The FCC and government put little to no censorship on websites or on the internet at all.
“Private Internet connections in the United States are not subject to technical censorship, such as content-control software imposed by the government. However, private businesses, schools, libraries, and government offices may use filtering software at their discretion, although in such cases courts have ruled the use of such software is not censorship.”
Cite: http://www.censorshipinamerica.com/p/history-of-censorship-in-usa.html
However, there have been monitored Google or web searches for key words but that is for national security.