Water derived from any source of potable water that has been subjected to treatments such as decantation, filtration, aeration, filtration with membrane filter, depth filter, cartridge filter, activated carbon filtration, demineralization, re-mineralization reverse osmosis, and packed is referred to as packaged drinking water (PDW). It could be disinfected to the point where it doesn't contaminate the drinking water. It can be disinfected with chemical or physical treatments to reduce the amount of microorganisms to a level that does not jeopardize food safety or appropriateness. Packaged drinking water, the study's subject, is also known as 'Bottled Drinking Water,' because bottles are used to fill the water for drinking. As previously said, the bottled drinking water industry in Chennai is a growing industry. At this stage, a thorough examination of the manufacture, marketing, and consumption of packaged drinking water would aid in identifying the bottlenecks and issues that have arisen. As a result, the Chennai District was specifically chosen for this investigation. The researcher pursued two key goals: to study the expansion of packaged drinking water in Chennai and to analyse the packaged drinking water consumer behaviour pattern in Chennai. The null hypothesis states that there is no significant link between respondents' purchasing behaviour and their demographic characteristics

Consumer behavior, packaged drinking water, purchasing behavior.