Most polluted cities in México, Mexico

3 measured cities ranked by PM2.5, last 7 days. Worst: San Salvador Tizatlalli at 17.8 µg/m³, #186 in the world.

#	City	µg/m³
1	San Salvador Tizatlalli México	17.8
2	Naucalpan de Juárez México	14.1
3	Ciudad Nezahualcoyotl México	11.1

Good 0–9.0Moderate 9.1+Unhealthy for sensitive groups 35.5+Unhealthy 55.5+Very unhealthy 125.5+Hazardous 225.5+No data

Estimated: cities without a monitor

México 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	Band
Tlalnepantla estimated	≈ 13 µg/m³	Moderate
Cuautitlán Izcalli estimated	≈ 13 µg/m³	Moderate
Toluca estimated	≈ 11 µg/m³	Moderate
Ciudad López Mateos estimated	≈ 13 µg/m³	Moderate
Ojo de Agua estimated	≈ 14 µg/m³	Moderate
Xico estimated	≈ 10 µg/m³	Moderate
Ixtapaluca estimated	≈ 10 µg/m³	Moderate
Nicolás Romero estimated	≈ 13 µg/m³	Moderate
Zumpango estimated	≈ 14 µg/m³	Moderate
Coacalco estimated	≈ 14 µg/m³	Moderate
Buenavista estimated	≈ 13 µg/m³	Moderate
Cuautitlán estimated	≈ 14 µg/m³	Moderate
Chicoloapan estimated	≈ 10 µg/m³	Moderate
Chalco estimated	≈ 10 µg/m³	Moderate
San Pablo de las Salinas estimated	≈ 14 µg/m³	Moderate
Huixquilucan estimated	≈ 12 µg/m³	Moderate
Texcoco de Mora estimated	≈ 10 µg/m³	Moderate
Tepexpan estimated	≈ 11 µg/m³	Moderate
Los Reyes Acaquilpan estimated	≈ 10 µg/m³	Moderate
Fuentes del Valle estimated	≈ 13 µg/m³	Moderate
Santa María Chimalhuacán estimated	≈ 10 µg/m³	Moderate
San Mateo Atenco estimated	≈ 11 µg/m³	Moderate
Tultepec estimated	≈ 14 µg/m³	Moderate
Zinacantepec estimated	≈ 11 µg/m³	Moderate
Santiago Teyahualco estimated	≈ 14 µg/m³	Moderate
Teoloyucan estimated	≈ 14 µg/m³	Moderate
San Buenaventura estimated	≈ 10 µg/m³	Moderate
Melchor Ocampo estimated	≈ 14 µg/m³	Moderate
Tepotzotlán estimated	≈ 14 µg/m³	Moderate
Santa Teresa estimated	≈ 9 µg/m³	Good
San Jerónimo Cuatro Vientos estimated	≈ 10 µg/m³	Moderate
Coyotepec estimated	≈ 14 µg/m³	Moderate
San Martín Azcatepec estimated	≈ 11 µg/m³	Moderate
San Pablo Autopan estimated	≈ 11 µg/m³	Moderate
San Isidro estimated	≈ 10 µg/m³	Moderate
Amecameca estimated	≈ 10 µg/m³	Moderate
San José Guadalupe Otzacatipan estimated	≈ 11 µg/m³	Moderate
Metepec estimated	≈ 11 µg/m³	Moderate
Tultitlán de Mariano Escobedo estimated	≈ 13 µg/m³	Moderate
San Francisco Acuautla estimated	≈ 10 µg/m³	Moderate

Updated 2026-10-01 13:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.