|
| Average daily max 8-hr O3 concentration, ppm | Average daily max 1-hr NO2 Concentration, ppm | ||
| 2019 | 2020 | 2019 | 2020 | |
| March | 0.03844 | 0.03122 | 0.037806 | 0.028094 |
| April | 0.04143 | 0.04050 | 0.030590 | 0.028197 |