SmogRank / Mexico / Mexico City

Air quality in Mexico City

Mexico City, Mexico. PM2.5 from 12 reference monitors, updated hourly.

19.0 µg/m³
Moderate

Latest hour (09:00 UTC), 1.3× the WHO 24-hour guideline.

Rank

24 h
–
not enough data
7 days
#600
of 2,333 · 9.5 µg/m³
30 days
#234
of 2,331 · 14.9 µg/m³
Year
#229
of 2,173 · 20.0 µg/m³

Why it ranks here

Cleaner than usual. The last 7 days averaged 9.5 µg/m³, well below its typical 19.7; rain or wind often clears the air for a while.

Based on Mexico City's own measurements; causes are the usual kinds for a pattern like this, not a confirmed source.

Last 4 days, hour by hour

15302026-09-30 23:00 UTC: 11.0 µg/m³2026-10-01 00:00 UTC: 15.0 µg/m³2026-10-01 01:00 UTC: 19.0 µg/m³2026-10-01 02:00 UTC: 16.0 µg/m³2026-10-01 03:00 UTC: 14.0 µg/m³2026-10-01 04:00 UTC: 17.0 µg/m³2026-10-01 05:00 UTC: 18.0 µg/m³2026-10-01 06:00 UTC: 17.0 µg/m³2026-10-01 07:00 UTC: 18.0 µg/m³2026-10-01 08:00 UTC: 18.0 µg/m³2026-10-01 09:00 UTC: 19.0 µg/m³Sep 28Sep 29Sep 30Oct 1

Times in UTC. Dashed line: WHO 24-hour guideline (15 µg/m³).

