Oklahoma Department of Environmental Quality
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2018 OKLAHOMA SO2
Highest 1 Hour Daily Highs (ppb) through April 23, 2018
   
Site          2018 Daily Max 1-hr Values   3 Year Avg of 99th Percentile
2015 2016 2017 1st 2nd 3rd 4th* 15-17 Avg 16-18 Avg 2018
99th % 99th %  99th % (date) (date)  (date)  (date) 99th % 99th % Critical Value
  Ponca City  (604)   30.0 27.0 27.0 26.0 29 27 172
31.0 27.0 29.0 25-Jan 21-Jan 31-Mar 19-Jan      
  OKC (North) (1037) 3.0 3.0 3.0 2.0 2.7 2.3 223
3.0 3.0 2.0 11-Mar 12-Mar 13-Mar 1-Jan  
  Tulsa Newblock  (175) 8.0 7.0 7.0 7.0 14 13 197
11.0 17.0 14.0 30-Jan 25-Jan 26-Jan 31-Jan      
  Tulsa TCWD (235) 10.0 6.0 6.0 5.0 11 10 204
9.0 12.0 12.0 22-Jan 28-Jan 15-Mar 10-Mar  
  Tulsa Central (1127) 3.5 3.1 2.9 2.8 6 4 220
8.9 4.1 3.8 14-Mar 9-Jan 13-Jan 5-Jan      
  Tulsa Riverside (179) 4.0 4.0 3.0 3.0 6 5 217
8.0 5.0 6.0 26-Jan 28-Jan 10-Jan 13-Jan  
  Oxbow/Kremlin (555) 51.0 44.0 43.0 33.0      
new in 2017 54.0 6-Apr 1-Jan 8-Jan 16-Feb      
  Fort Gibson (170) 49.0 33.0 28.0 23.0  
new in 2017 52.0 31-Jan 20-Feb 19-Feb 19-Jan  
  Pryor (188)   34.0 27.0 26.0 25.0      
new in 2017 25.0 17-Apr 15-Feb 15-Mar 21-Jan      
* 4th Highs are considered 99th percentile until end of year data completeness can be calculated.