|
Oklahoma Department of Environmental Quality | ||||||||||||||||
| NO2 through December 31, 2020 | |||||||||||||||||
| One hour daily maximum (ppb) | |||||||||||||||||
| Site | 2017 | 2018 | 2019 | 1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th | 17-19 Avg | 18-20 Avg | 2020 | |||
| 98th % | 98th % | 98th % | (date) | (date) | (date) | (date) | (date) | (date) | (date) | (date) | 98% | 98% | Critical Value | ||||
| OKC Near Road (097) | 48.0 | 47.0 | 45.0 | 44.0 | 44.0 | 43.0 | 43.0 | 43.0 | 41.3 | 40.7 | 224.0 | ||||||
| 45.0 | 40.0 | 39.0 | 17-Nov | 10-Dec | 17-Nov | 5-Nov | 16-Nov | 5-Nov | 5-Nov | 17-Nov | |||||||
| OKC North (1037) | 39.0 | 37.0 | 37.0 | 37.0 | 37.0 | 36.0 | 36.0 | 36.0 | |||||||||
| (new in 2018) | 33.0 | 16-Nov | 27-Jan | 16-Nov | 16-Nov | 9-Dec | 15-Nov | 17-Nov | 7-Dec | ||||||||
| Tulsa Central (1127) | 41.9 | 40.8 | 38.1 | 37.4 | 37.4 | 37.1 | 35.2 | 35.0 | 37.1 | 36.6 | 228.3 | ||||||
| 36.5 | 38.4 | 36.3 | 27-Jan | 9-Dec | 3-Mar | 6-Mar | 11-Mar | 9-Dec | 1-Feb | 28-Feb | |||||||
| 8th Highs are considered 98th percentile until end of year data completeness can be calculated. | |||||||||||||||||