Every day for a year

SepNovDecJanFebMarAprMayJunJulAugSepMonWedFri2025-09-29: 9.9 µg/m³2025-09-30: 19.3 µg/m³2025-10-01: 21.8 µg/m³2025-10-02: 19.3 µg/m³2025-10-03: 10.0 µg/m³2025-10-04: 23.3 µg/m³2025-10-05: 13.4 µg/m³2025-10-06: 12.8 µg/m³2025-10-07: 11.4 µg/m³2025-10-08: 5.8 µg/m³2025-10-09: 8.7 µg/m³2025-10-10: 10.9 µg/m³2025-10-11: 7.8 µg/m³2025-10-12: 14.9 µg/m³2025-10-13: 10.6 µg/m³2025-10-14: 13.6 µg/m³2025-10-15: 9.8 µg/m³2025-10-16: 21.0 µg/m³2025-10-17: 25.3 µg/m³2025-10-18: 23.3 µg/m³2025-10-19: 15.8 µg/m³2025-10-20: 16.0 µg/m³2025-10-21: 16.4 µg/m³2025-10-22: 8.4 µg/m³2025-10-23: 13.1 µg/m³2025-10-24: 20.5 µg/m³2025-10-25: 20.3 µg/m³2025-10-26: 16.5 µg/m³2025-10-27: 14.5 µg/m³2025-10-28: 16.3 µg/m³2025-10-29: 11.3 µg/m³2025-10-30: 21.5 µg/m³2025-10-31: 18.5 µg/m³2025-11-01: 20.7 µg/m³2025-11-02: 24.9 µg/m³2025-11-03: 15.7 µg/m³2025-11-04: 23.3 µg/m³2025-11-05: 27.7 µg/m³2025-11-06: 17.1 µg/m³2025-11-07: 28.3 µg/m³2025-11-08: 28.6 µg/m³2025-11-09: 18.1 µg/m³2025-11-10: 10.5 µg/m³2025-11-11: 20.3 µg/m³2025-11-12: 29.3 µg/m³2025-11-13: 23.0 µg/m³2025-11-14: 22.7 µg/m³2025-11-15: 23.3 µg/m³2025-11-16: 24.3 µg/m³2025-11-17: 20.1 µg/m³2025-11-18: 25.2 µg/m³2025-11-19: 19.1 µg/m³2025-11-20: 29.8 µg/m³2025-11-21: 34.8 µg/m³2025-11-22: 26.6 µg/m³2025-11-23: 20.4 µg/m³2025-11-24: 23.9 µg/m³2025-11-25: 29.0 µg/m³2025-11-26: 27.9 µg/m³2025-11-27: 12.4 µg/m³2025-11-28: 10.2 µg/m³2025-11-29: 25.3 µg/m³2025-11-30: 29.5 µg/m³2025-12-01: 24.6 µg/m³2025-12-02: 25.6 µg/m³2025-12-03: 26.6 µg/m³2025-12-04: 24.6 µg/m³2025-12-05: 23.0 µg/m³2025-12-06: 24.2 µg/m³2025-12-07: 25.1 µg/m³2025-12-08: 14.9 µg/m³2025-12-09: 25.7 µg/m³2025-12-10: 24.2 µg/m³2025-12-11: 14.3 µg/m³2025-12-12: 26.9 µg/m³2025-12-13: 22.7 µg/m³2025-12-14: 16.3 µg/m³2025-12-15: 6.4 µg/m³2025-12-16: 17.9 µg/m³2025-12-17: 24.2 µg/m³2025-12-18: 25.6 µg/m³2025-12-19: 24.5 µg/m³2025-12-20: 31.6 µg/m³2025-12-21: 25.2 µg/m³2025-12-22: 21.9 µg/m³2025-12-23: 17.2 µg/m³2025-12-24: 26.2 µg/m³2025-12-25: 40.5 µg/m³2025-12-26: 23.6 µg/m³2025-12-27: 26.2 µg/m³2025-12-28: 27.3 µg/m³2025-12-29: 18.9 µg/m³2025-12-30: 9.0 µg/m³2025-12-31: 29.9 µg/m³2026-01-01: 70.1 µg/m³2026-01-02: no data2026-01-03: 28.7 µg/m³2026-01-04: 22.9 µg/m³2026-01-05: 34.8 µg/m³2026-01-06: 31.2 µg/m³2026-01-07: 28.5 µg/m³2026-01-08: 28.7 µg/m³2026-01-09: no data2026-01-10: no data2026-01-11: no data2026-01-12: no data2026-01-13: 18.2 µg/m³2026-01-14: 21.4 µg/m³2026-01-15: 18.6 µg/m³2026-01-16: 29.0 µg/m³2026-01-17: 21.3 µg/m³2026-01-18: 22.2 µg/m³2026-01-19: 29.8 µg/m³2026-01-20: 29.6 µg/m³2026-01-21: 29.4 µg/m³2026-01-22: 17.5 µg/m³2026-01-23: 16.0 µg/m³2026-01-24: 13.4 µg/m³2026-01-25: 9.3 µg/m³2026-01-26: 17.2 µg/m³2026-01-27: 24.7 µg/m³2026-01-28: 25.8 µg/m³2026-01-29: 