Water Manipulation – The ability to control water including but not limited to making constructs from water.
Mera (DC) is a deadly combatant with water.
Tsunami (DC) can create tidal waves (DC Who’s Who V1 #24).
Aspen Mathews – Aspen Universe – Sourcebook #1 (2016)
Riptide (Image) in Youngblood Battlezone #2.
Sea Witch (Marvel) is one of the Young Gods in Spectacular Spider-Man Annual V1 #8.
Water Wizard aka Aqueduct (Marvel) in Official Handbook of the Marvel Universe V2 #14.
Water Hazard (Ben 10)
Trading Card Games including many cards dealing with water manipulation.
Aqua 16 Sudden Waterspout
Aqua 29 Sprinkle Water of Tranquility
Aqua 31 Administer Water of Immortality
Aqua 32 Chosen of Water
Conjured Sparkling Water
Water Cannon Brigade
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