KATHMANDU: The Department of Environment has issued a safety circular as air pollution in Kathmandu reached hazardous levels on Tuesday.

According to the data obtained from the US Embassy air quality monitor (AQM) placed at Phora Durbar, the PM2.5 measurement at 12:00 pm today was 448.

Read More: Air pollution in Kathmandu valley reaches hazardous level

"Air pollution level in the valley has risen tremendously with the weather changes on January 4, especially in the mornings and evenings. This phenomenon may have negative effect on our health," the department said in a statement issued today.

The DoE especially cautioned children, elderly, and those suffering from respiratory and  cardiovascular ailments to avoid going out if possible or adopt special precautions in case they have to step out.

Apart from Kathmandu, cities in Terai such as Biratnagar and Nepalgunj too have been found to have high levels of pollution. The department in its statement has said people in said cities need to adopt precaution while urging them to not light fires or burn waste as these activities could further add to air pollution.

DoE warned that the air pollution levels could get worse if the weather does not clear as air quality also depends on the state of weather.