Yes, SEGREGATING is a Scrabble word!

Letter values in Scrabble US: S 1, E 1, G 2, R 1, E 1, G 2, A 1, T 1, I 1, N 1, G 2.

Is it a valid word?

SEGREGATING is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

separate by race or religion; practice a policy of racial segregation
divide from the main body or mass and collect
separate or isolate (one thing) from another and place in a group apart from others