Air Pollution in León: Real-time Air Quality Index and smog alert.

The latest data Last 7 days León pollution March 2016 - May 2020
Current data from stations: Estaci��n CICEG Estaci��n Facultad de Estaci��n T21
Locations: « Guanajuato León Santa Julia » La Presa Blanca »
Pollution and air quality forecast for León. Today is Sunday, May 19, 2024. The following air pollution values have been recorded for León:
  1. carbon monoxide (CO) - 1 (Good)
  2. ozone (O3) - 0 (Good)
  3. particulate matter (PM2.5) dust - 13 (Moderate)
  4. particulate matter (PM10) suspended dust - 44 (Moderate)
  5. sulfur dioxide (SO2) - 0 (Good)
Real-time Air Quality Index (AQI) for León, Saturday, July 1, 2023: 2.

air quality index: 1
AQI 2 Moderate

What is the air quality in León today? Is the air polluted in León?. Is there smog?

Today (Saturday, July 1, 2023) air quality is moderate in León. Some pollutants in León may slightly affect very few hypersensitive individuals. Air pollutants in León may cause minor breathing discomfort to sensitive people.


How high is the CO level? (carbon monoxide (CO))
1 (Good)

How is the O3 level today in León? (ozone (O3))
0 (Good)

What is the current level of PM2.5 in León? (particulate matter (PM2.5) dust)
Today's PM2.5 level is: 13 (Moderate) For comparison, the highest level of PM2.5 in León in the last 7 days was: 20 (Saturday, July 8, 2023) and the lowest: 10 (Monday, July 3, 2023). The highest PM2.5 values were recorded: 44 (April 2016). The lowest level of particulate matter PM2.5 pollution occurs in month: October (12).

What is the level of PM10 today in León? (particulate matter (PM10) suspended dust)
The current level of particulate matter PM10 in León is: 44 (Moderate) The highest PM10 values usually occur in month: 89 (January 2017). The lowest value of particulate matter PM10 pollution in León is usually recorded in: May (29).

What is the level of SO2 pollution? (sulfur dioxide (SO2))
0 (Good)



Current data Saturday, July 1, 2023, 10:00 PM

CO 1 (Good)

O3 0 (Good)

PM2,5 13 (Moderate)

PM10 44 (Moderate)

SO2 0 (Good)

