atula asks:How is noise categorized as pollution?

In order to find out when noise is considered a pollution, you need to contact your local governmental authorities. They will have information on any state or local laws that apply. Noise is measured in decibels, and you can find decibel comparison charts online. Normal conversation is between 60 and 70 dB. The Occupational Safety and Health Administration has created daily permissible noise level exposure limits. If you are exposed to noises at 90 dB for a period of time, you might have hearing loss, and short-term exposure to 140 dB can result in permanent damage.