From Wikipedia - Reading time: 5 min
| Major cities in Kerala ordered by |
|---|
The article lists cities in Kerala according to the WHO's database on ambient (outdoor) air pollution monitoring from almost 1600 cities in 91 countries.[1][2] It includes 124 Indian cities, eight of which are from Kerala.[3][4][5][6][7][8]
| Rank | City | Particulate matter up to 10 micrometers (PM10) |
Particulate matter up to 2.5 micrometers (PM2.5) |
|---|---|---|---|
| 1 | Pathanamthitta | 23 | 10[9] |
| 2 | Kollam | 39 | 17 |
| 3 | Alappuzha | 46 | 20 |
| 4 | Trivandrum | 52 | 23 |
| 5 | Kottayam | 55 | 24 |
| 6 | Kozhikode | 57 | 25 |
| 7 | Kochi | 64 | 28 |
| 8 | Thrissur | 73 | 32 |