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March 31, 2011 in City
Radon in Spokane homes more of a risk than milk
The detection of trace amounts radioactive isotope Iodine-131 this week in milk being sold in Spokane has raised anew questions about the extent of radiation exposure from the Japan nuclear crisis.
But officials say people are exposed to more radiation in their homes each day than from drinking milk.
The Spokane area has higher naturally occurring radiation levels than other parts of the state, but that is mostly due to elevated radon levels in the soil, said Dr. Joel McCullough, Spokane County health officer.
Indeed, homeowners here have been urged for decades to have their homes tested for radon, which can be abated.
There is no danger from milk in this region, officials said, nor is there a radiation danger posed by drinking water or precipitation.
The Environmental Protection Agency tests milk at 30 locations across the country every three months, said spokesman Mark Macintyre. The federal agency has bolstered testing in Western states in response to the Japan nuclear accidents, and McCullough said that he anticipates more frequent testing in Spokane.
The tests were taken from milk samples collected by the Washington state Department of Agriculture, which pulled one gallon from a Darigold distribution center in Spokane County.
Darigold is the dominant dairy cooperative in the region, collecting milk from throughout Eastern Washington and North Idaho
McCullough said the milk sample was run through several hours of testing to obtain the most accurate radiation readings. Such sampling usually takes just minutes.
The sample revealed that the milk had 0.8 picocuries of Iodine-131 per liter, an infinitesimal amount that poses no public health risk and no public health concerns for regulators, McCullough said.
Picocuries are units of radioactivity. It would take 4,600 picocuries per liter for milk to be considered unsafe.
Iodine-131 has a half life of about eight days, thus the levels detected are expected to drop quickly.
Health officials have not yet said whether they can link the radiation to the Fukushima Dai-ichi nuclear plant in Japan that was damaged by the magnitude 9.0 earthquake and then swamped by resulting tsunami.
EPA has been conducting quarterly tests on milk since 1978, Macintyre said.
Spokane also is home to a RadNet air monitoring station.
EPA officials have attempted to quell concerns of radiation poisoning, reminding Americans that low levels of radiation exposure is present in daily life.
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de3 on March 31 at 8:44 p.m.
What if we drink 2,000 gallons of local I-131 enhanced milk, while sitting in our homes, which are leaking radon? :-)
(This comment is not meant to be taken seriously …)
zelda on March 31 at 11:02 p.m.
This provides some much needed perspective. Fall-out freak-outs could hurt dairy farmers and agriculture in the Northwest. If a person is that afraid of radiation, it would do them more good to skip one day in the sun this summer (assuming the sun ever comes out again) than to forgo milk.
Dairy farming is a tough way to make a living and the last thing they need in this economy is baseless, frantic fear driving consumers away from food that is safe to eat.
idahocity on April 01 at 7:01 a.m.
question for the reporter about the next radon/milk article to appear tomorrow or next day, would you ask if they are testing for cesium 137 and strontium 90 isotopes as well.