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

The latest data Last 7 days Chennai district pollution October 2018 - May 2020 Quality of life
Current data from stations: US Diplomatic Post: Chennai Velachery Res. Area, Chennai - CPCB US Diplomatic Post: Chennai
Locations: « Tamil Nadu Chennai district Vepery » Pallipatu »
Pollution and air quality forecast for Chennai district. Today is Friday, May 3, 2024. The following air pollution values have been recorded for Chennai district:
  1. particulate matter (PM2.5) dust - -305 (Good)
  2. nitrogen dioxide (NO2) - 48 (Moderate)
  3. carbon monoxide (CO) - 940 (Good)
  4. ozone (O3) - 4 (Good)
  5. sulfur dioxide (SO2) - 20 (Good)
  6. particulate matter (PM10) suspended dust - 70 (Unhealthy for Sensitive Groups)
Real-time Air Quality Index (AQI) for Chennai district, Tuesday, February 6, 2024: 3.

air quality index: 2
AQI 3 Unhealthy for Sensitive Groups

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

Today (Tuesday, February 6, 2024) air quality is moderately polluted in Chennai district. Healthy people may experience slight irritations and sensitive persons will be slightly affected to a larger extent by the pollutions in Chennai district.


What is the current level of PM2.5 in Chennai district? (particulate matter (PM2.5) dust)
Today's PM2.5 level is: -305 (Good) For comparison, the highest level of PM2.5 in Chennai district in the last 7 days was: 63 (Tuesday, February 6, 2024) and the lowest: -999 (Tuesday, September 26, 2023). The highest PM2.5 values were recorded: 597 (December 2018). The lowest level of particulate matter PM2.5 pollution occurs in month: May (9.1).

How high is the level of NO2? (nitrogen dioxide (NO2))
48 (Moderate)

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

How is the O3 level today in Chennai district? (ozone (O3))
4 (Good)

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

What is the level of PM10 today in Chennai district? (particulate matter (PM10) suspended dust)
The current level of particulate matter PM10 in Chennai district is: 70 (Unhealthy for Sensitive Groups)



Current data Tuesday, February 6, 2024, 7:00 AM

PM2,5 -305 (Good)

NO2 48 (Moderate)

CO 940 (Good)

O3 4 (Good)

SO2 20 (Good)

PM10 70 (Unhealthy for Sensitive Groups)

