年份 | 有效天数 | 优、良 | 重度污染 | ||
天数 | 占比 | 天数 | 占比 | ||
2016 | 366 | 198 | 54.1% | 39 | 10.7% |
2017 | 365 | 226 | 62.1% | 23 | 6.3% |
2018 | 365 | 227 | 62.2% | 15 | 4.1% |
2019 | 365 | 240 | 65.8% | 4 | 1.1% |
2020 | 366 | 276 | 75.4% | 10 | 2.7% |
2021 | 365 | 288 | 78.9% | 8 | 2.2% |
2022 | 365 | 286 | 78.4% | 3 | 0.8% |