Data on air pollution from recent days in León

index 2023-07-08 2023-07-05 2023-07-07 2023-07-03 2023-07-01 2023-07-04 2023-07-06 2023-07-02
co 1
Good		 1
Good		 1
Good		 1
Good		 1
Good		 1
Good		 1
Good		 -
Good
o3 0
Good		 0
Good		 0
Good		 0
Good		 0
Good		 0
Good		 0
Good		 0
Good
pm25 20
Moderate		 18
Moderate		 16
Moderate		 10
Good		 12
Good		 14
Moderate		 19
Moderate		 -
Good
pm10 30
Moderate		 37
Moderate		 38
Moderate		 32
Moderate		 37
Moderate		 32
Moderate		 51
Unhealthy for Sensitive Groups		 23
Moderate
so2 0
Good		 0
Good		 0
Good		 0
Good		 0
Good		 0
Good		 0
Good		 0
Good
data source »
Air pollution in León from March 2016 to May 2020
pollution pm25 hikersbay.com
index 2020-05 2020-04 2020-03 2020-02 2020-01 2019-12 2019-11 2019-10 2019-09 2019-08 2019-07 2019-06 2019-05 2019-04 2019-03 2019-02 2019-01 2018-12 2018-11 2018-10 2018-09 2018-08 2018-07 2018-06 2018-05 2018-04 2018-03 2018-02 2018-01 2017-12 2017-11 2017-10 2017-09 2017-08 2017-07 2017-06 2017-05 2017-04 2017-03 2017-02 2017-01 2016-12 2016-11 2016-10 2016-09 2016-08 2016-07 2016-06 2016-05 2016-04 2016-03
o3:ppm 0.04 (Good) 0.04 (Good) 0.03 (Good) 0.02 (Good) 0.02 (Good) 0.02 (Good) 0.02 (Good) 0.02 (Good) 0.03 (Good) 0.03 (Good) 0.03 (Good) 0.04 (Good) 0.04 (Good) 0.04 (Good) 0.03 (Good) 0.02 (Good) 0.02 (Good) 0.02 (Good) 0.02 (Good) 0.02 (Good) 0.02 (Good) 0.03 (Good) 0.03 (Good) 0.03 (Good) 0.04 (Good) 0.03 (Good) 0.03 (Good) 0.02 (Good) 0.02 (Good) 0.02 (Good) 0.03 (Good) 0.02 (Good) 0.02 (Good) 0.03 (Good) 0.03 (Good) 0.04 (Good) 0.04 (Good) 0.04 (Good) 0.04 (Good) 0.03 (Good) 0.03 (Good) 0.02 (Good) 0.02 (Good) 0.03 (Good) 0.03 (Good) 0.03 (Good) 0.04 (Good) 0.04 (Good) 0.04 (Good) 0.04 (Good) 0.03 (Good)
pm10 29 (Moderate) 40 (Moderate) 45 (Moderate) 40 (Moderate) 41 (Moderate) 48 (Moderate) 33 (Moderate) 31 (Moderate) 30 (Moderate) 34 (Moderate) 38 (Moderate) 38 (Moderate) 64 (Unhealthy for Sensitive Groups) 63 (Unhealthy for Sensitive Groups) 63 (Unhealthy for Sensitive Groups) 59 (Unhealthy for Sensitive Groups) 58 (Unhealthy for Sensitive Groups) 66 (Unhealthy for Sensitive Groups) 51 (Unhealthy for Sensitive Groups) 37 (Moderate) 41 (Moderate) 35 (Moderate) 54 (Unhealthy for Sensitive Groups) 38 (Moderate) 57 (Unhealthy for Sensitive Groups) 66 (Unhealthy for Sensitive Groups) 67 (Unhealthy for Sensitive Groups) 57 (Unhealthy for Sensitive Groups) 72 (Unhealthy for Sensitive Groups) 88 (Unhealthy) 69 (Unhealthy for Sensitive Groups) 50 (Moderate) 43 (Moderate) 44 (Moderate) 44 (Moderate) 53 (Unhealthy for Sensitive Groups) 86 (Unhealthy) 71 (Unhealthy for Sensitive Groups) 66 (Unhealthy for Sensitive Groups) 77 (Unhealthy for Sensitive Groups) 89 (Unhealthy) 79 (Unhealthy for Sensitive Groups) 57 (Unhealthy for Sensitive Groups) 52 (Unhealthy for Sensitive Groups) 48 (Moderate) 39 (Moderate) 40 (Moderate) 37 (Moderate) 73 (Unhealthy for Sensitive Groups) 74 (Unhealthy for Sensitive Groups) 63 (Unhealthy for Sensitive Groups)
so2:ppm 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) - (Good) 0.01 (Good) 0.01 (Good) 0.02 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0 (Good) 0 (Good) 0 (Good) 0 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good)
pm25 - (Good) - (Good) 23 (Moderate) 17 (Moderate) 27 (Moderate) 22 (Moderate) 18 (Moderate) 15 (Moderate) 16 (Moderate) 21 (Moderate) 20 (Moderate) 19 (Moderate) 30 (Moderate) 26 (Moderate) 22 (Moderate) 18 (Moderate) 19 (Moderate) 22 (Moderate) 18 (Moderate) 12 (Good) - (Good) 23 (Moderate) 27 (Moderate) 17 (Moderate) 24 (Moderate) 24 (Moderate) 21 (Moderate) 18 (Moderate) 18 (Moderate) 31 (Moderate) - (Good) 23 (Moderate) - (Good) 15 (Moderate) - (Good) 23 (Moderate) 43 (Unhealthy for Sensitive Groups) 30 (Moderate) 21 (Moderate) 26 (Moderate) 38 (Unhealthy for Sensitive Groups) 30 (Moderate) 17 (Moderate) 14 (Moderate) 20 (Moderate) 19 (Moderate) 38 (Unhealthy for Sensitive Groups) 31 (Moderate) 38 (Unhealthy for Sensitive Groups) 44 (Unhealthy for Sensitive Groups) 30 (Moderate)
co:ppm - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) 0.87 (Good) - (Good) 1.2 (Good) 1.2 (Good) 1 (Good) 1.3 (Good) 1.4 (Good) 0.67 (Good) 0.46 (Good) 0.48 (Good) - (Good) 2.2 (Good) 0.77 (Good) 1.1 (Good) 1.4 (Good) 1.2 (Good) 0.96 (Good) 1.1 (Good) 1.2 (Good) 0.81 (Good) 0.65 (Good) 0.72 (Good) 0.68 (Good) 1.4 (Good) 0.91 (Good) 1.1 (Good) 0.96 (Good) 0.82 (Good) 0.96 (Good) 1.1 (Good) 1.1 (Good) 1.1 (Good) 0.96 (Good) 0.61 (Good) 0.76 (Good) 0.79 (Good) 0.61 (Good) 0.66 (Good) 1.1 (Good) 0.92 (Good)
data source »

