Thanks for everyone's advice.
I was very hesitant to call because I was worried about the reprocussions of doing so, like I know I'm not as scared as I should be though.
The pregnant girl is with them in the garage as they are smoking pot and drinking. I went to highschool with her and she was a hardcore partier, but I cannot say 100%. Even if she isn't smoking it, she's still breathing it in and there is a 3 year old girl living in the upstairs part that shares the ventilation system and the mom is constantly drinking. I don't think its a very safe environment.
I live ina nice, quiet neighbor hood except for the other tenants in my building. I'm sure they don't appreciate this either, because they just leave empty beer boxese on the groud ourside and are loud at all times at night, just plain disrespectful.
The guy(about 24 yrs old) is also on probation. He just spent the last 3 years in jail for drug related charges, so you'd think he'd be more causious.
Oh and tonight, I finally figured out who their dealer is, so the next time her comes, I'm going to take his license plate number down and report him aswell.
Thankfully I know people at childprotective services and I think that this will get straightened out soon.