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| *Travel Tips>>>Kolkatta Travel Tips |
Wat are the current pollution ratings of kolkata? |
Travel Info Wat are the current pollution ratings of kolkata? Travel Tips Air pollution is acute in Calcutta. Pollutants cannot disperse easily, mainly due to inversion, low wind speed and high congestion. Although Calcutta is known to be one of the world's most polluted cities; available data on pollutant pollution are scanty. So far, data on suspended particulate matter (SPM), SO2, NOx in Calcutta for a couple of years are available. Relatively small amounts of data are available on other parameters like CO, benzene soluble organic matter (BSOM), heavy metals, polynuclear aromatic hydrocarbon (PAH). Almost no data are available on benzene-toluene-xylene (BTX), organolead, heavy metals in inhalable particulate matter (IPM) and acidity of moisture. Samples were collected from five important street crossings in the core city. The average SPM (Suspended Particulate Mater) concentrations during the winter in 2005 was 1181 碌g/m3. High SPM in the city air also showed high BSOM (Benzene Soluble Organic Mater). High BSOM was associated with high value of PAH (Polynuclear Aromatic Hydrocarbons). Twelve PAH compounds were identified and quantified in the city air and some of them are suspected carcinogen. Among the ten heavy metals determined, lead concentration in SPM during winter for Calcutta was high in comparison to other cities of the world. The total organolead concentrations in ambient air were measured and indicated high value of organolead in the city air. The average organolead concentration for 2005 was 296 碌g/m3. Concentrations of benzene, toluene and xylene were found to be much higher than in other studies elsewhere in the world. The average benzene concentration during winter in 2005 was 491 碌g/m3. It is noteable that due to certain initiatives taken by the state government, the pollution level of Kolkata has decreased by 16%, though an increase of 47% has been noted in vehicle traffic and 11% more industrialization. |
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