Oklahoma Department of Environmental Quality
2023 OKLAHOMA SO2
Highest 1 Hour Daily Highs (ppb) through December 28, 2023
   
Site          2023 Daily Max 1-hr Values   3 Year Avg of 99th Percentile
2020 2021 2022 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)   14.0 7.0 7.0 5.0 20 14 191
23.0 27.0 10.0 15-Jan 3-Apr 7-Dec 28-Jan      
  OKC North (1037) 13.0 3.0 1.0 1.0 1.3 1.0 226
2.0 1.0 1.0 21-Apr 23-Apr 11-Jan 6-Aug    
  Tulsa Newblock  (175) 10.0 10.0 8.0 7.0 6 6 217
7.0 5.0 6.0 23-Jan 24-Jan 26-Jan 1-Apr      
  Tulsa TCWD (235) 10.0 7.0 6.0 5.0 4 4 222
5.0 4.0 2.0 9-Apr 3-May 8-Apr 7-May    
  Tulsa Central (1127) 4.0 4.0 3.8 3.1 3 3 222
1.7 2.2 3.6 4-Aug 9-Oct 29-Jul 26-Jun      
  Tulsa Riverside (179) closed 3  
3.0 closed closed    
  Oxbow/Kremlin (555) 42.0 40.0 40.0 37.0 31 33 166
32.0 24.0 38.0 23-Apr 1-Apr 28-Aug 24-Sep      
  Fort Gibson (170) closed 11  
11.0 closed closed    
  Pryor (188)   closed 15    
15.0 closed closed      
* 4th Highs are considered 99th percentile until end of year data completeness can be calculated.