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Dear Leo:
Enclosed is the payment for the radon mitigation you performed at our home.
Thank you so much for the professional job. We would not hesitate to recommend your company to anyone with a radon problem.

Thanks again,

Margaret P.

Radon Health Issues

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Quest for Quality

Learn more about the founder of Radon Home Measurement & Mitigation
Learn more about the founder and President of R.H.M.M.
Dr. Leo Moorman Ph.D.

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1: Radon in Well Water

Radon may occur in well water or water from public sources (Community water Suppliers). As of this moment no regulations or guidelines are applicable in Colorado. The EPA has for over a decade indicated that it will adopt guidleines for companies that deliver water to teh public.  For states that implement a multimedia mitigation (MMM) program (i.e. inform the public that radon
can be caused by various sources: soil and water) the radon concentration level may be 4000 pCi/L 
(per liter of water). This is known as the Alternate Maximum Contamination Level (AMCL).

For states that do not implement a multimedia mitigation (MMM) program the level will probably 
be set at 300 pCi/L (per liter of water). This is known as the Maximum Contamination Level (MCL).

In comparing the guideline for the action level concentration of radon in air - 4 pCi/L (per liter of 
air) - with the action levels in water as indicated above there is a large difference because of the 
higher density of water than air. For example from previous scientific studies it was derived that 
on the average every 10,000 pCi/L per liter water in a home contributes approximately 1 pCi/L per 
liter of air to the indoor air environment.

For this reason it makes sense to test the well water in a home where high indoor air levels exist as 
part of the testing before mitigation of the indoor air environment starts. Nevertheless at the same 
time it makes sense to mitigate the indoor air quality based on soil-gas release first, because this 
contribution to the indoor air radon concentration is usually higher.

For example if a well in a house has 50,000 pCi/L per liter water and the radon concentration in air 
is measured to be 45 pCi/L per liter air, the contribution of the radon in water to the indoor air can 
be estimated to be 5 pCi/L. The usual soil type mitigations (ASD such as SSD or SMD) alone (even 
if done completely) will on the average not be able to bring the radon concentration in the indoor 
air in this house down to below 5 pCi/L. Here both types of mitigations would be necessary to reach 
the EPA indoor air Action Level of 4 pCi/L per liter air.

2: Radon in Water Testing

How Can I collect water for a Radon-in-Well-water test myself?


Radon in water testing Contact us via our phone number (970) 416-0196. After a deposit by mail or credit card is processed we can send you three test bottles with instructions how to properly extract water from your well. Send these bottles to us by express mail using enough packaging material around it and the analysis can be done within 24 hours after we get your sample. For fastest result we fax or e-mail the written report. The following photo shows the test emenation process that follows manufacturer's guidelines.

 Test of water for concentration of Radon-222.

3: Radium in well water testing


Contact us via our phone number (970) 416-0196.

See photo below of two sample radium-226 tests.

Radium -226 in water gestingf

We can also perform Radium-in-Well-water tests for you?

 Test of water for concentration of Radium-226

4: Radon in water Mitigation System Example Filtration when original 

radon-in-water concentration levels are under 10,000 pCi/L.

In the case of lower than 10,000 pCi/L effective mitigation can be accomplished by activated carbon filtration. THe source of the carbon and carbon bed are relevant and whether automatic backwashing is applied, to maintain effectiveness ofteh system. Regular monitoring of the increasing gamma radiation level of decay products is recommended. 

5: Mitigation of radon in well water: Aeration technique

Low Noise Radon Mitigation System
Click photo to see more pictures.

In the case of higher than 10,000 pCI/L in teh water we recommend a combination of an activated charcoal filter with aerator.  

Finally the radon in water issue has been causing increased issues for a long time.


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