The Office of Fraternity & Sorority Life doesn't say much -
http://www.union.umd.edu/greek_life/
I was interested to see how many NPC groups are there:
Alpha Chi Omega
Alpha Delta Pi
Alpha Epsilon Phi
Alpha Omicron Pi
Alpha Phi
Delta Delta Delta
Delta Gamma
Delta Phi Epsilon
Kappa Alpha Theta
Kappa Delta
Phi Sigma Sigma
Sigma Delta Tau
Sigma Kappa
Zeta Tau Alpha
The main PH page has some info but no results yet:
http://www.studentorg.umd.edu/pha/index.htm
Random note -- I like college panhellenics with logos (seems very inclusive and pro-greek to me: