25 schools out of 65 P5 teams total.
Kansas, Iowa, Oregon St, Washington St, UCLA, Illinois, Nebraska, Rutgers, Duke, Miami (Diving only for men), and Vanderbilt (swimming only) only have women's programs.
Baylor, K-St, Oklahoma, Ok St, Texas Tech, Colorado, Oregon, Washington, Maryland, Clemson, Syracuse, Wake Forest, Ole Miss, and Mississippi St don't have either men's or women's swim/dive teams.