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History of Indoor Radon in Iowa

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History of Indoor Radon in Iowa Powered By Docstoc
					   Iowa
IAQ/Radon
 Program
 Rick Welke, Mgr.
 Radon Program
     515-281-4928
  rick.welke@idph.iowa.gov


www.idph.state.ia.
 us/eh/radon.asp
Why is Radon Dangerous to Your Health?

It is the first leading cause
of lung cancer in nonsmokers.



It is the second leading
cause of lung cancer overall
after smoking .


It   is a Class A carcinogen.
    Radon’s Characteristics
• Radon is a radioactive gas left behind during
  the Glacial periods that comes from the
  spontaneous radioactive decay of uranium and
  radium that are naturally occurring and
  ubiquitously spread throughout the upper soil
  layer in Iowa.
• It cannot be detected by human senses
  – Colorless, Odorless, and Tasteless
• Inert gas (does not chemically react)
• No Static Electrical Charge
 Uranium-238        Radon-222     Bismuth-210
                                   
 Thorium-234       Polonium-218   Polonium-210
                                   
Protactinium-234    Lead-214       Lead-206
                             (Stable)
 Uranium-234       Bismuth-214
                       
 Thorium-230       Polonium-214
                       
                                  Uranium 238
  Radium-226         Lead-210     Decay Series
                       
Radon Compared to Other Risks
           Radon in the US homes causes about 22,000 lung
           cancer deaths per year - In Iowa, EPA estimates there
           are about 399 deaths annually from exposure to radon
  25000
            - more than
                drownings
  20000         home fires
                airline crashes
  15000


  10000


   5000


     0

    Drunk Home Drowning               Home Airline
    Driving Radon                     Fires Crashes
  U.S. EPA Comparison of
    Environmental Risks

                           Annual
                        Cancer Deaths

Pesticide Applications        100
Hazardous Waste Sites       1,100
Toxic Outdoor Pollutants    2,000
Pesticide Residues on Food 6,000
RADON                      22,000
   Sources of Radiation Exposure to
   the U.S. Population
                                           Assumes average
 Radon
  55%                                       indoor radon
                        Medical X-Rays
                                            concentration of 1.3
                             11%            pCi/L.
                          Other
                           1%
                                           Radon is by far the

                         Internal           greatest single source
                           11%
                       Nuclear Medicine
                                            of radiation to the
                             4%             general public.
                     Consumer Products
Cosmic
 8%
         Terrestrial        3%             IA/w 8.5 pCi/L Avg.
            8%
                                            ~ 75%                  42
  WHY IS RADON AN
     IMPORTANT
ENVIRONMENTAL ISSUE
       IN IOWA?
     “Iowa has the highest
    portion of homes with
 elevated indoor radon in the
             U.S.”
 “5 out of 7 homes test high”
Radon in Iowa Homes
   January 1988
Radon Zone Map




                 Legend
                    Zone 1
                    Zone 2
                    Zone 3
Testing is the only way to know if
you and your family are at risk
    Why Does Radon Get Into Your
              Home?




Radon is sucked
  Radon from the soil
 indoors is sucked indoors from the soil
    What If My House Has?……..
   You cannot predict radon levels based on:
   Heating System
   Foundation Type
   Age of Structure
   Air-tightness
   Style of House
   Presence of sumps, cracks or other features
   You just have to test to find out!
•EPA and IDPH recommend you mitigate or fix a home
when you find radon levels at or over 4 pCi/L.
•Remember -- Radon levels can be reduced!!
    Where do You Find A Radon Test Kit ?
   Call 800/383-5992: ALA sells ST kits for $10
   and LT kits for $25.
 Go to your County or City
 EH or Public Health Office
(many sell ST kits for $5-10).
 Go to your local retail store
  (many sell ST kits for $15-20).
   Do not buy from Menards/or retail selling Prolab

   Google: Iowa Radon Program.
   Click on I feel lucky, and find the list of licensed
    radon measurement specialists ($100-150; test results
    in 48 hours)
       Homes With High Radon
           Concentrations
         Can Be Remediated




Active soil depressurization is a means of
creating a vacuum beneath a slab or plastic
sheet and collecting the radon before it enters a
building.
THE END

				
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