| index | 2020-05 | 2020-04 | 2020-03 | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| no2 | 28 (Good) | 28 (Good) | 27 (Good) | 27 (Good) | 30 (Good) | 13 (Good) | 18 (Good) | 16 (Good) | 14 (Good) | 17 (Good) | 14 (Good) | 15 (Good) | 21 (Good) | 25 (Good) | 30 (Good) | 35 (Good) | 19 (Good) | 27 (Good) | 14 (Good) | 15 (Good) | 14 (Good) | 12 (Good) | 19 (Good) | 15 (Good) | 17 (Good) | 26 (Good) | 26 (Good) | 43 (Moderate) | 16 (Good) | 16 (Good) |
| so2 | 35 (Good) | 35 (Good) | 32 (Good) | 26 (Good) | 42 (Good) | 4.7 (Good) | 3.5 (Good) | 2.3 (Good) | 1.9 (Good) | 2.4 (Good) | 2.7 (Good) | 5.1 (Good) | 20 (Good) | 43 (Good) | 52 (Moderate) | 61 (Moderate) | 46 (Good) | 6.5 (Good) | 2.4 (Good) | 1.6 (Good) | 1.4 (Good) | 2.1 (Good) | 2.1 (Good) | 2.8 (Good) | 8.7 (Good) | 20 (Good) | 22 (Good) | 20 (Good) | 3.5 (Good) | 2.7 (Good) |
| pm10 | 115 (Very Unhealthy) | 116 (Very Unhealthy) | 110 (Very Unhealthy) | 96 (Unhealthy) | 112 (Very Unhealthy) | 71 (Unhealthy for Sensitive Groups) | 80 (Unhealthy for Sensitive Groups) | 69 (Unhealthy for Sensitive Groups) | 61 (Unhealthy for Sensitive Groups) | 84 (Unhealthy) | 100 (Unhealthy) | 118 (Very Unhealthy) | 102 (Unhealthy) | 150 (Very bad Hazardous) | 154 (Very bad Hazardous) | 139 (Very Unhealthy) | 147 (Very Unhealthy) | 91 (Unhealthy) | 67 (Unhealthy for Sensitive Groups) | 88 (Unhealthy) | 81 (Unhealthy) | 80 (Unhealthy for Sensitive Groups) | 91 (Unhealthy) | 78 (Unhealthy for Sensitive Groups) | 79 (Unhealthy for Sensitive Groups) | 90 (Unhealthy) | 91 (Unhealthy) | 121 (Very Unhealthy) | 67 (Unhealthy for Sensitive Groups) | 147 (Very Unhealthy) |
Дархан
| index | 2020-05 | 2020-04 | 2020-03 | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| no2 | 28 | 28 | 27 | 27 | 30 | 13 | 18 | 16 | 14 | 17 | 14 | 15 | 21 | 25 | 30 | 35 | 19 | 27 | 14 | 15 | 14 | 12 | 19 | 15 | 17 | 26 | 26 | 43 | 16 | 16 |
| so2 | 35 | 35 | 32 | 26 | 42 | 4.7 | 3.5 | 2.3 | 1.9 | 2.4 | 2.7 | 5.1 | 20 | 43 | 52 | 61 | 46 | 6.5 | 2.4 | 1.6 | 1.4 | 2.1 | 2.1 | 2.8 | 8.7 | 20 | 22 | 20 | 3.5 | 2.7 |
| pm10 | 115 | 116 | 110 | 96 | 112 | 71 | 80 | 69 | 61 | 84 | 100 | 118 | 102 | 150 | 154 | 139 | 147 | 91 | 67 | 88 | 81 | 80 | 91 | 78 | 79 | 90 | 91 | 121 | 67 | 147 |