WSU posted a 3.45 team GPA this past spring.
The 12 signees will join WSU this fall.
The Cougars recorded 35 WSU Top-10 times and two school records throughout the season.
Cougars have five teams with perfect single-year scores in 2017-18.
Cougars rewrite the WSU Top-10 this season.
Duarte clocks a 1:06.63 in the 100 breast.