OSMOSIS

Delhi's Air Quality Crisis

The air in Delhi remains a major health issue. Although things have improved a bit since the

late-November "Severe" period, the Air Quality Index (AQI) is still in the "Unhealthy" to

"Poor" range.

* Hotspots: Areas like Anand Vihar and Mundka consistently show the worst real-time

numbers.

* Key Factor: Slow winds and cold weather are keeping pollutants close to the ground,

creating thick smog. The forecast for early December suggests low air movement (2400-

5000 m^2/s), indicating no quick improvement.

Historical Air Quality Trend

Delhi's air quality usually gets worse in winter, but the long-term trend shows a slight,

steady improvement. The average AQI for 2025 (so far) is 139, the best since 2018,

excluding lockdown years.

* Worst Spike: On November 12, 2025, the AQI reached 559, one of the highest in five

years.

* Annual AQI Averages (Selected Years):

* 2020: 153 (Lockdown effect)

* 2021: 162

* 2023: 164

* 2024: 169

* PM2.5: Levels dropped to an average of 74 µg/m³ from January to August 2025, down from

95 µg/m³ in 2018. However, there was no day in 2025 that met the safe World Health

Organization (WHO) levels.

Sources of Air Pollution

The ongoing smog results from several overlapping factors:* Vehicular Emissions: Cars and trucks contribute 20-50% of harmful particles in winter,

mainly due to old vehicles and dirty fuel in the National Capital Region (NCR).

* Stubble Burning: Farmers in Punjab and Haryana burn crop residue in the fall, adding

significant smoke to the air.

* Construction and Industry: Construction generates about 8,000 tons of dust each day.

Factory smoke and trash fires also worsen the air.

* Geography and Weather: Cold weather traps pollutants, and Delhi's hilly landscape acts

like a "bowl," holding the smog in place.

Health Impacts

Poor air quality has serious health effects:

* Immediate Effects: Increases in coughing and asthma attacks, particularly among

children and the elderly.

* Severe Risks: Tiny PM2.5 particles can enter the bloodstream, raising the risk of heart

issues, strokes, and cancer over time.

* General Health: Even healthy adults can feel tired, develop bronchitis, and face long-

term lung problems from prolonged exposure.

* Statistics: Last season, reports of breathing problems rose by 15%.

Government Interventions

Authorities are rolling out a multi-stage action plan and monitoring system:

* GRAP (Graded Response Action Plan): A step-by-step approach activated based on AQI

levels.

* Stage I (AQI 201-300): Measures include dust suppression (water spraying), vehicle

restrictions, and a ban on coal use.

* Stage II: Bans on diesel generator sets and certain brick-making activities.

* Monitoring: Over 500 stations track air quality.

* New Directives: The Supreme Court has called for an updated action plan, and the Prime

Minister’s Office (PMO) has asked for more extensive research on the issue.* Progress: Efforts such as promoting electric vehicles and better farming tools for stubble

management have led to small improvements in 2025.

Outlook and Safety Measures

Air quality is expected to stay in the Poor to Very Poor categories throughout December.

While temporary winds may provide brief relief, the cold weather will generally prevail.

| Outdoor Protection :Wear N95 masks outside. Avoid running or playing hard outdoors.

| Indoor Protection : Use air cleaners and purifiers. Keep windows and doors shut.

| Health & Hydration : Drink plenty of water and eat antioxidant-rich fruits, like oranges.

| Monitoring : Regularly check real-time air quality through apps like AQI.in.

Long-term solutions require ongoing efforts in pollution control, but individual safety

measures are crucial in the meantime.