SmogRank / World / North America / Mexico / Mexico City
Most polluted cities in Mexico City, Mexico
1 measured city, this year; 1 above the WHO annual guideline. The only one: Mexico City at 19.6 µg/m³, #369 in the world.
About 181K people in this city breathed unhealthy air on an average day so far this year.
Ranked by people: each city's population times its share of unhealthy days, those with a daily mean over 35.4 µg/m³ (US AQI 101+). That is how many people living there breathed unhealthy air on an average day. Only cities measured at 2 or more places at least 3 km apart are ranked: one monitor shouldn't speak for a whole city. Population is the city itself, not its wider metro area.
Cities coloured by their PM2.5 over the last 24 hours. Fires, smoke and ash: Oct 5, the newest UTC day mapped.
- 1Mexico City 181K
The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales
Estimated: cities without a monitor
Mexico City cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.
| City | 7-day estimate |
|---|---|
| Iztapalapa | ≈ 11 µg/m³ |
| Gustavo Adolfo Madero | ≈ 13 µg/m³ |
| Coyoacán | ≈ 11 µg/m³ |
| Tlalpan | ≈ 11 µg/m³ |
| Cuauhtémoc | ≈ 13 µg/m³ |
| Xochimilco | ≈ 11 µg/m³ |
| Azcapotzalco | ≈ 13 µg/m³ |
| Iztacalco | ≈ 11 µg/m³ |
| Miguel Hidalgo | ≈ 13 µg/m³ |
| Benito Juarez | ≈ 11 µg/m³ |
| Tláhuac | ≈ 11 µg/m³ |
| Magdalena Contreras | ≈ 11 µg/m³ |
| Delegación Cuajimalpa de Morelos | ≈ 11 µg/m³ |
| San Miguel Topilejo | ≈ 11 µg/m³ |
| San Miguel Ajusco | ≈ 11 µg/m³ |
| San Antonio Tecómitl | ≈ 10 µg/m³ |
| San Juan Ixtayopan | ≈ 10 µg/m³ |
| Milpa Alta | ≈ 11 µg/m³ |
| San Pablo Oztotepec | ≈ 11 µg/m³ |
Bad-air episodes in Mexico City
- Southern Mexico, January 20261 January 2026, 1 day20 cities182 µg/m³peak, Tlaquepaque
- Guanajuato, México and Mexico City, Mexico, December 202425 December 2024, 1 day9 cities78 µg/m³peak, Ciudad Nezahualcoyotl
Times when many cities around here had PM2.5 at twice their usual or more on the same days.
Use this board
SmogRank, most polluted cities in Mexico City, Mexico, PM2.5, this year to 7 Oct 2026, 01:00 UTC, smogrank.com/mx/region/mexico-city?w=year.
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.
Updated 2026-10-07 01:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.