Each school’s most recent Common Data Set will say the number of years they require or recommend for each subject. (Some say one or the other, some say both.) Requiring or recommending 3 years of science with 3 years of them lab classes is pretty common. Some (like NYU) recommend 4 years with 4 years of lab.
I don’t know if Living Environment counts as a lab, but it sounds like you may be at the minimum for required, but not necessarily for recommended for everybody. Sorry to say, but it may be a class like Physics (and non-AP would be sufficient) is the only sure way to have as much science as anyone could possibly expect.