Their websites will have that information. If not, you can just call em :)
more than likely, they will have the average score available. if it isn't their policy to discard apps with a score lower than a predetermined minimum, then that's all they can tell you, really.
i can't think of any school that has minimum score requirments, they all probably have average scores for people who are accepted, i guess that's a good indicator of what score you should get to be a competative applicant. Anyway, just look it up at www.collegeboard.com.