Estaci��n CICEG

Thursday, July 6, 2023, 11:00 PM

CO 0.8 (Good)

carbon monoxide (CO)

O3 0.04 (Good)

ozone (O3)

PM2,5 13 (Moderate)

particulate matter (PM2.5) dust

PM10 78 (Unhealthy for Sensitive Groups)

particulate matter (PM10) suspended dust

Estaci��n Facultad de

Wednesday, July 5, 2023, 1:00 PM

PM10 24 (Moderate)

particulate matter (PM10) suspended dust

Estaci��n T21

Saturday, July 1, 2023, 10:00 PM

SO2 0.01 (Good)

sulfur dioxide (SO2)

O3 0.04 (Good)

ozone (O3)

PM10 30 (Moderate)

particulate matter (PM10) suspended dust

Estaci��n CICEG

index 2023-07-06 2023-07-04 2023-07-01 2023-07-03 2023-07-07 2023-07-05 2023-07-08
co 1.2 1.4 1 0.97 0.72 1.2 1
o3 0.03 0.03 0.02 0.05 0.03 0.03 0.03
pm25 19 14 12 9.8 16 18 20
pm10 87 53 56 49 54 61 41

Estaci��n Facultad de

index 2023-07-05 2023-07-04 2023-07-03 2023-07-07 2023-07-06
pm10 23 19 25 28 33

Estaci��n T21

index 2023-07-01 2023-07-06 2023-07-02 2023-07-04 2023-07-03 2023-07-07 2023-07-05 2023-07-08
so2 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01
o3 0.02 0.03 0.03 0.03 0.03 0.03 0.03 0.03
pm10 18 34 23 23 21 31 26 19

Estación CICEG

index 2020-05 2020-04 2020-03 2020-02 2020-01 2019-12 2019-11 2019-10 2019-09 2019-08 2019-07 2019-06 2019-05 2019-04 2019-03 2019-02 2019-01 2018-12 2018-11 2018-10 2018-09 2018-08 2018-07 2018-06 2018-05 2018-04 2018-03 2018-02 2018-01 2017-12 2017-11 2017-10 2017-09 2017-08 2017-07 2017-06
co:ppm - - - - - - - - - - - 0.87 - 1.2 1.2 1 1.3 1.4 0.67 0.46 0.48 - 0.5 0.53 - 2.5 2 1.6 1.6 2.1 - - - 0.18 1.8 1.1
pm10 29 42 47 46 47 55 44 39 34 41 51 40 63 62 64 62 67 79 60 37 39 35 47 32 54 62 64 65 74 87 63 48 44 43 43 50
o3:ppm 0.05 0.04 0.03 0.02 0.02 0.02 0.02 0.02 0.03 0.03 0.04 0.03 0.04 0.04 0.03 0.02 0.02 0.02 0.02 0.02 0.02 0.03 0.03 0.03 0.04 0.04 0.03 0.03 0.02 0.01 0.03 0.03 0.03 0.03 0.03 0.04

Estación Facultad de

2017-06   2020-05
pollution pm25 hikersbay.com
index 2020-05 2020-04 2020-03 2020-02 2020-01 2019-12 2019-11 2019-10 2019-09 2019-08 2019-07 2019-06 2019-05 2019-04 2019-03 2019-02 2019-01 2018-12 2018-11 2018-10 2018-09 2018-08 2018-07 2018-06 2018-05 2018-04 2018-03 2018-02 2018-01 2017-12 2017-11 2017-10 2017-09 2017-08 2017-07 2017-06
o3:ppm 0.04 0.04 0.03 0.02 0.02 0.02 0.02 0.02 0.03 0.03 0.04 0.04 0.05 0.05 0.03 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.03 0.02 0.03 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.03 0.04
pm25 - - 23 17 27 22 18 15 16 21 20 19 30 26 22 18 19 22 18 12 - 23 27 17 24 24 21 18 18 31 - 23 - 15 - 23
co:ppm - - - - - - - - - - - - - - - - - - - - - - 1.1 0.87 1.4 1.3 1.2 0.51 1.1 0.86 0.81 0.65 0.72 1.7 1.6 1.4
so2:ppm 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 - - - - - - - 0.01 - 0.01
pm10 24 35 39 34 30 38 25 23 24 26 32 45 71 67 66 59 54 60 49 45 53 - 70 52 70 85 81 62 83 105 84 61 51 52 54 66

