There needs to be more clarity as to what defines a bathroom. In CA, the law says a woman can't be made to pump in a bathroom but doesn't define what constitutes a bathroom.
My employer has deemed that the space available for lactation purposes is the "shower room" which has a shower stall, sink and drain in the floor at the center of the room. That drain connects to a single toilet men's room on the other side of the wall so you get the pleasure of the sounds of a toilet flushing and various smells while in the shower room pumping. My employer sees no issue with this because "it's not a bathroom" so they feel it's acceptable under the law.
(They also say the primary function is for something else so pumping takes a backseat but that's another issue).