Delhi's AQI more than doubles every October. Early lung damage is often silent, which is why testing matters even when you feel fine.
Quick answer: October starts north India's worst air pollution season. Delhi recorded its most polluted first week of October in three years in 2026. Long exposure to polluted air reduces lung function and raises the risk of COPD, often without obvious symptoms at first. A quick lung function and SpO₂ check can spot problems early, so you can act before they become serious.
Delhi's average AQI for the first seven days of October 2026 was 171, the highest for that week since 2023 (ThePrint / PTI, 7 Oct 2026). The pattern repeats every year: between 2021 and 2025, Delhi's average AQI rose from about 100 in September to 212 in October (NewsBytes).
This is not only a Delhi problem. Many Indian cities and industrial towns cross safe limits in winter, and rural homes face smoke from biomass cooking fuel all year.
Fine particles (PM2.5) travel deep into the lungs. Over time, they inflame the airways and can reduce how much air you can breathe out. Research from South India linked both outdoor PM2.5 and household biomass smoke to lower lung function in young adults (ISGlobal).
The wider numbers are serious:
Early lung damage is often silent. That is why testing matters even when you feel fine.
| Check | What it measures | Who should get it |
|---|---|---|
| SpO₂ (pulse oximetry) | Oxygen level in the blood | Everyone, especially older adults |
| Lung function test | How much and how fast you can breathe out | Smokers, outdoor workers, people with cough or breathlessness |
| Blood pressure and ECG | Heart strain linked to pollution | Adults over 30, people with heart risk |
| BMI and vitals | Overall baseline | Everyone |
The Clinics On Cloud Health ATM includes pulmonary function and SpO₂ among its 65+ parameters, alongside ECG and blood pressure. The full checkup takes about 10 minutes, and a doctor can review results by video.
It is especially useful for:
Running a screening programme for employees or a community? Contact our team.
Related reading: World Diabetes Day 2026: early action starts with a 10-minute test
Health ATM results are for screening and early risk identification. They do not replace a confirmatory diagnosis by a doctor or laboratory.
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Falling temperatures, slower winds, crop-residue burning and festival-season emissions trap pollutants close to the ground.
Yes. Studies in India link long exposure to PM2.5 and household biomass smoke to lower lung function.
In healthy adults it is usually around 95% to 100%. Persistently lower readings need a doctor's review.
Yes. The Clinics On Cloud Health ATM includes pulmonary function and SpO₂ screening.
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