While some communities have attempted to restrict where sex offenders live, there's no law restricting how many can live in certain areas.

Target 11 took the information on the state's Megan's Law Web site and mapped out all of the sex offenders living in Allegheny County. Many communities have only a handful, but others have many registered sex offenders living on their streets.

There are two categories of registered offenders: sex offenders and sexually violent offenders. A violent offender is determined by the courts to be more likely to engage in predatory sexual offenses.

When violent offenders move into a neighborhood, local police are alerted. They are required to notify schools and day cares in the area.

In Pennsylvania, there are 10,000 registered sex offenders. The site shows 740 of them live or work in Allegheny County, but many of them are clustered in certain communities.

49 live on Pittsburgh's North Side 44 in Mckeesport. 36 in Wilkinsburg. 32 in East Liberty. 24 in Carrick and Knoxville. 23 in Penn Hills. 20 in Carnegie. 18 in Lawrenceville. 17 in Crafton and Crafton Heights. 17 in Ross Twp. and McCandless. 16 in Homestead. 16 in Hazelwood and Greenfield.

"I think it's outrageous to have that many people in this small city," said Sonnie Donelson, who lives in McKeesport.

"They're mostly down on our street," said McKees Rocks resident Harriet Sweger.

"It's alarming. It is alarming. I didn't notice it was that big of a difference than other areas, said Kari Barrett of McKees Rocks.

We wanted to know why the numbers are so high in neighborhoods like McKeesport and McKees Rocks?

"The location has one thing to do with it and quite honestly there's probably a number of affordable housing units," said McKees Rocks Police Chief Robert Cifrulak.

In addition to affordable housing, Cifrulak said both communities are situated on bus routes that provide relatively easy access to social and human services that ex-convicts need. Cifrulak said he's well aware of the sex offenders living in his community.

"Our philosophy is we want our residents to take advantage of all that information that is available, like the megan's law web site, we want them to be safe we want them to be aware but the residents here are also very aware that these folks are entitled to live their lives," Cifrulak said.

Target 11 Investigator Rick Earle spoke to a registered sex offender who said he did his time and just wants to become a productive member of society. And he said that there's a big misconception about the web site. He said most people think that anyone on the web site has committed a crime against a child, but people convicted of crimes such as sexual assault and rape involving adult victims are required to register as well.

"I just want to live my life. If you want to protect your kids, you protect your kids. I'm not looking for your kids. I'm a sexual offender. I'm not a designated sexually violent predator. I'm a sexual offender. there's a difference. People don't understand that, " he said.

Regardless of their classification, registered sex offenders are required to check in with state police in person once a year. Sexually violent offenders are required to check in four times a year.

Target 11 has discovered some big changes on the way mandated by the federal government. Those changes will create three classifications of sex offenders and they will be required to register from 15 years to life depending on the seriousness of the crime.