National Ambient Air Quality Standard 2012 AD standard statesthe construction emissions fugitive and combustion shall not pollute the ambient air quality to exceed the following limits. National ambient air quality standards for several pollutants differs according to sectors.National Standard on Noise Level 2069 BS standard states the threshold limit of noise for Leq in decibel as prescribed by it. It has different noise level for various sectors in day and night as prescribed in the standard.
along a polluted road in Kathmandu
