  Parton percolation provides geometric deconfinement in the pre-equilibrium
stage of nuclear collisions. The resulting parton condensate can lead to
charmonium suppression. We formulate a local percolation condition viable for
non-uniform collision environments and show that it correctly reproduces the
suppression observed for S-U and Pb-Pb collisions at the SPS. Using this
formulation, we then determine the behavior of J/Psi suppression for In-In
collisions at the SPS and for Au-Au collisions at RHIC.