25.1 µg/m³2026-01-30: 32.3 µg/m³2026-01-31: 35.5 µg/m³2026-02-01: 35.0 µg/m³2026-02-02: 30.0 µg/m³2026-02-03: 27.4 µg/m³2026-02-04: 26.3 µg/m³2026-02-05: 23.7 µg/m³2026-02-06: 31.2 µg/m³2026-02-07: 17.1 µg/m³2026-02-08: 21.7 µg/m³2026-02-09: 25.6 µg/m³2026-02-10: 30.0 µg/m³2026-02-11: 36.2 µg/m³2026-02-12: 34.3 µg/m³2026-02-13: 28.3 µg/m³2026-02-14: 36.0 µg/m³2026-02-15: 34.6 µg/m³2026-02-16: 33.4 µg/m³2026-02-17: 32.3 µg/m³2026-02-18: 26.5 µg/m³2026-02-19: 27.3 µg/m³2026-02-20: 28.3 µg/m³2026-02-21: 24.3 µg/m³2026-02-22: 10.9 µg/m³2026-02-23: 12.8 µg/m³2026-02-24: 19.7 µg/m³2026-02-25: 22.6 µg/m³2026-02-26: 30.1 µg/m³2026-02-27: 25.8 µg/m³2026-02-28: 14.8 µg/m³2026-03-01: 17.8 µg/m³2026-03-02: 19.5 µg/m³2026-03-03: 27.4 µg/m³2026-03-04: 27.5 µg/m³2026-03-05: 22.8 µg/m³2026-03-06: 24.3 µg/m³2026-03-07: 29.0 µg/m³2026-03-08: 29.8 µg/m³2026-03-09: 37.1 µg/m³2026-03-10: 36.3 µg/m³2026-03-11: 30.8 µg/m³2026-03-12: 12.4 µg/m³2026-03-13: 20.2 µg/m³2026-03-14: 18.4 µg/m³2026-03-15: 22.8 µg/m³2026-03-16: 21.2 µg/m³2026-03-17: 23.0 µg/m³2026-03-18: 21.9 µg/m³2026-03-19: 19.7 µg/m³2026-03-20: 20.1 µg/m³2026-03-21: 13.0 µg/m³2026-03-22: 16.6 µg/m³2026-03-23: 18.8 µg/m³2026-03-24: 21.8 µg/m³2026-03-25: 19.6 µg/m³2026-03-26: 19.6 µg/m³2026-03-27: 17.3 µg/m³2026-03-28: 9.9 µg/m³2026-03-29: 10.9 µg/m³2026-03-30: 14.9 µg/m³2026-03-31: 10.6 µg/m³2026-04-01: 20.4 µg/m³2026-04-02: 24.4 µg/m³2026-04-03: 20.1 µg/m³2026-04-04: 17.3 µg/m³2026-04-05: 10.7 µg/m³2026-04-06: 11.1 µg/m³2026-04-07: 20.5 µg/m³2026-04-08: 22.6 µg/m³2026-04-09: 15.7 µg/m³2026-04-10: 20.7 µg/m³2026-04-11: 24.7 µg/m³2026-04-12: 19.5 µg/m³2026-04-13: 13.7 µg/m³2026-04-14: 13.7 µg/m³2026-04-15: 15.8 µg/m³2026-04-16: 20.9 µg/m³2026-04-17: 21.3 µg/m³2026-04-18: 20.4 µg/m³2026-04-19: 13.7 µg/m³2026-04-20: 19.1 µg/m³2026-04-21: 20.4 µg/m³2026-04-22: 17.5 µg/m³2026-04-23: 17.7 µg/m³2026-04-24: 19.9 µg/m³2026-04-25: 24.3 µg/m³2026-04-26: 18.5 µg/m³2026-04-27: 18.9 µg/m³2026-04-28: 17.1 µg/m³2026-04-29: 17.7 µg/m³2026-04-30: 17.7 µg/m³2026-05-01: 27.4 µg/m³2026-05-02: 31.9 µg/m³2026-05-03: 21.0 µg/m³2026-05-04: 27.3 µg/m³2026-05-05: 27.8 µg/m³2026-05-06: no data2026-05-07: 25.3 µg/m³2026-05-08: 24.2 µg/m³2026-05-09: 20.7 µg/m³2026-05-10: 26.1 µg/m³2026-05-11: 26.2 µg/m³2026-05-12: 18.3 µg/m³2026-05-13: 31.8 µg/m³2026-05-14: 15.8 µg/m³2026-05-15: 19.5 µg/m³2026-05-16: 23.0 µg/m³2026-05-17: 24.5 µg/m³2026-05-18: 27.5 µg/m³2026-05-19: 24.9 µg/m³2026-05-20: 17.4 µg/m³2026-05-21: 21.1 µg/m³2026-05-22: 26.6 µg/m³2026-05-23: 27.4 µg/m³2026-05-24: 22.1 µg/m³2026-05-25: 20.8 µg/m³2026-05-26: 19.2 µg/m³2026-05-27: 23.7 µg/m³2026-05-28: 14.5 µg/m³2026-05-29: 15.2 µg/m³2026-05-30: 18.9 µg/m³2026-05-31: 25.2 µg/m³2026-06-01: 21.4 µg/m³2026-06-02: 23.3 µg/m³2026-06-03: 