Radon Services in Spokane and Coeur d'Alene since 1986

Licensed in Washington and Idaho

Welcome to Cavalier Radon's web site. This site offers you the opportunity to learn more about Cavalier Corporation, which was founded in 1986. We specialize in Radon Reduction and testing.

To learn more about us, click any item on our menu. If you have comments or questions, let us know by clicking Contact Us or calling Cavalier Radon's Spokane office at 1 800 323 3853 or 509-926-6217. Thanks for visiting and be sure to check back often for updated information.

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Radon Mitigation prevents soil air with radon from entering your home thru the concrete slab floor or the crawlspace. Radon mitigation does NOT remove or dilute the radon gas after it has entered the home. Radon mitigation does not therefore add to your heating and cooling costs. Radon fans typically use only 60 watts of electricity. Our systems are quiet and can often be fully hidden within the structure. Radon mitigation is also known as removal, reduction, remediation, repair and radon prevention.

Owners: Warren and Sylvia Riddle

We are lifetime residents of Spokane and have provided full radon services since 1986. We value our town and our customers who have appreciated our guaranteed services. Buy local from Cavalier. We are fully licensed, insured and credentialed in Washington and Idaho

Our written guarantee reads:

Cavalier proposes to install the permanent radon system described below and to guarantee that radon levels below 4 pCi/l will be achieved, as tested in any season with any EPA approved test kit or test agency"

In some cases we provide a guarantee below 2 pCi/l. It is rare that we cannot provide in our firm bid a guarantee below 4 pCi/l.

The American Association of Radon Scientists & Technologists

press release


ST. LOUIS - In simultaneous releases published around the globe today, the World Health Organization (WHO) called for stronger action against indoor radon, the leading cause of lung cancer among U.S. and Canadian non-smokers.

The central WHO recommendation is to lower radon gas levels by one-third below the current U.S. guidance. The lower WHO action level doubles the number of U.S. homes needing radon control systems from 8 million to 15 million.

According to Bill Angell, President of the American Association of Radon Scientists and Technologists (AARST), "The WHO recommendations more strongly emphasize the importance of radon testing by all home owners and home buyers and reduction of high concentrations of the radioactive gas."

Speaking from the 2009 International Radon Symposium, Angell adds, "The World Health Organization's strong stand is based upon new evidence of the risk posed by toxic radon." The new WHO Handbook on Indoor Radon: A Public Health Perspective lists the consensus of scientists from more than 30 countries that radon in homes is responsible for about one of every seven lung cancer deaths in countries such as the U.S.

Over 21,000 Americans die each year from radon induced lung cancer.

In the handbook, WHO recommends a threshold of action of 2.7 picocuries per liter (pCi/L), a measure of radioactivity.

The new threshold contrasts with the U.S. Environmental Protection Agency (EPA) level of 4 pCi/L; an action level that has been in place for 40 years.

In addition to testing, the WHO handbook notes that indoor radon is the result of the way we design and build homes. Thus, WHO places clear responsibility for radon exposure on architects, builders, and real estate professionals and urges radon control system in new homes and testing homes for sale.

Elevated indoor radon may be inexpensively fixed or prevented through radon control systems installed by certified or licensed radon professionals.

The American Association of Radon Scientists & Technologists

Peter Hendrick, Executive Director

14 Pratt Rd, Alstead, NH 03602