| Year | SO2 Median (ppb) | SO2 10th Percentile (ppb) | SO2 90th Percentile (ppb) | Coal (MM Tons) | Oil (MM Tons) |
| 2020 | 32.6 | 8 | 71.6 | 922 | 649 |
| 2021 | 43.04 | 14.4 | 100 | 984 | 575 |
| 2022 | 23.87 | 5 | 59 | 814 | 740 |
| 2023 | 109.8 | 32 | 172 | 938 | 510 |
| 2024 | 83.01 | 26 | 163 | 974 | 518 |
| 2025 | 78.74 | 16 | 158 | 1026 | 489 |
| 2026 | 14.56 | 3.8 | 17 | 686 | 835 |
| 2027 | 87.48 | 29 | 203 | 1023 | 531 |
| 2028 | 54.83 | 17 | 111 | 1063 | 546 |
| 2029 | 12.68 | 3 | 34 | 640 | 920 |