NPC Sororities at OU are:
Alpha Phi (newly recolonized)
Alpha Gamma Delta
Alpha Chi Omega
Alpha Omicron Pi
Gamma Phi Beta
Delta Gamma
Delta Delta Delta
Kappa Alpha Theta
Kappa Kappa Gamma
Pi Beta Phi
Phi Mu (closing)
Chi Omega
NPC Sororities at OSU are:
Alpha Delta Pi
Alpha Chi Omega
Gamma Phi Beta
Delta Delta Delta
Zeta Tau Alpha
Kappa Alpha Theta
Kappa Delta
Kappa Kappa Gamma
Pi Beta Phi
Phi Mu
Chi Omega
University of Tulsa:
Chi Omega
Delta Delta Delta
Delta Gamma
Kappa Delta
Kappa Kappa Gamma
Kappa Alpha Theta
You can find all NPC sororities at all Oklahoma schools in
this thread.