I went to get Air for my car last night and the station tried to charge me $.75. The sign on the Air machine said "go inside for free air" so i went inside and there was Indian guy ... well . . . lets just say we had some words. In Texas do you have to pay for Air/Water at gas stations? In cali its always free you just have to go in and ask for it. that is the Law Cali law states Service stations. (1) Existing law requires every service station in this state to provide, during operating hours, water, compressed air, and a gauge for measuring air pressure, to the public for use in servicing any passenger or commercial vehicle, as defined.