| 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 | 2018-07 | 2018-06 | 2018-05 | 2018-04 | 2018-03 | 2018-02 | 2018-01 | 2017-12 | 2017-11 | 2017-10 | 2017-09 | 2017-08 | 2017-07 | 2017-06 | 2016-03 | 2016-02 | 2016-01 | 2015-12 | 2015-11 | 2015-10 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| co:ppm | 0.53 (Good) | 0.62 (Good) | 1.3 (Good) | 1.5 (Good) | 1.5 (Good) | 0.87 (Good) | 0.95 (Good) | 0.93 (Good) | 0.96 (Good) | 0.54 (Good) | 0.73 (Good) | 0.78 (Good) | 0.82 (Good) | 1.3 (Good) | 1 (Good) | 0.65 (Good) | 1.5 (Good) | 1.4 (Good) | 1.4 (Good) | 1.1 (Good) | 0.93 (Good) | 0.62 (Good) | 0.64 (Good) | 0.64 (Good) | 0.76 (Good) | 1.1 (Good) | 0.73 (Good) | 0.94 (Good) | 1.1 (Good) | 1.2 (Good) | 1.2 (Good) | 1.1 (Good) | 0.87 (Good) | 0.68 (Good) | 0.58 (Good) | 0.57 (Good) | 4.6 (Good) | 4.4 (Good) | 7.9 (Good) | 2.5 (Good) | 1.8 (Good) | - (Good) |
| no2:ppm | 0.02 (Good) | 0.02 (Good) | 0.02 (Good) | 0.03 (Good) | 0.03 (Good) | 0.04 (Good) | 0.04 (Good) | 0.03 (Good) | 0.03 (Good) | 0.02 (Good) | 0.02 (Good) | 0.02 (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) | 0.02 (Good) | 0.02 (Good) | 0.02 (Good) | 0.04 (Good) | 0.04 (Good) | 0.03 (Good) | 0.02 (Good) | 0.02 (Good) | 0.02 (Good) | 0.01 (Good) | 0.02 (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) |
| pm10 | 27 (Moderate) | 39 (Moderate) | 37 (Moderate) | 70 (Unhealthy for Sensitive Groups) | 68 (Unhealthy for Sensitive Groups) | 68 (Unhealthy for Sensitive Groups) | 62 (Unhealthy for Sensitive Groups) | 49 (Moderate) | 42 (Moderate) | 24 (Moderate) | 36 (Moderate) | 30 (Moderate) | 44 (Moderate) | 34 (Moderate) | 44 (Moderate) | 47 (Moderate) | 89 (Unhealthy) | 81 (Unhealthy) | 84 (Unhealthy) | 48 (Moderate) | 37 (Moderate) | 33 (Moderate) | 36 (Moderate) | 33 (Moderate) | 37 (Moderate) | 46 (Moderate) | 50 (Unhealthy for Sensitive Groups) | 71 (Unhealthy for Sensitive Groups) | 71 (Unhealthy for Sensitive Groups) | 68 (Unhealthy for Sensitive Groups) | 63 (Unhealthy for Sensitive Groups) | 48 (Moderate) | 35 (Moderate) | 28 (Moderate) | 25 (Moderate) | 33 (Moderate) | 22 (Moderate) | 23 (Moderate) | 22 (Moderate) | 21 (Moderate) | 18 (Good) | 18 (Good) |
| so2:ppm | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | 0 (Good) | 0 (Good) | 0 (Good) | 0 (Good) | 0.01 (Good) | - (Good) |
| o3:ppm | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | - (Good) | 0.02 (Good) | 0.01 (Good) | 0.01 (Good) | 0.01 (Good) | 0.01 (Good) |
Lat Phrao Rd., Wang Thonglang
| 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 | 2018-07 | 2018-06 | 2018-05 | 2018-04 | 2018-03 | 2018-02 | 2018-01 | 2017-12 | 2017-11 | 2017-10 | 2017-09 | 2017-08 | 2017-07 | 2017-06 | 2016-03 | 2016-02 | 2016-01 | 2015-12 | 2015-11 | 2015-10 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| o3:ppm | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 0.02 | 0.01 | 0.01 | 0.01 | 0.01 |
| pm10 | 27 | 39 | 37 | 70 | 68 | 68 | 62 | 49 | 42 | 24 | 36 | 30 | 44 | 34 | 44 | 47 | 89 | 81 | 84 | 48 | 37 | 33 | 36 | 33 | 37 | 46 | 50 | 71 | 71 | 68 | 63 | 48 | 35 | 28 | 25 | 33 | 22 | 23 | 22 | 21 | 18 | 18 |
| so2:ppm | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 0 | 0 | 0 | 0 | 0.01 | - |
| co:ppm | 0.53 | 0.62 | 1.3 | 1.5 | 1.5 | 0.87 | 0.95 | 0.93 | 0.96 | 0.54 | 0.73 | 0.78 | 0.82 | 1.3 | 1 | 0.65 | 1.5 | 1.4 | 1.4 | 1.1 | 0.93 | 0.62 | 0.64 | 0.64 | 0.76 | 1.1 | 0.73 | 0.94 | 1.1 | 1.2 | 1.2 | 1.1 | 0.87 | 0.68 | 0.58 | 0.57 | 4.6 | 4.4 | 7.9 | 2.5 | 1.8 | - |
| no2:ppm | 0.02 | 0.02 | 0.02 | 0.03 | 0.03 | 0.04 | 0.04 | 0.03 | 0.03 | 0.02 | 0.02 | 0.02 | 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 | 0.02 | 0.02 | 0.02 | 0.04 | 0.04 | 0.03 | 0.02 | 0.02 | 0.02 | 0.01 | 0.02 | - | - | - | - | - | - |