There is no single “acceptable” ACT score, because each college sets its own expectations. You can find a school’s typical score range by reviewing its admissions website or looking at ACT score profiles from previous admission cycles. To find the latest data, Google "College Data Set" + the school name, and look for the most recent year.
However, it’s important not to treat a school’s average or median ACT score as your target score. If your score is at the median, that means half of the applicants scored higher than you, which can make your application less competitive.
A more strategic goal is to aim for the 75th percentile ACT score of admitted students for that specific college. Scoring at or above this level puts you in a stronger position and helps ensure your test score supports your application.