"Water" is a song written by the British female singer-songwriter Lynsey de Paul and Barry Blue, who was credited as Barry Green. It was first released as a track on De Paul's debut album Surprise in March 1973. Shortly afterwards, a live version that de Paul recorded for the BBC, appearing on the BBC Transcription Services album number 443 in April 1973. It was released as a single later that year in Peru with the title "Agua", where it reach No.16 on the singles chart, but the song was not released as a single in Europe, Japan and the United States. It has since appeared on a number of de Paul compilation albums such as Greatest Hits, The Best of Lynsey de Paul and the Sugar and Beyond anthology.