The FDA released a statement that product can be pulled off the shelf if levels of arsenic are greater than 10 parts per billion. This level is the same, acceptable level that drinking water must adhere to.
The FDA updated its standards from 23 parts per billion which was set in 2008. Consumer groups have raised this issue over the past few years and the FDA decided to be proactive and take steps to keep the arsenic levels in check. More information can be found in this article, FDA sets new limits on arsenic in apple juice, July 12, 2013 – Matthew Perrone
Arsenic is considered a cancer causing agent.