Jan, your best bet is to always get a first hand opinion especially in an area you are considering living in. There are plenty of resources out there that will help you make an educated decision. First and formost is always the towns website. Statistics will be posted on there. Also, I always recommend to anyone who asks questions like this to drive around the area. Do it at various times of the day, weekdays, weekends, etc.
If you need any additional advice or are not already working with a Realtor and would like to view some properties give me a call. I am quite familiar with Bellwood and the surrounding Western burbs and its hidden gems.