How could i report a hoarder?

My neighbor has a bad hoarding problem, She also has a son that is mentally restarted, the house is past a hazard for both of them. a room full with newspaper witch can cause a fire hazard. Her son witch is 26 stays home all day while she is at work, he eats little to nothing the whole time she is gone at work. If your standing outside and they open the door it spells like 20 dead animals, even worse. Thats just opening the door. The mom was a drinker, thats why the son the way he is, and this past week she started him on wine, witch is ridiculous even though he is over the legal age, he still shouldn't come any were close to that stuff. The house is a danger to them, black mold all over the windows the garage has water that's been in there for who knows how long. How would i come about reporting this? health department? Its just been going on to long, and its a pain when we have company we have to go back on the pool deck for we don't see and smell the house. The roof and gutters are starting to cave in also. - the guters are hanging off, and the roof is starting to cave in, its all rotten. witch is a big hazzard. if that falls your screwd.