It's significant that there is this advice, and it supports the point of the article, but this is really insufficient. If you can't be sure of the water quality at the tap (as parent notes, different from the quality at the plant where the utility measures contaminant levels), then it's best to use a filter that removes metals (as well as biological contaminants).

Also people should be aware: the government somehow allows pipes and fittings to be sold as "lead free" when in reality they contain up to a few percent of lead.