| index | 2017-03 | 2017-02 | 2017-01 | 2016-12 | 2016-11 | 2016-10 | 2016-09 | 2016-08 | 2016-07 | 2016-06 | 2016-05 | 2016-04 | 2016-03 | 2016-02 | 2016-01 | 2015-12 | 2015-11 | 2015-10 | 2015-09 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| pm10 | 33 (Moderate) | 54 (Unhealthy for Sensitive Groups) | 36 (Moderate) | 31 (Moderate) | 40 (Moderate) | 38 (Moderate) | 52 (Unhealthy for Sensitive Groups) | 58 (Unhealthy for Sensitive Groups) | 66 (Unhealthy for Sensitive Groups) | 85 (Unhealthy) | 58 (Unhealthy for Sensitive Groups) | 47 (Moderate) | 43 (Moderate) | 34 (Moderate) | 35 (Moderate) | 28 (Moderate) | 30 (Moderate) | 30 (Moderate) | 28 (Moderate) |
| o3 | 33 (Good) | 21 (Good) | 18 (Good) | 22 (Good) | 24 (Good) | 27 (Good) | 29 (Good) | 26 (Good) | 25 (Good) | 16 (Good) | 19 (Good) | 19 (Good) | 18 (Good) | 19 (Good) | 19 (Good) | 20 (Good) | 26 (Good) | 31 (Good) | 29 (Good) |
| co | 967 (Good) | 955 (Good) | 1 (Good) | 1 (Good) | 1 (Good) | 1 (Good) | 1 (Good) | 1 (Good) | 1 (Good) | 1 (Good) | 2 (Good) | 960 (Good) | 134 (Good) | 1 (Good) | 1 (Good) | 1 (Good) | 1 (Good) | 1 (Good) | 2 (Good) |
| no2 | 14 (Good) | 17 (Good) | 5.8 (Good) | 20 (Good) | 9.1 (Good) | 12 (Good) | 15 (Good) | 17 (Good) | 19 (Good) | 25 (Good) | 16 (Good) | 17 (Good) | 14 (Good) | 7.2 (Good) | 9.1 (Good) | 5.9 (Good) | 9.3 (Good) | 11 (Good) | 12 (Good) |
| so2 | 14 (Good) | 9.7 (Good) | 7.5 (Good) | 9.3 (Good) | 9.2 (Good) | 6.3 (Good) | 8.9 (Good) | 10 (Good) | 13 (Good) | 19 (Good) | 17 (Good) | 12 (Good) | 14 (Good) | 8.1 (Good) | 10 (Good) | 6.1 (Good) | 8.6 (Good) | 8.2 (Good) | 9.3 (Good) |
Lota rural
| index | 2017-03 | 2017-02 | 2017-01 | 2016-12 | 2016-11 | 2016-10 | 2016-09 | 2016-08 | 2016-07 | 2016-06 | 2016-05 | 2016-04 | 2016-03 | 2016-02 | 2016-01 | 2015-12 | 2015-11 | 2015-10 | 2015-09 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| co | 967 | 955 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 960 | 134 | 1 | 1 | 1 | 1 | 1 | 2 |
| pm10 | 33 | 54 | 36 | 31 | 40 | 38 | 52 | 58 | 66 | 85 | 58 | 47 | 43 | 34 | 35 | 28 | 30 | 30 | 28 |
| o3 | 33 | 21 | 18 | 22 | 24 | 27 | 29 | 26 | 25 | 16 | 19 | 19 | 18 | 19 | 19 | 20 | 26 | 31 | 29 |
| so2 | 14 | 9.7 | 7.5 | 9.3 | 9.2 | 6.3 | 8.9 | 10 | 13 | 19 | 17 | 12 | 14 | 8.1 | 10 | 6.1 | 8.6 | 8.2 | 9.3 |
| no2 | 14 | 17 | 5.8 | 20 | 9.1 | 12 | 15 | 17 | 19 | 25 | 16 | 17 | 14 | 7.2 | 9.1 | 5.9 | 9.3 | 11 | 12 |