Oklahoma Department of Environmental Quality
2024 OKLAHOMA SO2
Highest 1 Hour Daily Highs (ppb) through November 18, 2024
   
Site          2023 Daily Max 1-hr Values   3 Year Avg of 99th Percentile
2021 2022 2023 1st 2nd 3rd 4th* 20-22 Avg 21-23 Avg 2023
99th %  99th %  99th % (date) (date)  (date)  (date) 99th % 99th % Critical Value
  Ponca City  (604)   12.0 10.0 8.0 7.0 14 7 213
27.0 10.0 5.0 1-Feb 11-Mar 12-Mar 10-Oct      
  OKC North (1037) 1.0 1.0 1.0 1.0 1.0 1.0 226
1.0 1.0 1.0 30-Jan 9-Feb 17-Feb 26-Feb    
  Tulsa Newblock  (175) 5.0 4.0 4.0 4.0 6 6 215
5.0 6.0 7.0 4-Mar 7-Aug 23-Oct 29-Oct      
  Tulsa TCWD (235) 2.0 1.0 1.0 1.0 4 3 221
4.0 2.0 5.0 30-Sep 3-Jan 11-Jan 16-Jan    
  Tulsa Central (1127) 3.2 3.1 2.9 2.8 3 3 221
2.2 3.6 3.1 23-Oct 20-Jan 22-May 14-Oct      
  Oxbow/Kremlin (555) 64.0 60.0 54.0 47.0 33 41 153
24.0 38.0 37.0 3-Aug 13-Oct 5-Jun 9-Jun      
* 4th Highs are considered 99th percentile until end of year data completeness can be calculated. 
* All data is subject to change upon QA/QC by DEQ and EPA.