Estación T21

index 2020-05 2020-04 2020-03 2020-02 2020-01 2019-12 2019-11 2019-10 2019-09 2019-08 2019-07 2019-06 2019-05 2019-04 2019-03 2019-02 2019-01 2018-12 2018-11 2018-10 2018-09 2018-08 2018-07 2018-06 2018-05 2018-04 2018-03 2018-02 2018-01 2017-12 2017-11 2017-10 2017-09 2017-08 2017-07 2017-06
so2:ppm 0.01 0.01 0.01 0 0.01 0.01 0.01 0.01 0.01 - - 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0 - - 0.01 0.01 0.02 0.01 0.01 0.01 0.01 0.01 0.01
co:ppm - - - - - - - - - - - - - - - - - - - - - - 5.1 0.91 0.81 0.45 0.49 0.79 0.74 0.68 - - - 0.2 0.89 0.24
pm10 35 43 49 39 45 50 30 31 30 35 33 30 58 61 58 55 54 60 46 30 32 35 43 29 47 52 54 44 57 72 59 39 35 37 36 44
o3:ppm 0.04 0.04 0.03 0.02 0.02 0.02 0.02 0.02 0.03 0.02 0.03 0.04 0.04 0.04 0.03 0.02 0.02 0.02 0.02 0.02 0.03 0.03 0.03 0.03 - 0.04 - - 0.02 - - 0.02 0.02 0.02 - -

Estaci�n CICEG

index 2017-05 2017-04 2017-03 2017-02 2017-01 2016-12 2016-11 2016-10 2016-09 2016-08 2016-07 2016-06 2016-05 2016-04 2016-03
o3:ppm 0.04 0.04 0.03 0.03 - 0.03 0.02 0.03 0.03 0.03 0.04 0.04 0.04 0.04 0.03
pm10 82 71 65 76 94 91 62 58 52 40 41 50 95 97 78
co:ppm 1.2 0.93 0.85 1 1.2 1.2 1.2 0.99 0.76 - - 0.48 0.68 1.4 1.4

Estaci�n Facultad de

2016-03   2017-05
pollution pm25 hikersbay.com
index 2017-05 2017-04 2017-03 2017-02 2017-01 2016-12 2016-11 2016-10 2016-09 2016-08 2016-07 2016-06 2016-05 2016-04 2016-03
o3:ppm 0.04 0.04 0.04 0.03 0.03 0.02 0.02 0.02 0.03 0.03 0.04 0.04 0.03 0.04 0.03
so2:ppm 0.01 0.01 0.01 0.01 0.01 0.01 0 0 0 0 0.01 0.01 0.01 0.01 0.01
pm25 43 30 21 26 38 30 17 14 20 19 38 31 38 44 30
pm10 101 80 75 83 93 82 65 56 54 47 37 30 75 72 44
co:ppm 1.5 1.4 1.2 1 1.2 1.2 1.1 0.93 0.88 1.1 1 1 0.91 1.2 0.76

Estaci�n T21

index 2017-05 2017-04 2017-03 2017-02 2017-01 2016-12 2016-11 2016-10 2016-09 2016-08 2016-07 2016-06 2016-05 2016-04 2016-03
co:ppm 0.57 0.6 0.41 0.82 0.88 0.97 0.91 - 0.19 0.4 0.54 0.3 0.39 0.63 0.61
o3:ppm 0.05 0.04 0.04 0.03 0.03 0.02 0.02 0.03 0.03 0.03 0.03 0.04 0.04 0.04 0.03
so2:ppm 0.01 0.01 0.01 0.01 0.01 0.01 - - - - - 0.02 0.02 0.02 0.02
pm10 75 62 58 73 79 65 45 42 37 31 40 30 50 53 68

* Pollution data source: https://openaq.org (AirNow) The data is licensed under CC-By 4.0