Hello Andrea,
There isn't a public swimming pool on St. Thomas....

we have the ocean.
There is one being constructed on the East End. Its been 'being constructed' for a while now.
Springboard diving - no. I am not aware of a program. Here is info. on swimming if you were interested.
On St. Croix there are swim teams: the Dolphins
St. Croix Swimming Association
(340) 719-7946
and Blue Marlins (340)277-2569
There is a VI Swimming Federation: [
www.visf.org]
Pamela provided the STT group's contact person. I have this number for Kathy (340)779-2500.
There is a program on St. John called Kats (Kids in the Sea) that does water safety, swimming, sailing. [
www.kidsandthesea.homestead.com]
There is another program called Marine Kids Korps. I don't know anything about it but you can call them for information. (340)776-5179.
The Special Olympics are here and I believe they having swimming.
Hope that helps.
--Islander