why is water leaking on the passenger side of the car?

Have the a/c condensation drain tube unclogged! ... Local auto repair facility can hoist vehicle to clear drain and release all that water out onto the ground .. Then your problem is solved.

it's either what pushrod said or the hose has came loose from a passengers left foot hitting it and knocking it loose(bad design). copy and paste the video link below,watch the short video,if needed put duct tape around it to keep from coming off again,if your is off and not clogged. https://www.youtube.com/watch?v=fLGdh9nnpKw