swimming pool is okay
i've seen this on sony xperia care for the Z2 :
Using your device in wet and dusty conditions
You can use your device:
in dusty environments, for example, on a windy beach.
when your fingers are wet.
in some extreme weather conditions, for example, when itís snowing or raining.
in fresh (non-saline) water depths of 1.5 metres or less, for example, in a fresh water lake or river.
in a chlorinated swimming pool.