Data on air pollution from recent days in Chennai district

index 2023-09-26 2023-09-27 2023-09-28 2023-09-29 2023-09-30 2023-10-01 2023-10-02 2023-10-03 2022-10-31 2024-01-31 2024-02-01 2024-02-02 2024-02-03 2024-02-04 2024-02-05 2024-02-06
pm25 -999
Good		 -999
Good		 -999
Good		 -999
Good		 -999
Good		 -999
Good		 -999
Good		 -999
Good		 31
Moderate		 30
Moderate		 15
Moderate		 15
Moderate		 20
Moderate		 19
Moderate		 36
Unhealthy for Sensitive Groups		 63
Unhealthy
no2 -
Good		 -
Good		 -
Good		 -
Good		 -
Good		 -
Good		 -
Good		 -
Good		 36
Good		 -
Good		 -
Good		 -
Good		 -
Good		 -
Good		 -
Good		 -
Good
co -
Good		 -
Good		 -
Good		 -
Good		 -
Good		 -
Good		 -
Good		 -
Good		 875
Good		 -
Good		 -
Good		 -
Good		 -
Good		 -
Good		 -
Good		 -
Good
o3 -
Good		 -
Good		 -
Good		 -
Good		 -
Good		 -
Good		 -
Good		 -
Good		 4
Good		 -
Good		 -
Good		 -
Good		 -
Good		 -
Good		 -
Good		 -
Good
so2 -
Good		 -
Good		 -
Good		 -
Good		 -
Good		 -
Good		 -
Good		 -
Good		 20
Good		 -
Good		 -
Good		 -
Good		 -
Good		 -
Good		 -
Good		 -
Good
pm10 -
Good		 -
Good		 -
Good		 -
Good		 -
Good		 -
Good		 -
Good		 -
Good		 71
Unhealthy for Sensitive Groups		 -
Good		 -
Good		 -
Good		 -
Good		 -
Good		 -
Good		 -
Good
data source »
Air pollution in Chennai district from October 2018 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 2018-09 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 2016-02 2016-01 2015-12 2018-11 2018-10
pm25 9.1 (Good) 9.6 (Good) 24 (Moderate) 32 (Moderate) 32 (Moderate) 30 (Moderate) 39 (Unhealthy for Sensitive Groups) 20 (Moderate) 19 (Moderate) 17 (Moderate) 36 (Unhealthy for Sensitive Groups) 30 (Moderate) 25 (Moderate) 15 (Moderate) 22 (Moderate) 34 (Moderate) 205 (Very bad Hazardous) 597 (Very bad Hazardous) 35 (Moderate) 60 (Unhealthy) 45 (Unhealthy for Sensitive Groups) 105 (Very Unhealthy) 66 (Unhealthy) 40 (Unhealthy for Sensitive Groups) 201 (Very bad Hazardous) 329 (Very bad Hazardous) 84 (Very Unhealthy) 54 (Unhealthy for Sensitive Groups) 52 (Unhealthy for Sensitive Groups) 65 (Unhealthy) 18 (Moderate) 23 (Moderate) 27 (Moderate) 24 (Moderate) 40 (Unhealthy for Sensitive Groups) 31 (Moderate) 29 (Moderate) 32 (Moderate) 47 (Unhealthy for Sensitive Groups) 54 (Unhealthy for Sensitive Groups) 50 (Unhealthy for Sensitive Groups) 50 (Unhealthy for Sensitive Groups) 30 (Moderate) 37 (Unhealthy for Sensitive Groups) 33 (Moderate) 37 (Unhealthy for Sensitive Groups) 18 (Moderate) 20 (Moderate) 26 (Moderate) 36 (Unhealthy for Sensitive Groups) 49 (Unhealthy for Sensitive Groups) 63 (Unhealthy) 41 (Unhealthy for Sensitive Groups) 34 (Moderate)
no2 1.7 (Good) 1.6 (Good) 3.8 (Good) 5.7 (Good) 4.9 (Good) 8.8 (Good) 16 (Good) 18 (Good) 17 (Good) 17 (Good) 23 (Good) 27 (Good) 8.3 (Good) 7.6 (Good) - (Good) 11 (Good) - (Good) - (Good) 15 (Good) 15 (Good) - (Good) - (Good) 46 (Moderate) 33 (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) 9.8 (Good) 13 (Good)
so2 4 (Good) 7.4 (Good) 6.4 (Good) 6 (Good) 5.3 (Good) 4.9 (Good) 4.5 (Good) 4.7 (Good) 3.6 (Good) 3.8 (Good) 3.7 (Good) 4.1 (Good) 4.7 (Good) 4.6 (Good) - (Good) 4.5 (Good) - (Good) - (Good) 4.2 (Good) 4.3 (Good) - (Good) - (Good) 9.1 (Good) 4.1 (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) 4.2 (Good) 6.2 (Good)
co 744 (Good) 747 (Good) 665 (Good) 875 (Good) 845 (Good) 454 (Good) 525 (Good) 793 (Good) 724 (Good) 724 (Good) 767 (Good) 1 (Good) 826 (Good) 843 (Good) - (Good) 1 (Good) - (Good) - (Good) 659 (Good) 648 (Good) - (Good) - (Good) 925 (Good) 779 (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) 966 (Good) 779 (Good)
o3 12 (Good) 11 (Good) 5.6 (Good) 20 (Good) 12 (Good) 23 (Good) 17 (Good) 15 (Good) 15 (Good) 20 (Good) 34 (Good) 41 (Good) 18 (Good) 16 (Good) - (Good) 75 (Moderate) - (Good) - (Good) 31 (Good) 9.2 (Good) - (Good) - (Good) 34 (Good) 26 (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) 21 (Good) 32 (Good)
data source »

Quality of life in Chennai district

Green and Parks in the City

Chennai district 42%

Nepal: 32% Bangladesh: 33% Bhutan: 82% Sri Lanka: 59% Pakistan: 49%

particulate matter PM2.5

Chennai district 49 (Unhealthy for Sensitive Groups)

