Yep, after searching multiple links it seems that various agencies are involved with her case, but her biggest problem is her mental instability. That has left them in their current position, where they do monitor her. They know where she's living, and try to know the rat population at her residence, so they can step in and handle it when it gets out of hand. (She finds them on her own.)
She was removed from her place at the residential hotel. I think the police's info may be out of date, because it's from the last major sweep. It looks like this info is more current. Since then, she has lived under a bridge (with 8 rats), and has found housing again.
@ethicalcannibal The tame rats were actually part of a group collected by Animal Control, and were adopted out. Others (sick or feral) were euthanized. (It was when the city did a sweep of an infested location that the animals were collected.) It looks like Rat Girl herself does not adopt out rats, and she normally just leaves them behind wherever she was living when she thinks she needs to move.