AQI at Its Worst: Delhi, Gurugram and Mumbai Struggle to Breathe as Pollution Levels Soar Across Cities

Air pollution is once again becoming a major public health concern across India, with several cities recording poor to very poor air quality. Delhi-NCR is witnessing particularly worrying pollution levels, while cities such as Mumbai and Pune are also reporting deteriorating air quality. A combination of firecracker emissions following Diwali, vehicular pollution, construction dust, industrial emissions, and unfavourable weather conditions is adding to the pollution burden.

On November 9, 2026, Delhi's average Air Quality Index (AQI) was reported at around 370, placing it in the very poor category. Neighbouring cities, including Noida and Gurugram, also recorded high pollution levels. Meanwhile, Mumbai's air quality remained comparatively better but continued to require attention.

With pollution levels fluctuating across cities, checking the live AQI has become increasingly important for people planning their daily activities.

What Does the Air Quality Index (AQI) Mean?

The Air Quality Index (AQI) is a measure used to communicate how polluted the air is and what its potential health effects could be. India's Central Pollution Control Board (CPCB) classifies AQI into six categories:

• 0-50: Good
• 51-100: Satisfactory
• 101-200: Moderate
• 201-300: Poor
• 301-400: Very Poor
• 401-500: Severe

Higher AQI readings indicate greater pollution and increasing health risks. Fine particulate matter, particularly PM2.5, is a major concern because these tiny particles can travel deep into the lungs and enter the bloodstream.

Also Read: Should You Wear a Mask Indoors When AQI Is Extremely Poor?

Delhi AQI

Delhi remains among the worst-affected cities, with its AQI reaching approximately 370 on November 9. Several monitoring stations recorded readings above 400, indicating severe pollution in certain neighbourhoods.

• Firecracker emissions following Diwali celebrations have added to the existing pollution burden. Vehicular emissions, construction dust, industrial activities, and seasonal weather conditions further contribute to the problem.
• Prolonged exposure to such polluted air can aggravate asthma, trigger coughing and breathing difficulties, and increase the risk of respiratory and cardiovascular problems.

Mumbai AQI

Mumbai's AQI was reported at around 171 on November 9, placing it in the moderate category. Although considerably lower than Delhi's levels, this does not mean the city's air is completely safe.

Vehicular emissions, construction activities, road dust and industrial pollution contribute to Mumbai's air quality concerns. People with asthma, existing lung conditions and other respiratory sensitivities may experience discomfort even when AQI levels are moderate.

AQI Gurgaon

Gurugram recorded an AQI of approximately 328, placing it in the very poor category. Rapid urbanisation, construction activities, traffic congestion, road dust, and industrial emissions contribute to the city's pollution levels.

People living in Gurugram may experience throat irritation, coughing, eye discomfort, and breathing difficulties, particularly during prolonged outdoor exposure.

Noida AQI

Noida also reported worrying pollution levels, with its AQI reaching approximately 340 on November 9. This places the city in the very poor category.

Construction dust, vehicular emissions, industrial activities, and pollution travelling across neighbouring NCR areas contribute to the deteriorating air quality. Children, older adults and people with pre-existing respiratory conditions should be particularly cautious.

Also Read: Can Pollution Make Existing Allergies Worse Even Without a Change in Weather?

Pune AQI

Pune recorded an AQI of around 242, placing it in the poor category. Although its pollution levels were lower than those reported in Delhi-NCR, the reading indicates unhealthy air quality.

Traffic emissions, construction dust, road dust, and industrial activities are among the factors that can affect the city's air quality.

Lucknow AQI

Lucknow recorded an AQI of approximately 250, also falling in the poor category. Vehicular pollution, road dust, construction activities, and seasonal weather conditions can contribute to worsening air quality.

People with asthma and other respiratory conditions should limit prolonged outdoor exposure when pollution levels remain high.

How Can You Protect Yourself When AQI Levels Are High?

While individuals cannot control outdoor pollution, a few precautions can help reduce exposure:

• Check the live AQI before stepping outdoors, particularly if you live in a highly polluted area.
• Avoid outdoor exercises when pollution levels are high.
• Wear a well-fitted N95 mask when outdoor exposure is unavoidable.
• Keep windows and doors closed during periods of heavy pollution.
• Use an air purifier indoors, if available.
• Avoid adding to indoor pollution through smoking, incense sticks, and excessive use of products that release fumes.
• Children, older adults, pregnant women and people with heart or lung conditions should take extra precautions.

Final Word

With the worsening air quality, everyone should take necessary steps to limit theire exposure to pollutants.  Wearing a good mask is mandatory, especially for people in risk groups.