I saw the study that was done that found similar contaminate levels for samples taken from both large and small municipalities, but I'd still tend to think that Glacier Gold, which comes from Olney, Montana, would be a relatively safe bet. Not only is the sludge coming from a very small community, with a very small level of industry, but it is also being fed with water that is about as pristine as one can get. They are very close to the continental divide.
All of the rest of them on that list seem to be not only in large municipalities, but HUGE ones... the ones that are the biggest in America: New York, Philly, LA, Seattle, Houston, Milwaukee, Boston, DC, etc. etc. I can't imagine there isn't a difference.
Does anyone have a list of commercial compost products that AREN'T made from sludge??