An Update on Global Radiation Poisoning from Fukushima

How has the US government reacted to the radiation disaster in Fukushima? Has the US goverment raised acceptable standards for exposure to radiation?  Has the US goverment warned the public of radiation contamination of all water sources?
http://www.washingtonsblog.com/2013/04/government-reacts-to-fukushima-radiation-crisis-by-raising-acceptable-radiation-standards-instead-of-fixing-anything.htm