The US can simply be described as a "Governmental Agency Quagmire" with regards to recalls. Technically, all recalls from US-based companies are voluntary. Federal agencies can 'recommend' recalls, but the actual event and press releases are issued by the offending companies. It gets a lot more complex when the companies are guided by more government entities in their operations. A state that self-regulates may be able to issue recalls, but it doesn't generally roll up to a federal recall recommendation unless those products have a likelihood of crossing state lines, either with raw materials coming in, or finished goods going out. Typically in those circumstances, the federal agencies have influence and control due to the inter-state nature.
As with prior posts, your best friend in starting your search for USA recall information is google. I did a quick lookup using "product recall fda, usda, cdc" and received roughly 65K hits. I use the site and the widget on my site found at
http://www.recalls.gov/food.html to keep up with most recall alerts.
The agencies I reference also issue quite a bit of traffic via Twitter.
FDA - Food and Drug Administration
USDA - US Department of Agriculture
CDC - Centers for Disease Control