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Environmental Consultations

Radon in Single-Family Houses and Townhouses

No conflict of interest:  Potomac Homes is an independent, locally owned and operated business, providing only radon measurement services and with no links to and no interferences from radon remediation contractors.


  • One set of two monitors is required for each 2,000 sq. ft. in the lowest level that could be used regularly, whether it is finished or unfinished.

  • For large homes where the level of the home being tested is over 2,000 sq. ft., an additional set of two monitors is required for each 2,000 sq. ft. of the level of the home being tested.

  • If there is a crawl space under living spaces, another set of two monitors is required in the living space over the crawl space.

  • If there is a garage on slab with living spaces above the garage, another set of two monitors is required in the living space above the garage.


Do you know what you are breathing?

It is highly recommend to measure the indoor concentration level of radon in Montgomery, Howard, Frederick counties, in Northern Virginia and in the District of Columbia

We are using the Protocol for Conducting Radon and Radon Decay Product Measurements in Multifamily Buildings, developed by the AARST Consortium on National Radon Standards, an Approved American National Standard (ANSI).

Please contact us for detailed estimates 


The EPA recommends that you fix your home when the radon level is 4 pCi/L or more and we suggest that you contact a qualified radon reduction contractor about lowering the radon level if results of the above tests are over this threshold.


Another level set by the EPA is 2.0 pCi/L ("Consider Action Level"). At this level, the EPA recommends that you consider installing radon abatement systems in your home to reduce your indoor radon levels.

[more about radon]


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Copyright © 2005 Potomac Homes

Last modified: 03/28/2017

Professional Services: Home Inspections, Residential Inspections, New Houses Inspections, Pre Drywall Inspection, Final Inspections, Historic Houses Inspections, Building Investigations, Infrared Thermal Imaging, Maintenance Inspections, Trouble Shooting Consultations, Environmental Consultations
Infrared Thermal Imaging, Infrared Inspections, Building Thermography, Building Thermogram, Infrared Scans, Building Infrared Scan, Building Science, Building investigations. Thermography, infrared scan of electrical systems, building envelope infrared scan, energy loss infrared thermal imaging
Indoor Air Quality (IAQ):  Mold Inspections, Mold Testing, Mold Sampling, Mold Assessment, Allergens, Lead in Paint, Asbestos
Radon Tests, Electro Magnetic Fields Testing, EMF Testing, Noise Testing
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Montgomery County, Prince George's County, Frederick County, Howard County, Anne Arundel County in Maryland

Montgomery County: Ashton, Aspen Hill, Bethesda, North Bethesda, Beallsville, Barnesville, Boyds, Cabin John, Chevy Chase, Clarksburg, Colesville, Darnestown, Derwood, Dickerson, Friendship Heights, Garrett Park, Gaithersburg, Germantown, Glenn Echo, Kensington, Montgomery Village, Olney, Potomac, North Potomac, Poolesville, Rockville, Silver Spring, Takoma Park, Wheaton

Howard County: Clarksville, Columbia, Dayton, Ellicott City, Elksridge, Glenwood, Scaggsville

Prince George’s County: Beltsville, College Park, Greenbelt, Hyattsville, Landover, Laurel, Capitol Heights, Suitland, Upper Marlboro, Waldorf

Washington DC - District of Columbia

Northern Virginia: Alexandria, Arlington, Fairfax, Falls Church, Loudoun counties. Dulles, Centreville, Chantilly, Herndon, Reston, McLean, Vienna, Rosslyn, Clarendon, Ballston, Annandale, Sterling, Great Falls, Oakton, Ashburn, Leesburg, Tysons Corner, Burke, Manassas