An AQI from 0 to 100 is considered as good, 100 to 200 moderate, 200 to 300 'poor', 301 to 400 'very poor', and 401 to 500 'severe'.
The AQI in several districts of Bihar started worsening in the first week of November this year. Surprisingly, there are no industries in these districts that could be blamed for it. Even the officials of the pollution departments are clueless about how to deal with it.
Ravi Sinha, a USA-based environmentalist and a native of Motihari told IANS: "My district Motihari has been featuring in the worst category for the past month despite no industrial activities. Sugar mills were closed decades ago. I read the geogenic and geographical factors and found that the regular flood leaving behind silt and alluvial soil led to higher levels of Particulate Meter (PM) 2.5 and 10 in the lower atmosphere."
"In the past, we have seen clear blue sky and the peaks of the Himalayas from my village located on the Indo-Nepal border. Now, it has turned into a gas chamber with people having health issues and low visibility," Sinha said.
The cities like Arrah, Motihari, and Bettiah do not have traffic volumes like metro cities, still, the air pollution in these areas has reached alarming levels.
The experts believe that the unsystematic development of cities, road construction, building constructions, and transportation of sand and clay are the main reasons for air quality deterioration in urban cities of the state.
"We have been seeing rampant constructions of roads and buildings in these cities. They are breaching basic norms of neither sprinkling water on roads nor covering the construction areas leading to fine particles amalgamating with drops of dew and forming smog," Rajesh Tiwari, another environmentalist and a resident of Patliputra colony Patna, said.
"The roads of Bihar are not as higher as other metro cities. As a result, the movement of traffic is slow here. We all know that the slow movement of vehicles generates more toxic gases. We are observing a mixture of gasses, dust, and dew in the atmosphere and it is remaining at a height of not more than 150 feet. It is also a wedding season when crackers burst, also responsible for worsening air quality. If law enforcement agencies would not take preventive measures, the AQI of these cities will soon jump over 450 marks," Tiwari said.
The PM 2.5 level at Patna's Rajbansi Nagar was recorded at 242 per cubic meter, while PM 10 was 150, at noon Friday.
According to an official of the Bihar State Pollution Control Board (BSPCB), the PM 2.5 level is in a very unhealthy zone and PM 10 is also in an unhealthy zone. Due to the high level of PM 2.5 and PM 10 in the air, complaint of eye-burning is common among people of Patna. The situation is extremely dangerous for asthmatic patients.
