Some select information specifically, the monitoring of radiation in milk in North America. EPA is monitoring things, I would like to add that the acceptable levels of radiation is said to have been raised

I am looking for a reliable source...
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Dose examples
Single dose examples
Dental radiography: 0.005 mSv[5]
Average dose to people living within 16 km of Three Mile Island accident: 0.08 mSv during the accident[6]
Mammogram: 3 mSv[5]
Brain CT scan: 0.8–5 mSv[7]
Chest CT scan: 6–18 mSv[7]
Gastrointestinal series X-ray investigation: 14 mSv[8]
International Commission on Radiological Protection recommended limit for volunteers averting major nuclear escalation: 500 mSv[9]
International Commission on Radiological Protection recommended limit for volunteers rescuing lives or preventing serious injuries: 1000 mSv[9]
EPA STATEMENT: Update on Ongoing Monitoring
Release date: 04/02/2011
Contact Information: EPA Press Office,
press@epa.gov
WASHINGTON – As a result of the incident with the Fukushima nuclear plant in Japan, several EPA air monitors have detected very low levels of radioactive material in the United States consistent with estimates from the damaged nuclear reactors. These detections were expected and the levels detected are far below levels of public-health concern.
Elevated levels of radioactive material in rainwater have been expected as a result of the nuclear incident after the events in Japan since radiation is known to travel in the atmosphere - precipitation samples collected by EPA in the states of California, Idaho and Minnesota have seen very slightly elevated levels of radiation.
In addition to iodine-131, EPA monitors have also identified trace amounts of other isotopes, which we expected to see because they are consistent with releases from the damaged Japanese nuclear reactors.
To see results from these precipitation samples, please visit
www.epa.gov/japan2011/docs/rert/radnet-precipitation-final.pdf.
JOINT EPA/FDA STATEMENT: Update on Ongoing Monitoring
Release date: 03/30/2011
Contact Information: EPA Press Office,
press@epa.gov / FDA Press Office,
fdaopa@fda.hhs.gov
WASHINGTON – In response to the ongoing situation in Japan, the U.S. Environmental Protection Agency (EPA) has taken steps to increase the level of nationwide monitoring of milk, precipitation, drinking water, and other potential exposure routes.
EPA conducts radiological monitoring of milk under its RADNET program, while the U.S. Food and Drug Administration has jurisdiction over the safety, labeling and identity of milk and milk products in interstate commerce. States have jurisdiction over those facilities located within their territory.
Results from a screening sample taken March 25 from Spokane, Wash. detected 0.8 pCi/L of iodine-131, which is more than 5,000 times lower than the Derived Intervention Level set by the U.S. Food and Drug Administration. These types of findings are to be expected in the coming days and are far below levels of public health concern, including for infants and children. Iodine-131 has a very short half-life of approximately eight days, and the level detected in milk and milk products is therefore expected to drop relatively quickly.
“Radiation is all around us in our daily lives, and these findings are a minuscule amount compared to what people experience every day. For example, a person would be exposed to low levels of radiation on a round trip cross country flight, watching television, and even from construction materials,” said Patricia Hansen, an FDA senior scientist.
EPA’s recommendation to state and local governments is to continue to coordinate closely with EPA, FDA and CDC. EPA will continue to communicate our nationwide sampling results as they come in.