Systems and methods are disclosed for providing carbonated water through a typical kitchen faucet. The faucet-integrated carbonation system can include a carbonated water reservoir coupled to a residential or commercial cold water supply line as well as a CO2 tank, all of which can be mounted under a kitchen countertop or the like. The water held in the reservoir can be carbonated using the CO2 when a user activates a CO2 activation mechanism. The system can further include a carbonated water on/off valve for dispensing carbonated water from the carbonated water reservoir via a waterway with an outlet disposed at the end of the faucet.