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Air quality · Mexico

Mexico City Air Quality Index (AQI) today

Modelled estimate for 07:00 local time (UTC-6), refreshed 3 Nov, 07:52 UTC+0.

132 Unhealthy for sensitive groups

Live estimate · modelled

US EPA AQI07:00 UTC-6, 3 Nov Main pollutant: PM2.5

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

This page uses EPA’s NowCast, which follows the last few hours, as the US government’s AirNow does. On a 24-hour average of particles, as many apps show, it is 89.

Over the next 24 hours the model expects the AQI to range from 52 around 15:00 to 149 around 08:00 (3 Nov).

134th most polluted of 849 cities worldwide right now, 2nd of 22 in Mexico.

What to do today

  • Long walk or run outside Shorter if you have asthma or heart disease
  • Kids playing outside OK, less for kids with asthma
  • Airing the house Open
  • Mask outdoors If you are in a sensitive group

Based on the US EPA’s health statement: “Members of sensitive groups may experience health effects. The general public is less likely to be affected.” General guidance, not medical advice.

Last 24 hours and next 48

Past hours Forecast

08:00 · 82 09:00 · 78 10:00 · 74 11:00 · 70 12:00 · 65 13:00 · 61 14:00 · 59 15:00 · 57 16:00 · 55 17:00 · 64 18:00 · 67 19:00 · 64 20:00 · 71 21:00 · 80 22:00 · 91 23:00 · 106 00:00 · 123 01:00 · 134 02:00 · 139 03:00 · 138 04:00 · 133 05:00 · 126 06:00 · 122 07:00 · 132 08:00 · 149 09:00 · 113 10:00 · 83 11:00 · 68 12:00 · 59 13:00 · 55 14:00 · 53 15:00 · 52 16:00 · 52 17:00 · 52 18:00 · 53 19:00 · 56 20:00 · 59 21:00 · 64 22:00 · 71 23:00 · 79 00:00 · 87 01:00 · 92 02:00 · 93 03:00 · 91 04:00 · 89 05:00 · 88 06:00 · 90 07:00 · 97 08:00 · 108 09:00 · 95 10:00 · 82 11:00 · 72 12:00 · 66 13:00 · 61 14:00 · 57 15:00 · 54 16:00 · 52 17:00 · 50 18:00 · 52 19:00 · 62 20:00 · 70 21:00 · 79 22:00 · 93 23:00 · 115 00:00 · 134 01:00 · 145 Now

US EPA AQI per hour, UTC-6. Particles use EPA’s NowCast (a 12-hour weighted average), ozone and CO an 8-hour average. Lighter bars are the CAMS forecast.

Show as a table
TimeAQI
Mon 08:0082
Mon 09:0078
Mon 10:0074
Mon 11:0070
Mon 12:0065
Mon 13:0061
Mon 14:0059
Mon 15:0057
Mon 16:0055
Mon 17:0064
Mon 18:0067
Mon 19:0064
Mon 20:0071
Mon 21:0080
Mon 22:0091
Mon 23:00106
Tue 00:00123
Tue 01:00134
Tue 02:00139
Tue 03:00138
Tue 04:00133
Tue 05:00126
Tue 06:00122
Tue 07:00 · Now132
Tue 08:00 · Forecast149
Tue 09:00 · Forecast113
Tue 10:00 · Forecast83
Tue 11:00 · Forecast68
Tue 12:00 · Forecast59
Tue 13:00 · Forecast55
Tue 14:00 · Forecast53
Tue 15:00 · Forecast52
Tue 16:00 · Forecast52
Tue 17:00 · Forecast52
Tue 18:00 · Forecast53
Tue 19:00 · Forecast56
Tue 20:00 · Forecast59
Tue 21:00 · Forecast64
Tue 22:00 · Forecast71
Tue 23:00 · Forecast79
Wed 00:00 · Forecast87
Wed 01:00 · Forecast92
Wed 02:00 · Forecast93
Wed 03:00 · Forecast91
Wed 04:00 · Forecast89
Wed 05:00 · Forecast88
Wed 06:00 · Forecast90
Wed 07:00 · Forecast97
Wed 08:00 · Forecast108
Wed 09:00 · Forecast95
Wed 10:00 · Forecast82
Wed 11:00 · Forecast72
Wed 12:00 · Forecast66
Wed 13:00 · Forecast61
Wed 14:00 · Forecast57
Wed 15:00 · Forecast54
Wed 16:00 · Forecast52
Wed 17:00 · Forecast50
Wed 18:00 · Forecast52
Wed 19:00 · Forecast62
Wed 20:00 · Forecast70
Wed 21:00 · Forecast79
Wed 22:00 · Forecast93
Wed 23:00 · Forecast115
Thu 00:00 · Forecast134
Thu 01:00 · Forecast145

Pollutants this hour

  • PM2.5 52.5 µg/m³ 24-hour mean 29.7 µg/m³ · 2.0× WHO’s 24-hour guideline (15) 132
  • PM10 53 µg/m³ 44
  • O₃ 13 µg/m³ 0
  • NO₂ 65 µg/m³ 32
  • SO₂ 42 µg/m³ 23
  • CO 1.18 mg/m³ 13

Modelled concentrations at the city’s location (CAMS). The sub-index uses the same averaging as the headline, so the highest one is the AQI.

Nearby cities

City AQI
Ecatepec de Morelos México 132
Puebla Puebla 75
Querétaro Querétaro 92
Morelia Michoacán 80
Acapulco de Juárez Guerrero 52
León Guanajuato 46
San Luis Potosí San Luis Potosí 56

Where this number comes from

The Copernicus Atmosphere Monitoring Service (CAMS) forecasts air pollution worldwide on a grid (about 11 km over Europe, about 45 km elsewhere). We take the grid value at Mexico City’s coordinates and score it with the US EPA’s method. It is a model, not a measurement: a nearby monitoring station can read quite differently, especially next to busy roads or during fires and dust storms.

Full methodology · Data: CAMS via Open-Meteo (CC BY 4.0); city list: GeoNames (CC BY 4.0).

  • Good 0–50
  • Moderate 51–100
  • Unhealthy for sensitive groups 101–150
  • Unhealthy 151–200
  • Very unhealthy 201–300
  • Hazardous 301–500

Questions

What is the AQI in Mexico City right now?
132 on the US EPA scale (Unhealthy for sensitive groups) at 07:00 UTC-6, 3 Nov. PM2.5 is the pollutant with the highest sub-index. This is a modelled estimate from the Copernicus Atmosphere Monitoring Service (CAMS), not a reading from a monitoring station.

Is it safe to exercise outside in Mexico City today?
For most people, yes; people with asthma, heart or lung disease, older adults and children should take it easier. The EPA’s statement for “Unhealthy for sensitive groups”: Members of sensitive groups may experience health effects. The general public is less likely to be affected. General guidance, not medical advice.

Will the air in Mexico City get better or worse tomorrow?
Over the next 24 hours the model expects the AQI to range from 52 around 15:00 to 149 around 08:00 (3 Nov). Forecasts beyond a day are less certain.

How does Mexico City compare with other cities?
Right now it is the 134th most polluted of 849 cities we track worldwide, and 2nd of 22 in Mexico, all on the same US EPA scale.

Why does another app show a different AQI for Mexico City?
Apps differ in source (government stations, low-cost sensors or a model like this one), in scale (US EPA, European, or a national index) and in averaging (hourly or NowCast, 8-hour, 24-hour). This page uses the US EPA AQI with EPA’s NowCast for particles, computed from the CAMS forecast for the city’s location.