Low VOC water-based polyurethane

Q: All of the green building references I have found say that wood floors should be finished with a low VOC water-based polyurethane, but none of these articles provide recommendations for a brand.

Is there a website which provides this information or can you provide the names of some products that are on the lower end of the VOC scale?

A: www.duraseal.com, bona kemi, www.basiccoatings.com