Www and non-www

[bradleymiller148]

I have a site that has used both www and non-www urls since inception years ago.  Moz is saying that I have 183 pages of duplicate content, and it is all because each internal link has both versions.  Both versions have high PR and links going back to them...should I still 301 redirect to one of them or should I leave them be?

Thanks

Brad

[Ray-pp]

You should choose a single URL and 301 all other versions to that single chosen URL. If you keep them the current way, they are seen as duplicate content.

Make sure to configure your Google Webmaster Tools for the single domain, as well as, adjusting your Google Analytics to read the home page properly.

[Bryan_Loconto]

I agree with my man Ray from Compton! You should choose one URL (my preference would be the non-www since it is shorter) and set everything else to redirect there to avoid the duplicate issues you're seeing in Moz.

Cheers!

[bradleymiller148]

Thanks Ray and Bryan! My only question then is what will happen to all of the PR and rankings of the pages that I choose to redirect? Will I lose that?

[Bryan_Loconto]

No problem Bradley!

The redirects will pass authority but not 100% of it. I wouldn't worry too much about it honestly. Here is a post on the topic, its a bit old (2012) but hopefully it helps explain in more detail.

http://moz.com/community/q/how-much-juice-do-you-lose-in-a-301-redirect

Cheers!