Radiation Levels in California
WASHINGTON – During a detailed analysis of four west coast RadNet air monitor filters, the U.S. Environmental Protection Agency (EPA) identified trace amounts of radioactive iodine, cesium, and tellurium consistent with the Japanese nuclear incident. These levels are consistent with the levels found by a Department of Energy monitor last week and are to be expected in the coming days.
EPA’s samples were captured by three monitors in California and one in Washington State on Friday, March 18 and sent to EPA scientists for detailed laboratory analysis. The data was reviewed over the weekend and the analysis was completed Monday night. The radiation levels detected on the filters from California and Washington monitors are hundreds of thousands to millions of times below levels of concern.
In addition, last night preliminary monitor results in Hawaii detected minuscule levels of an isotope that is also consistent with the Japanese nuclear incident. This detection varies from background and historical data in Hawaii. This isotope was detected at our fixed monitor in Hawaii, and it is far below any level of concern for human health. The sampling filter from this monitor is being sent to our national radiation lab for further analysis.
In a typical day, Americans receive doses of radiation from natural sources like rocks, bricks and the sun that are about 100,000 times higher than what we have detected coming from Japan. For example, the levels we’re seeing coming from Japan are 100,000 times lower than what you get from taking a roundtrip international flight.
EPA is in the process of conducting detailed filter analyses for fixed monitors located in Oregon.
EPA’s RadNet filter results for San Francisco, Seattle, Riverside and Anaheim, California detected minuscule quantities of iodine isotopes and other radioactive particles that pose no health concern at the detected levels. Below are the results of the detailed filter analysis. All of the radiation levels detected during the detailed filter analysis are hundreds of thousands to millions of times below levels of concern.
All units are in Picocuries per meter cubed.
- Filter results for Anaheim, Calif. found:
- Filter results for Riverside, Calif. found:
- Filter results for Seattle, Wash. found:
- Filter results for San Francisco, Calif. found:
EPA’s RadNet system is designed to protect the public by notifying scientists, in near real time, of elevated levels of radiation so they can determine whether protective action is required. In addition, an analysis of the filters in the monitors can identify even the smallest trace amounts of specific radioactive isotopes.
As part of the federal government’s continuing effort to make our activities and science transparent and available to the public, EPA will continue to keep RadNet data available at: http://www.epa.gov/japan2011/
Print This Article
Placer County News HeadlinesJustice Center in Roseville Refinancing Boosts County RatingPlacer County earned a significant savings and a higher credit rating recently when it refinanced municipal bonds originally issued to help finance construction of buildings in North Auburn and Roseville
Big DoG Countdown: Placer Food BankBig DoG Countdown: Learn about how Placer Food Bank impacts your community.
Featured Rocklin Student: Sierra GarridoRocklin, CA - Sierra Garrido, a member of Rocklin High's Class of 2015 Honor Guard, balances her vigorous academic schedule, time with the dance team, and volunteer projects. Sierra is
Seeking Grants for Ophir Gardens Vulnerable Water SupplyDrought Watch: Directors of the Placer County Water Agency on Thursday (Apr. 10) agreed to apply for two emergency funding grants, each up to $500,000, to improve water supplies for a small community
Free Soccer Camp in Roseville for Kids Ages 8- 13The Roseville Police Activities League and Folsom Police Activities League will be hosting a free two-day soccer camp on April 15- 16, 2014.
$45,000 Raised for Child Abuse PreventionIt was a "Blue Tie Affair" on a recent Thursday in Roseville, as more than 200 people gathered for KidsFirst's 16th annual luncheon, celebrating their 25th commemorative anniversary and kick-off their community-wide campaign to end child abuse
Big DoG Countdown: WarmLine Family Resource CenterBig DOG Countdown: Learn about how WarmLine Family Resource Center impacts your community.
Featured Rocklin Student: Nick HuddlestunNick Huddlestun, a member of Rocklin High School's 2015 Honor Guard, is a hardworking and genuine student who always strives to do his best on the field and in the classroom.
Construction to Impact Downtown Roseville Parking Limited construction activities begin today, Monday, April 14 on the Oak Street Improvement Project, including partial closure of the Oak Street parking lot.
Customers Urged to Conserve WaterDrought Watch: Directors of the Placer County Water Agency last Thursday adopted a series of water use regulations and restrictions and appealed to all customers to conserve water...
Placer County Supports Assembly Bill 2703Placer County considers itself exemplary when it comes to honoring the men and women who have served their nation as members of the armed forces
Lexus GS 450 Hybrid: Expect GreatnessSay hello to the 2014 Lexus 450h, which gobbles up the pavement in rapid style, going from 0-60 mph in 5.6 seconds, a time that is impressive for any vehicle, much less a hybrid