Hi @eandesmom I wonder if Dickinson in Carlisle, PA might be worth a look? His ACT would fall below the 25% line but Dickinson is test optional. It has a good program in Environmental Science/Studies and the campus emphasizes sustainability, locally sourced food (some from its own organic farm), etc. I don’t know how generous their need-based aid is or if it would work for your budget. They do offer merit scholarships, but in that case, they do want test scores. There is an EA admissions round.
I have not visited the campus but my research has led me to believe that there is a mix of students and while Greek life is visible it is not overwhelming. The town of Carlisle has been recognized in “most walkable/most bikeable” surveys and opportunities for outdoor recreation are not far away. Their internship and career placement office is said to be very good.
I know that he’s vetoed Ohio but from my point of view I don’t see a whole lot of difference between PA and OH, especially if he’s considering Allegheny College! 
If he changes his mind, I can steer you towards some good OH options.