Pleasure of spending time in the city

Chennai district 41%

Nepal: 32% Bangladesh: 26% Bhutan: 61% Sri Lanka: 52% Pakistan: 43%

particulate matter PM10

Chennai district 80 (Unhealthy)

Air Pollution

Chennai district 63%

Nepal: 76% Bangladesh: 78% Bhutan: 45% Sri Lanka: 53% Pakistan: 64%

Garbage Disposal

Chennai district 30%

Nepal: 25% Bangladesh: 22% Bhutan: 47% Sri Lanka: 41% Pakistan: 34%

Availability and quality of drinking water

Chennai district 40%

Nepal: 36% Bangladesh: 44% Bhutan: 64% Sri Lanka: 65% Pakistan: 44%

Cleanliness and tidiness

Chennai district 32%

Nepal: 27% Bangladesh: 23% Bhutan: 57% Sri Lanka: 52% Pakistan: 40%

Noise and Light pollution

Chennai district 57%

Nepal: 55% Bangladesh: 63% Bhutan: 55% Sri Lanka: 50% Pakistan: 59%

Water Pollution

Chennai district 74%

Nepal: 76% Bangladesh: 74% Bhutan: 56% Sri Lanka: 57% Pakistan: 70%
Source: Numbeo


US Diplomatic Post: Chennai

Tuesday, October 3, 2023, 8:00 AM

PM2,5 -999 (Good)

particulate matter (PM2.5) dust

Velachery Res. Area, Chennai - CPCB

Monday, October 31, 2022, 1:45 AM

NO2 48 (Moderate)

nitrogen dioxide (NO2)

CO 940 (Good)

carbon monoxide (CO)

PM2,5 32 (Moderate)

particulate matter (PM2.5) dust

O3 3.6 (Good)

ozone (O3)

SO2 20 (Good)

sulfur dioxide (SO2)

PM10 70 (Unhealthy for Sensitive Groups)

particulate matter (PM10) suspended dust

US Diplomatic Post: Chennai

Tuesday, February 6, 2024, 7:00 AM

PM2,5 52 (Unhealthy for Sensitive Groups)

particulate matter (PM2.5) dust

US Diplomatic Post: Chennai

index 2023-10-03 2023-10-02 2023-10-01 2023-09-30 2023-09-29 2023-09-28 2023-09-27 2023-09-26
pm25 -999 -999 -999 -999 -999 -999 -999 -999

Velachery Res. Area, Chennai - CPCB

index 2022-10-31
no2 36
co 875
pm25 31
o3 4.5
so2 20
pm10 71

US Diplomatic Post: Chennai

index 2024-02-06 2024-02-05 2024-02-04 2024-02-03 2024-02-02 2024-02-01 2024-01-31
pm25 63 36 19 20 15 15 30

US Diplomatic Post: Chennai

2015-12   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 2018-09 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 2016-02 2016-01 2015-12
pm25 9.5 8.9 22 31 35 35 48 14 21 19 22 19 24 15 22 35 205 597 43 94 45 105 95 46 201 329 84 54 52 65 18 23 27 24 40 31 29 32 47 54 50 50 30 37 33 37 18 20 26 36 49 63

Velachery Res. Area, Chennai - CPCB

2018-04   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 2019-02 2018-11 2018-10 2018-09 2018-08 2018-05 2018-04
pm25 8.7 10 27 32 30 25 30 26 16 14 49 41 26 16 34 41 34 26 26 37 34
no2 1.7 1.6 3.8 5.7 4.9 8.8 16 18 17 17 23 27 8.3 7.6 11 9.8 13 15 15 46 33
so2 4 7.4 6.4 6 5.3 4.9 4.5 4.7 3.6 3.8 3.7 4.1 4.7 4.6 4.5 4.2 6.2 4.2 4.3 9.1 4.1
co 744 747 665 875 845 454 525 793 724 724 767 1 826 843 1 966 779 659 648 925 779
o3 12 11 5.6 20 12 23 17 15 15 20 34 41 18 16 75 21 32 31 9.2 34 26

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