Eighty collegians and one honorary initiate became charter members of Eta Rho chapter at Chico State on May 5, 1990. The collegians were selected from 250 applicants. As a colony, members from other sororities served as big sisters from the group, while the group paired themselves as Pi Pals for studying and special events. The chapter has worked closely with Eta Mu chapter at CSU at Sacramento. They have a rented home that was built by an investor with the specific purpose of renting to the chapter. It houses about 20 members and provides space for meetings and other events. Nan Brown Timmons, Epsilon Zeta - Texas State, was a long-serving advisor.