21.9 µg/m³2026-06-04: 12.7 µg/m³2026-06-05: 23.7 µg/m³2026-06-06: 19.5 µg/m³2026-06-07: 15.3 µg/m³2026-06-08: 11.3 µg/m³2026-06-09: 13.5 µg/m³2026-06-10: 13.6 µg/m³2026-06-11: 15.9 µg/m³2026-06-12: 10.1 µg/m³2026-06-13: 16.0 µg/m³2026-06-14: 12.0 µg/m³2026-06-15: 9.4 µg/m³2026-06-16: 12.7 µg/m³2026-06-17: 14.4 µg/m³2026-06-18: 21.7 µg/m³2026-06-19: 26.6 µg/m³2026-06-20: 4.9 µg/m³2026-06-21: 4.8 µg/m³2026-06-22: 16.6 µg/m³2026-06-23: 15.0 µg/m³2026-06-24: 7.8 µg/m³2026-06-25: 12.0 µg/m³2026-06-26: 15.2 µg/m³2026-06-27: 13.9 µg/m³2026-06-28: 17.8 µg/m³2026-06-29: 14.1 µg/m³2026-06-30: 16.8 µg/m³2026-07-01: 24.1 µg/m³2026-07-02: 27.0 µg/m³2026-07-03: 21.8 µg/m³2026-07-04: 33.1 µg/m³2026-07-05: 31.9 µg/m³2026-07-06: 27.7 µg/m³2026-07-07: 16.2 µg/m³2026-07-08: 18.5 µg/m³2026-07-09: 16.4 µg/m³2026-07-10: 19.8 µg/m³2026-07-11: 15.5 µg/m³2026-07-12: 8.8 µg/m³2026-07-13: 15.4 µg/m³2026-07-14: 17.8 µg/m³2026-07-15: 22.4 µg/m³2026-07-16: 12.4 µg/m³2026-07-17: 13.9 µg/m³2026-07-18: 17.2 µg/m³2026-07-19: 19.1 µg/m³2026-07-20: 21.8 µg/m³2026-07-21: 17.3 µg/m³2026-07-22: 14.3 µg/m³2026-07-23: 16.5 µg/m³2026-07-24: 16.0 µg/m³2026-07-25: 12.7 µg/m³2026-07-26: 14.9 µg/m³2026-07-27: 19.6 µg/m³2026-07-28: 20.9 µg/m³2026-07-29: 9.5 µg/m³2026-07-30: 21.3 µg/m³2026-07-31: 17.7 µg/m³2026-08-01: 18.7 µg/m³2026-08-02: 17.2 µg/m³2026-08-03: 17.2 µg/m³2026-08-04: 21.2 µg/m³2026-08-05: 25.9 µg/m³2026-08-06: 15.2 µg/m³2026-08-07: 13.5 µg/m³2026-08-08: 18.5 µg/m³2026-08-09: 18.0 µg/m³2026-08-10: 13.3 µg/m³2026-08-11: 18.6 µg/m³2026-08-12: 16.4 µg/m³2026-08-13: 16.4 µg/m³2026-08-14: 22.6 µg/m³2026-08-15: 20.1 µg/m³2026-08-16: 7.5 µg/m³2026-08-17: 12.5 µg/m³2026-08-18: 14.6 µg/m³2026-08-19: 13.6 µg/m³2026-08-20: 17.3 µg/m³2026-08-21: 22.0 µg/m³2026-08-22: 17.7 µg/m³2026-08-23: 17.4 µg/m³2026-08-24: 12.6 µg/m³2026-08-25: 19.5 µg/m³2026-08-26: 19.8 µg/m³2026-08-27: 17.0 µg/m³2026-08-28: 19.4 µg/m³2026-08-29: 16.3 µg/m³2026-08-30: 18.4 µg/m³2026-08-31: 16.0 µg/m³2026-09-01: 13.9 µg/m³2026-09-02: 19.4 µg/m³2026-09-03: 20.0 µg/m³2026-09-04: 19.2 µg/m³2026-09-05: 15.3 µg/m³2026-09-06: 17.7 µg/m³2026-09-07: 18.9 µg/m³2026-09-08: 19.5 µg/m³2026-09-09: 14.8 µg/m³2026-09-10: 18.5 µg/m³2026-09-11: 21.8 µg/m³2026-09-12: 22.2 µg/m³2026-09-13: 21.0 µg/m³2026-09-14: 15.3 µg/m³2026-09-15: 21.3 µg/m³2026-09-16: 18.8 µg/m³2026-09-17: 6.7 µg/m³2026-09-18: 7.3 µg/m³2026-09-19: 10.3 µg/m³2026-09-20: 16.0 µg/m³2026-09-21: 14.3 µg/m³2026-09-22: 14.5 µg/m³2026-09-23: 13.1 µg/m³2026-09-24: 14.6 µg/m³2026-09-25: 10.0 µg/m³2026-09-26: 8.4 µg/m³2026-09-27: 8.9 µg/m³2026-09-28: 11.5 µg/m³2026-09-29: 5.0 µg/m³2026-09-30: 8.0 µg/m³
Good 0–9.0Moderate 9.1+Unhealthy for sensitive groups 35.5+Unhealthy 55.5+Very unhealthy 125.5+Hazardous 225.5+No data

