Most polluted cities in Mexico

41 measured cities ranked by PM2.5, last 30 days. Worst: San Luis Potosí at 31.7 µg/m³, #79 in the world.

#	City	µg/m³
1	San Luis Potosí San Luis Potosí	31.7
2	Tuxtla Chiapas	29.1
3	Hacienda Santa Fe Jalisco	24.0
4	San Salvador Tizatlalli México	19.3
5	Ciudad Nezahualcoyotl México	18.0
6	Naucalpan de Juárez México	17.9
7	Santa Anita Jalisco	17.8
8	Aguascalientes Aguascalientes	17.8
9	Guadalajara Jalisco	17.5
10	Saltillo Coahuila	17.3
11	Puebla Puebla	15.5
12	Mexico City Mexico City	14.9
13	Parque Industrial Ciudad Mitras Nuevo León	14.7
14	Tlaquepaque Jalisco	14.5
15	Ciudad General Escobedo Nuevo León	14.5
16	Celaya Guanajuato	14.3
17	Salamanca Guanajuato	14.1
18	León de los Aldama Guanajuato	13.5
19	Irapuato Guanajuato	13.0
20	Monterrey Nuevo León	12.8
21	Tijuana Baja California	12.5
22	Santa Catarina Nuevo León	12.3
23	San Luis de la Paz Guanajuato	12.1
24	Tulancingo Hidalgo	11.9
25	Zapopan Jalisco	11.7
26	Ciudad Apodaca Nuevo León	11.7
27	Tepic Nayarit	11.6
28	Mexicali Baja California	11.5
29	Cuautla Morelos	11.4
30	Santiago de Querétaro Querétaro	11.1
31	Ciudad Benito Juárez Nuevo León	11.1
32	San Juan del Río Querétaro	10.8
33	Cadereyta Jiménez Nuevo León	10.5
34	La Providencia Siglo XXI Hidalgo	9.0
35	Pachuca de Soto Hidalgo	8.8
36	García Nuevo León	8.8
37	San Miguel de Allende Guanajuato	8.8
38	Abasolo Guanajuato	8.6
39	Zacatepec de Hidalgo Morelos	8.0
40	Tula de Allende Hidalgo	7.9
41	Ciudad Juárez Chihuahua	7.0

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

Mexico 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
Iztapalapa estimated	≈ 12 µg/m³	Moderate
Gustavo Adolfo Madero estimated	≈ 13 µg/m³	Moderate
Chihuahua estimated	≈ 7 µg/m³	Good
Cancún estimated	≈ 5 µg/m³	Good
Hermosillo estimated	≈ 4 µg/m³	Good
Culiacán estimated	≈ 12 µg/m³	Moderate
Morelia estimated	≈ 19 µg/m³	Moderate
Torreón estimated	≈ 7 µg/m³	Good
Guadalupe estimated	≈ 7 µg/m³	Good
Acapulco de Juárez estimated	≈ 6 µg/m³	Good
Tlalnepantla estimated	≈ 13 µg/m³	Moderate
Coyoacán estimated	≈ 12 µg/m³	Moderate
Reynosa estimated	≈ 8 µg/m³	Good
Tlalpan estimated	≈ 12 µg/m³	Moderate
Cuautitlán Izcalli estimated	≈ 13 µg/m³	Moderate
Cuauhtémoc estimated	≈ 13 µg/m³	Moderate
Heroica Matamoros estimated	≈ 9 µg/m³	Good
Toluca estimated	≈ 11 µg/m³	Moderate
Ciudad López Mateos estimated	≈ 13 µg/m³	Moderate
Ensenada estimated	≈ 11 µg/m³	Moderate
Xochimilco estimated	≈ 12 µg/m³	Moderate
Veracruz estimated	≈ 8 µg/m³	Good
Xalapa de Enríquez estimated	≈ 11 µg/m³	Moderate
Nuevo Laredo estimated	≈ 8 µg/m³	Good
Azcapotzalco estimated	≈ 13 µg/m³	Moderate
San Nicolás de los Garza estimated	≈ 7 µg/m³	Good
Tonalá estimated	≈ 20 µg/m³	Moderate
Ojo de Agua estimated	≈ 14 µg/m³	Moderate
Xico estimated	≈ 10 µg/m³	Moderate
Iztacalco estimated	≈ 12 µg/m³	Moderate
Mazatlán estimated	≈ 8 µg/m³	Good
Miguel Hidalgo estimated	≈ 12 µg/m³	Moderate
Benito Juarez estimated	≈ 12 µg/m³	Moderate
Tapachula estimated	≈ 14 µg/m³	Moderate
Villahermosa estimated	≈ 15 µg/m³	Moderate
Ciudad Victoria estimated	≈ 5 µg/m³	Good
Soledad de Graciano Sánchez estimated	≈ 8 µg/m³	Good
Ciudad Obregón estimated	≈ 8 µg/m³	Good
Ixtapaluca estimated	≈ 10 µg/m³	Moderate
Coatzacoalcos estimated	≈ 6 µg/m³	Good

Regions

Aguascalientes 1 Baja California 2 Chiapas 1 Chihuahua 1 Coahuila 1 Guanajuato 7 Hidalgo 4 Jalisco 5 México 3 Mexico City 1 Morelos 2 Nayarit 1 Nuevo León 8 Puebla 1 Querétaro 2 San Luis Potosí 1

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