Colorado’s Radiation Levels are the Highest in the World

Colorado Radiation Levels National Radiation Map

Colorado radiation levels are currently the highest in the world according to the Radiation Network based in Prescott, Arizona which has released a real-time map of the United States showing current radiation levels as reported by the GeigerCounters.

The state of Colorado seems to be almost double if not triple the radiation level from other states, and here we thought it was California that would be in trouble first.

You may read some media propaganda stating Colorado’s radiation levels are high due to the elevation of the state. If this was truly the case wouldn’t we similar results in other states and countries above 5,000 feet in elevation? Food for thought, keep reading to learn more :

How to Read the Map showing Colorado Radiation Levels

The numbers represent radiation Counts per Minute (CPM), including environmental radiation from outer space as well as from the earth’s crust and air. Depending on your location within the US, your elevation or altitude, and your model of Geiger counter, this background radiation level might average anywhere from 5 to 60 CPM, and while background radiation levels are random, it would be unusual for those levels to exceed 100 CPM. – Currently, parts of Colorado are reading 64 CPM as of 4:00 pm MST 4/10/11.

Thus, the “Alert Level” for the National Radiation Map is 100 CPM, so if you see any Monitoring Stations with CPM value above 100, further indicated by an Alert symbol over those stations, it probably means that some radioactive source above and beyond background radiation is responsible.

So What Now?
Were not going tell our readers to stay indoors as we are all active people. For the most up to date radiation in Colorado, levels and more please be sure to visit: and keep in mind this data is updated every minute 24 hours a day. Stay healthy..

radiation map

Who would ever thought that Colorado, located up in the in the rocky mountains would have the highest background radiation in the world? What are your thoughts on the findings above? Be sure to leave a comment below.

About the Author

Mike Hardaker
Mike Hardaker grew up surfing and snowboarding in Orange County and followed his love of surfing to Hawaii before eventually moving to the mountains to concentrate on snowboarding. He went on to found Mountain Weekly News based in Jackson, Wyoming.

16 Comments on "Colorado’s Radiation Levels are the Highest in the World"

  1. scott clauss | May 12, 2022 at 7:37 PM | Reply

    Ramsar Iran has Colorado beat by quite a bit.

  2. So many morons. It called Uranium. The Rockies are full of it, thus higher background radiation levels.

  3. This aged well..

  4. You can’t talk of CPM this way.
    You must measure H*(10) Equivalent Dose.
    CPM and CPS count depend by the detector. there is no such thing as CPM alert level. If I use a scintillator I could get 900 cpm where my tube measures 20…

  5. No they aren’t. They’re high, but there are lots of places that are higher:

  6. Harry S Truman | April 4, 2016 at 3:11 PM | Reply

    You are all idiots that have no idea what you are are talking about.


  7. It just blows me away that no one seems to correlate the Rocky Flats Nuclear Weapons site with the high radiation levels in Colorado. The plant operated from 1951 to 1994, and had some of the worst plutonium fires in the history of planet earth, leaving giant plumes of radiation spreading over Denver’s suburban communities. Tonnes of radioactive waste are sitting beneath 3 feet of soil on 11,000 acres of windswept land 9 miles from Boulder. Plutonium has a 24,000 year half life, and is not deemed safe for humans until after about 500,000 years. Read “Full Body Burden” if you can still sleep at night, or have children.

    • The issue of radiation is not as simple as “there was a plant”. Radiation is present in many forms and the decay structure is complicated and ever changing. So, the question should be what type of radiation are we talking about and what is the source.

      • Mike Hardaker | April 17, 2015 at 10:46 AM | Reply


        I agree, radiation is around us everywhere. Honestly the levels are far to high. As someone mentioned we believe the atmosphere around Colorado is capturing these emissions due to the height of the mountains?

        Hence why near bye states have lower levels?


    • It blows me away that people do.

  8. Uhh… When I first started looking at these numbers a little over a year ago most sites said that over 60 cpm was rare even at higher altitudes. Most readings were 13-16 avg and upto 30 cpm could be caused naturally. Looks like we are double what I saw these maps looking like a year ago. I just got my inspector alert and I’m barely going below 20cpm, which is the opposite of what I heard people say a year ago. We’re Fukushimmed.

  9. Cam Worftner | April 6, 2012 at 7:04 AM | Reply

    I toured the japanese power plant for the U.S government back in the late 70’s.
    Telling the CEO about the possibility of flooding in the generator station.
    Suggesting mounting generators on the roofs. His reply, they will rust.
    So I suggested a power cord to the roof, he said that he would think about it.
    I later found out his parents and entire family were killed during wwII.
    Resentment is a powerful tool that spans life times.

  10. I realize I’m a little late to comment here, but it is no surprise that Colorado has higher radiation readings than all the other states and it has nothing to do with Fukushima. The higher background is because the thinner atmosphere (higher elevations) provides less shielding against cosmic radiation from space. The national radiation map on this page is not likely to have given any indication of radioactivity arriving here from Japan because the levels are so small that any readings would be lost in the random fluctuations of the background rad field. This is probably a good time to mention that although Colorado has the highest average background radiation levels in the US, the state has some of the lowest cancer incidence and death rates in the country, around 10% below national levels.

    • Mike Hardaker | June 22, 2011 at 9:06 AM | Reply


      Thank you for taking the time to comment, never to late!! Very interesting info especially the part about Colorado’s cancer level? I wonder if all the active healthy people in the state also play into that figure. It makes sense that higher elevation = a thinner atmosphere.


  11. it would be smart to put healthy iodine in our thyroid glands

    • Mike Hardaker | June 3, 2011 at 8:15 AM | Reply


      Thanks for the comment, we have been hearing things on both sides good and bad.


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