The answers were very helpful, I ended up using the AVG website scanner. First I used it on our website and found it was clean, then used it on a website we suspected and it came up with 'Potential Active Threats'(link to the report).
My organization represents Sheep Farmers in Ontario and if this website is a serious we need to report it.
However I need to know before hand, how credible is the Potential Active Threat alert from AVG? They seem like a credible company and the analysis even lists the potential threats(Blackhole Exploit Kit, and Javasript Obfuscation). I don't want to come out with a warning about the website for our Farmers and have it back fire if there really isn't a threat.