It amazes me that a standard is needed for a product consumed by the littlest of us, but apparently it’s necessary. Apparently one part in a million is safe enough; as was set by the FDA this month.  This is a pull-back from the FDA’s initial standing:

“ The agency had left the impression of a zero tolerance on Oct. 3 when it stated: "FDA is currently unable to establish any level of melamine and melamine-related compounds in infant formula that does not raise public health concerns."

Melamine was traced to four infant deaths in China due to contamination, and two samples of US made infant formula were found to have traces below the new standard.  Read more here:http://www.physorg.com/news147111214.html