Oklahoma Department of Environmental Quality
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2014 2019 OKLAHOMA Carbon Monoxide
Highest 8 Hour Averages (ppm) through March 18, 2019
Site  2014 2015 2016 2017 2018 2019
  1st 2nd 1st 2nd 1st 2nd 1st 2nd 1st 2nd 1st 2nd
Tulsa 1.0 0.9 1.2 1.1 1.9 1.6 1.0 1.0 1.1 1.0 0.8 0.8
Site 1127 9-Dec 12-Jan 20-Jan 27-Jan 22-Jul 22-Jul 2-Jan 11-Jan 9-Jan 16-Dec 8-Jan 27-Jan
                         
OKC 0.7 0.7 2.0 0.9 0.9 0.9 0.8 0.8 0.9 0.8 0.6 0.5
Site 1037 26-Jan 9-Dec 3-Mar 3-Mar 14-Jan 27-Jan 7-Jan 10-Jan 10-Dec 11-Dec 10-Jan 29-Jan
                         
OKC Near Road new in 2015 1.1 0.9 1.1 1.1 1.3 1.3 1.6 1.6 1.1 1.0
Site 0097 4-Dec 28-Aug 15-Nov 26-Nov 11-Jan 10-Dec 4-Jan 29-Nov 9-Jan 5-Jan