When people think of North India's winter air crisis, they usually picture Delhi. This year's first winter bulletin shows the problem is spreading well into Rajasthan, and the city at the top of the list is a surprising one.

Sawai Madhopur, home to the Ranthambore tiger reserve and better known for safaris than smog, has become the most polluted city in Rajasthan, with an Air Quality Index (AQI) of 306. That puts it in the 'very poor' category, and PM2.5 was identified as the main pollutant. These fine particles can reach deep into the lungs, which is why doctors worry most about them. The reading comes just as the tourist season begins, when visitors from India and abroad head to the district.

A state-wide slide, from the desert to the capital

Sawai Madhopur is not an isolated case. Twelve other cities fell into the 'poor' range of 201 to 300. Bikaner led them at 273, followed by Dausa (232), Churu (231), Sikar (227), Nagaur (225), Alwar (224), Jhunjhunu (224), Karauli (215), Sri Ganganagar (213), Jaisalmer (210) and Jaipur (207).

The pollutants differ by region. In Bikaner, PM10 was the main pollutant. These coarser particles are common in dry, dusty areas. In Sawai Madhopur, the finer PM2.5 dominated. The list covers desert districts in the north-west, the Shekhawati belt and the area around Jaipur, which shows the problem is spread across the state.

Many cities stayed in the 'moderate' range of 101 to 200, but several are close to crossing 200. Tonk recorded 196, Jodhpur 192, Hanumangarh 186, Deeg 185, Pali 184 and Bharatpur 179. Jhalawar, Kota, Chittorgarh, Bundi, Bhilwara, Udaipur and Sirohi also reported moderate levels. With temperatures falling and winds slowing, these cities could slip further in the coming weeks.

What these numbers mean for your health

Under standard AQI classifications, 'poor' air can cause breathing discomfort, especially for people who already have respiratory problems. 'Very poor' air, between 301 and 400, can lead to respiratory illness with prolonged exposure. Children, senior citizens and people with asthma, lung or heart disease are most at risk.

Authorities have asked residents to limit long periods outdoors, especially in the worst-affected areas. For families in Sawai Madhopur, Bikaner and Jaipur, that may mean cutting back on morning walks, outdoor play and long commutes on two-wheelers.

The Rajasthan government has also acted on the Delhi-NCR side. It has banned construction and demolition activities in its districts near the national capital because of poor air quality in the NCR region. The move recognises that pollution does not stop at state borders.

Rajasthan has usually treated winter smog as Delhi's problem. This bulletin suggests the state may need its own winter air plan, one that covers dust, local emissions and seasonal weather in cities that have not been part of the national pollution debate until now.

With inputs from IANS

When people think of North India's winter air crisis, they usually picture Delhi. This year's first winter bulletin shows the problem is spreading well into Rajasthan, and the city at the top of the list is a surprising one.

Sawai Madhopur, home to the Ranthambore tiger reserve and better known for safaris than smog, has become the most polluted city in Rajasthan, with an Air Quality Index (AQI) of 306. That puts it in the 'very poor' category, and PM2.5 was identified as the main pollutant. These fine particles can reach deep into the lungs, which is why doctors worry most about them. The reading comes just as the tourist season begins, when visitors from India and abroad head to the district.

A state-wide slide, from the desert to the capital

Sawai Madhopur is not an isolated case. Twelve other cities fell into the 'poor' range of 201 to 300. Bikaner led them at 273, followed by Dausa (232), Churu (231), Sikar (227), Nagaur (225), Alwar (224), Jhunjhunu (224), Karauli (215), Sri Ganganagar (213), Jaisalmer (210) and Jaipur (207).

The pollutants differ by region. In Bikaner, PM10 was the main pollutant. These coarser particles are common in dry, dusty areas. In Sawai Madhopur, the finer PM2.5 dominated. The list covers desert districts in the north-west, the Shekhawati belt and the area around Jaipur, which shows the problem is spread across the state.

Many cities stayed in the 'moderate' range of 101 to 200, but several are close to crossing 200. Tonk recorded 196, Jodhpur 192, Hanumangarh 186, Deeg 185, Pali 184 and Bharatpur 179. Jhalawar, Kota, Chittorgarh, Bundi, Bhilwara, Udaipur and Sirohi also reported moderate levels. With temperatures falling and winds slowing, these cities could slip further in the coming weeks.

What these numbers mean for your health

Under standard AQI classifications, 'poor' air can cause breathing discomfort, especially for people who already have respiratory problems. 'Very poor' air, between 301 and 400, can lead to respiratory illness with prolonged exposure. Children, senior citizens and people with asthma, lung or heart disease are most at risk.

Authorities have asked residents to limit long periods outdoors, especially in the worst-affected areas. For families in Sawai Madhopur, Bikaner and Jaipur, that may mean cutting back on morning walks, outdoor play and long commutes on two-wheelers.

The Rajasthan government has also acted on the Delhi-NCR side. It has banned construction and demolition activities in its districts near the national capital because of poor air quality in the NCR region. The move recognises that pollution does not stop at state borders.

Rajasthan has usually treated winter smog as Delhi's problem. This bulletin suggests the state may need its own winter air plan, one that covers dust, local emissions and seasonal weather in cities that have not been part of the national pollution debate until now.

With inputs from IANS