| index | 2020-05 | 2020-04 | 2020-03 | 2020-02 | 2020-01 | 2019-12 | 2019-11 | 2019-10 | 2019-09 | 2019-08 | 2019-07 | 2019-06 | 2019-05 | 2019-04 | 2019-03 | 2019-02 | 2019-01 | 2018-12 | 2018-11 | 2018-10 | 2018-09 | 2018-08 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| co:ppm | 0.35 (Good) | 0.51 (Good) | 0.57 (Good) | 0.56 (Good) | 0.63 (Good) | 0.58 (Good) | 0.5 (Good) | 0.63 (Good) | 0.42 (Good) | 0.35 (Good) | 0.29 (Good) | 0.35 (Good) | 0.52 (Good) | 0.66 (Good) | 0.74 (Good) | 0.61 (Good) | 0.56 (Good) | 0.51 (Good) | 0.45 (Good) | 0.49 (Good) | 0.44 (Good) | 0.39 (Good) |
| no2:ppm | 0.01 (Good) | 0.01 (Good) | 0.02 (Good) | 0.02 (Good) | 0.02 (Good) | 0.02 (Good) | 0.02 (Good) | 0.01 (Good) | 0.01 (Good) | 0.01 (Good) | 0.01 (Good) | 0.01 (Good) | 0.01 (Good) | 0.02 (Good) | 0.03 (Good) | 0.03 (Good) | 0.02 (Good) | 0.02 (Good) | 0.01 (Good) | 0.01 (Good) | 0.01 (Good) | 0.01 (Good) |
| o3:ppm | 0.03 (Good) | 0.04 (Good) | 0.04 (Good) | 0.03 (Good) | 0.03 (Good) | 0.02 (Good) | 0.02 (Good) | 0.03 (Good) | 0.02 (Good) | 0.02 (Good) | 0.02 (Good) | 0.02 (Good) | 0.04 (Good) | 0.04 (Good) | 0.04 (Good) | 0.03 (Good) | 0.02 (Good) | 0.02 (Good) | 0.02 (Good) | 0.02 (Good) | 0.02 (Good) | 0.01 (Good) |
| so2:ppm | 0 (Good) | 0 (Good) | 0 (Good) | 0 (Good) | 0 (Good) | 0 (Good) | 0 (Good) | 0.01 (Good) | 0 (Good) | 0 (Good) | 0 (Good) | 0 (Good) | 0 (Good) | 0 (Good) | 0 (Good) | 0 (Good) | 0 (Good) | 0 (Good) | 0 (Good) | 0 (Good) | 0 (Good) | 0 (Good) |
| pm10 | 32 (Moderate) | 71 (Unhealthy for Sensitive Groups) | 76 (Unhealthy for Sensitive Groups) | 62 (Unhealthy for Sensitive Groups) | 60 (Unhealthy for Sensitive Groups) | 73 (Unhealthy for Sensitive Groups) | 47 (Moderate) | 40 (Moderate) | 31 (Moderate) | 25 (Moderate) | 22 (Moderate) | 23 (Moderate) | 59 (Unhealthy for Sensitive Groups) | 100 (Unhealthy) | 117 (Very Unhealthy) | 86 (Unhealthy) | 57 (Unhealthy for Sensitive Groups) | 47 (Moderate) | 41 (Moderate) | 35 (Moderate) | 30 (Moderate) | 30 (Moderate) |
Wiang Yong, Mueang
| index | 2020-05 | 2020-04 | 2020-03 | 2020-02 | 2020-01 | 2019-12 | 2019-11 | 2019-10 | 2019-09 | 2019-08 | 2019-07 | 2019-06 | 2019-05 | 2019-04 | 2019-03 | 2019-02 | 2019-01 | 2018-12 | 2018-11 | 2018-10 | 2018-09 | 2018-08 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| co:ppm | 0.35 | 0.51 | 0.57 | 0.56 | 0.63 | 0.58 | 0.5 | 0.63 | 0.42 | 0.35 | 0.29 | 0.35 | 0.52 | 0.66 | 0.74 | 0.61 | 0.56 | 0.51 | 0.45 | 0.49 | 0.44 | 0.39 |
| no2:ppm | 0.01 | 0.01 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.02 | 0.03 | 0.03 | 0.02 | 0.02 | 0.01 | 0.01 | 0.01 | 0.01 |
| o3:ppm | 0.03 | 0.04 | 0.04 | 0.03 | 0.03 | 0.02 | 0.02 | 0.03 | 0.02 | 0.02 | 0.02 | 0.02 | 0.04 | 0.04 | 0.04 | 0.03 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.01 |
| so2:ppm | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.01 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| pm10 | 32 | 71 | 76 | 62 | 60 | 73 | 47 | 40 | 31 | 25 | 22 | 23 | 59 | 100 | 117 | 86 | 57 | 47 | 41 | 35 | 30 | 30 |