274 of 359 measured days were over the WHO 24-hour guideline.

Daily world rank

#1#1700OctNovDecJanFebMarAprMayJunJulAugSep

Rank on each day's board (1 = most polluted city that day).

2026 against 2025, month by month

15Jan 2025: 21.9 µg/m³Jan 2026: 26.2 µg/m³JanFeb 2025: 22.1 µg/m³Feb 2026: 26.6 µg/m³FebMar 2025: 23.7 µg/m³Mar 2026: 21.1 µg/m³MarApr 2025: 24.3 µg/m³Apr 2026: 18.5 µg/m³AprMay 2025: 22.3 µg/m³May 2026: 23.2 µg/m³MayJun 2025: 13.5 µg/m³Jun 2026: 15.1 µg/m³JunJul 2025: 15.7 µg/m³Jul 2026: 18.8 µg/m³JulAug 2025: 13.6 µg/m³Aug 2026: 17.2 µg/m³AugSep 2025: 11.9 µg/m³Sep 2026: 14.9 µg/m³SepOct 2025: 15.3 µg/m³OctNov 2025: 23.1 µg/m³NovDec 2025: 23.1 µg/m³Dec

Faded bars: 2025. A month shows once it has 10 measured days.

This week against past years

This weekThis week: 9.5 µg/m³9.520252025: 13.1 µg/m³13.12024no data2023no data

Mean PM2.5 for 24 Sept to 30 Sept in each year. Dashed line: WHO 24-hour guideline.

Monitors

StationOperatorType
Hospital General de MéxicoMexico SINAICA Terms and ConditionsSinaica MexicoReference
FES AragónMexico SINAICA Terms and ConditionsSinaica MexicoReference
UAM XochimilcoMexico SINAICA Terms and ConditionsSinaica MexicoReference
Centro de Ciencias de la AtmósferaMexico SINAICA Terms and ConditionsSinaica MexicoReference
Gustavo A. MaderoMexico SINAICA Terms and ConditionsSinaica MexicoReference
PedregalMexico SINAICA Terms and ConditionsSinaica MexicoReference
CamaronesMexico SINAICA Terms and ConditionsSinaica MexicoReference
Miguel HidalgoMexico SINAICA Terms and ConditionsSinaica MexicoReference
MercedMexico SINAICA Terms and ConditionsSinaica MexicoReference
UAM IztapalapaMexico SINAICA Terms and ConditionsSinaica MexicoReference
Benito JuárezMexico SINAICA Terms and ConditionsSinaica MexicoReference
Ajusco MedioMexico SINAICA Terms and ConditionsSinaica MexicoReference
Mexico CityCC BY 4.0Public ParapsychologyLow-cost

The city's value is the median of its reference monitors each hour; low-cost sensors are listed but not counted when reference monitors exist. Data via OpenAQ; licences as listed. How we rank. Embed this on your site.

Other cities in Mexico

San Luis Potosí 31.7Tuxtla 29.1Hacienda Santa Fe 24.0San Salvador Tizatlalli 19.3Ciudad Nezahualcoyotl 18.0Naucalpan de Juárez 17.9Santa Anita 17.8Aguascalientes 17.8Guadalajara 17.5Saltillo 17.3Puebla 15.5Parque Industrial Ciudad Mitras 14.7

30-day averages, µg/m³. All of Mexico →

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