Delhi PM2.5 air quality averaged 91.7 micrograms in 2022. This means Delhi PM2.5 concentrations exceeded the WHO annual limit of 5.0 micrograms by over 18 times. On the most polluted day, Delhi air quality exceeded the recommended limit by a little under 72 times.
Current Air Quality in Delhi
Air Quality Map
Live Delhi, India AQI air quality map updated hourly.
How is the Air Quality in Delhi, India?
93% of Days in Delhi More Polluted Than WHO Target
During 2022, 93% of days exceeded the WHO annual limit. 7% of days fell within the safe limit of 5 micrograms. That means outdoor air in Delhi was considered safe for just 1 in 12 days during 2022.
The most polluted day in 2022 was 4 Nov 2022, where PM2.5 concentrations were as high as 358.0 micrograms. On this day, PM2.5 pollution exceeded the recommended limit by a little under 72 times.
Delhi PM2.5 Concentrations: 2023 – Year to Date
So far in 2023, Delhi’s PM2.5 concentrations have averaged 263.7 micrograms. That’s 188% higher than the previous year.
Is Delhi Air Quality Improving?
Historical air quality (AQI) data for Delhi over the past 4 years (2019, 2020, 2021 and 2022) shows that air quality has ever so slightly worsened. This shows a worrying trend for air quality in Delhi.
Friday is the Most Polluted Day of the Week in Delhi
Fridays are the most polluted day of the week in Delhi. PM2.5 levels on an average Friday reach 103.7 micrograms. That’s 6% higher than the least polluted day – Tuesday. On Tuesday, PM2.5 air pollution averages 97.8 micrograms.
On average, Fridays see PM2.5 pollution that’s a little under 21 times the WHO limit. For Tuesdays – the least polluted day – PM2.5 air pollution is a little under 20 times.
Why Is Delhi Air Quality Bad Today?
Weather plays a big role in how Delhi air quality is each day. Heat and sunlight help create ozone. That’s why ozone pollution is higher during the day and during hotter months. Studies show rain can reduce PM2.5 air pollution a little, but strong winds usually reduce PM2.5 much more.
Research has found that PM2.5 around the world follows a daily pattern. Of course, any particular day can be an exception. However, across continents, PM2.5 pollution tends to be worse from 8pm to 2am, with another bad spike around morning rush hour. PM2.5 is the lowest around 4pm, when air tends to mix higher in the atmosphere.
Delhi Air Pollution: The Negative Health Effects
Many people know that air pollution causes lung cancer and asthma. But fewer people know that air pollution kills far more people through our hearts and blood vessels.
Studies have shown that PM2.5 raises blood pressure, inflammation, and rates of heart attacks and strokes.
WATCH: Why Is PM2.5 So Harmful to Us?
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Protect Your Health in Delhi From Air Pollution
Despite the harms of PM2.5 air pollution, studies of air purifiers have found that removing particulate in the home lowers blood pressure, reduces inflammation, and improves immune response.
Smart Air provides the world’s most cost-effective, data-backed air purifiers to help air-breathers protect themselves and their family. Smart Air is a certified B Corp founded to share the simple science behind air purifiers and masks, thereby lowering the cost of breathing clean air.