15 ug/m3 more than once
during a 3-year period as provided in 40 CFR 50.16.
⁽⁸⁾ The standard is attained when the annual arithmetic mean is equal to or less than the numerical standard as
determined by 40 CFR Part 50, Appendix N.
⁽⁹⁾ The standard is attained when the annual arithmetic mean does not exceed 53 ppb as provided in 40 CFR 50.11.