Home/Cruising/How long until your Waste is decomposed in the Water? INFOGRAPHICCruisingPhoto of the weekUSAHow long until your Waste is decomposed in the Water? INFOGRAPHIC Facebook Twitter Google+ LinkedIn StumbleUpon Pinterest Reddit WhatsApp Share via Email PrintIf one bottle of water made it into the sea, how long would it take to fully decompose? An example? Plastic bags we use in our everyday life take 10-1000 years to decompose, while plastic bottles can take 450 years or more.