The dirtiest Websites are sites that feature adult content. This, according to Internet security company, Symantec, which has come out with a list of the Dirtiest Web Sites of Summer 2009. The company has published a list of the top 100 infected sites based on the number of threats as of August 2009.

Some of the filthy facts cited are:
* Average number of threats per site on the Dirtiest Websites list is roughly 18,000, compared to 23 threats per site for all sites rated by Norton Safe Web

* 40 of the Top 100 Dirtiest Sites have more than 20,000 threats per site

* 48% of the Top 100 Dirtiest Web sites feature adult content

* 3/4 of the Top 100 Dirtiest Web sites have distributed malware for more than 6 months

* Viruses are the most common threat represented on the Dirtiest list, followed by Security Risks and Browser Exploits

And as the company explains, “Simply clicking through to a site with these threats could put you at risk of exposing your computer to infection, and worse, put your identity, personal and financial information into the hands of cybercriminals.”

A quick check of the WebGuild site shows that it is totally safe: