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Air quality · Chiapas, Mexico

Tuxtla Air Quality Index (AQI) today

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

53 Moderate

Live estimate · modelled

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

Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.

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 49.

Over the next 24 hours the model expects the AQI to range from 39 around 13:00 to 57 around 03:00 (4 Nov).

611th most polluted of 849 cities worldwide right now, 14th of 22 in Mexico.

What to do today

  • Long walk or run outside OK, lighter if very sensitive
  • Kids playing outside OK
  • Airing the house Open
  • Mask outdoors Not needed

Based on the US EPA’s health statement: “Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.” General guidance, not medical advice.

Last 24 hours and next 48

Past hours Forecast

08:00 · 37 09:00 · 38 10:00 · 40 11:00 · 41 12:00 · 41 13:00 · 40 14:00 · 40 15:00 · 39 16:00 · 40 17:00 · 41 18:00 · 42 19:00 · 44 20:00 · 46 21:00 · 48 22:00 · 51 23:00 · 52 00:00 · 53 01:00 · 53 02:00 · 54 03:00 · 54 04:00 · 54 05:00 · 53 06:00 · 53 07:00 · 53 08:00 · 53 09:00 · 52 10:00 · 52 11:00 · 50 12:00 · 46 13:00 · 39 14:00 · 39 15:00 · 42 16:00 · 43 17:00 · 43 18:00 · 41 19:00 · 39 20:00 · 43 21:00 · 49 22:00 · 52 23:00 · 53 00:00 · 54 01:00 · 55 02:00 · 56 03:00 · 57 04:00 · 57 05:00 · 57 06:00 · 56 07:00 · 56 08:00 · 52 09:00 · 42 10:00 · 35 11:00 · 31 12:00 · 27 13:00 · 31 14:00 · 33 15:00 · 36 16:00 · 37 17:00 · 37 18:00 · 37 19:00 · 35 20:00 · 33 21:00 · 33 22:00 · 36 23:00 · 37 00:00 · 39 01:00 · 41 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 08:0037
Mon 09:0038
Mon 10:0040
Mon 11:0041
Mon 12:0041
Mon 13:0040
Mon 14:0040
Mon 15:0039
Mon 16:0040
Mon 17:0041
Mon 18:0042
Mon 19:0044
Mon 20:0046
Mon 21:0048
Mon 22:0051
Mon 23:0052
Tue 00:0053
Tue 01:0053
Tue 02:0054
Tue 03:0054
Tue 04:0054
Tue 05:0053
Tue 06:0053
Tue 07:00 · Now53
Tue 08:00 · Forecast53
Tue 09:00 · Forecast52
Tue 10:00 · Forecast52
Tue 11:00 · Forecast50
Tue 12:00 · Forecast46
Tue 13:00 · Forecast39
Tue 14:00 · Forecast39
Tue 15:00 · Forecast42
Tue 16:00 · Forecast43
Tue 17:00 · Forecast43
Tue 18:00 · Forecast41
Tue 19:00 · Forecast39
Tue 20:00 · Forecast43
Tue 21:00 · Forecast49
Tue 22:00 · Forecast52
Tue 23:00 · Forecast53
Wed 00:00 · Forecast54
Wed 01:00 · Forecast55
Wed 02:00 · Forecast56
Wed 03:00 · Forecast57
Wed 04:00 · Forecast57
Wed 05:00 · Forecast57
Wed 06:00 · Forecast56
Wed 07:00 · Forecast56
Wed 08:00 · Forecast52
Wed 09:00 · Forecast42
Wed 10:00 · Forecast35
Wed 11:00 · Forecast31
Wed 12:00 · Forecast27
Wed 13:00 · Forecast31
Wed 14:00 · Forecast33
Wed 15:00 · Forecast36
Wed 16:00 · Forecast37
Wed 17:00 · Forecast37
Wed 18:00 · Forecast37
Wed 19:00 · Forecast35
Wed 20:00 · Forecast33
Wed 21:00 · Forecast33
Wed 22:00 · Forecast36
Wed 23:00 · Forecast37
Thu 00:00 · Forecast39
Thu 01:00 · Forecast41

Pollutants this hour

  • PM2.5 10.0 µg/m³ 24-hour mean 8.9 µg/m³ · within WHO’s 24-hour guideline (15) 53
  • PM10 12 µg/m³ 11
  • O₃ 54 µg/m³ 17
  • NO₂ 4 µg/m³ 2
  • SO₂ 3 µg/m³ 1
  • CO 0.25 mg/m³ 1

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
Guatemala City Guatemala 63
San Salvador El Salvador 56
San Pedro Sula Honduras 70
Mérida Yucatán 54
Puebla Puebla 75
Tegucigalpa Honduras 34
Mexico City Mexico City 132

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 Tuxtla’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 Tuxtla right now?
53 on the US EPA scale (Moderate) 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 Tuxtla today?
For most people, yes. The EPA’s statement for “Moderate”: Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. General guidance, not medical advice.

Will the air in Tuxtla get better or worse tomorrow?
Over the next 24 hours the model expects the AQI to range from 39 around 13:00 to 57 around 03:00 (4 Nov). Forecasts beyond a day are less certain.

How does Tuxtla compare with other cities?
Right now it is the 611th most polluted of 849 cities we track worldwide, and 14th of 22 in Mexico, all on the same US EPA scale.

Why does another app show a different AQI for Tuxtla?
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.