Early war Allied depth charges were good to about 300 feet. By the end of the war the Mark X** could be set for as deep as 1500 feet.
http://www.navweaps.com/Weapons/WAMBR_ASW.htm
Japanese depth charges could be set for 25 or 50 metres - nothing in between. Later models could be set for 30, 60 or 90 metres, and nothing in between.
http://www.navweaps.com/Weapons/WAMJAP_ASW.htm
Airborne depth charges seem to have always been set for 25 feet (roughly 8 metres).