Lise Howe, Assoc. Broker in DC, MD, VA and attorney in DC (Keller Williams Capital Properties)

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Roy Kelley
Retired - Gaithersburg, MD

I hope you will blog about the acceptable levels in our area.

Apr 28, 2016 10:29 PM
Michael Jacobs
Pasadena, CA
Pasadena And Southern California 818.516.4393

I have not been involved in a radon remediation.  Yet.  

Blog on.  

Apr 29, 2016 02:53 AM
Sam Shueh
(408) 425-1601 - San Jose, CA
mba, cdpe, reopro, pe

opening windows, added an exhaust fan.

Do you know certain granite emits more? The pretty colorful reddish type.

Apr 29, 2016 12:36 AM
Shawn and Angela Miller
Berkshire Hathaway HomeServices Amabassador Real Estate - Lincoln, NE
Lincoln and Omaha, NE REALTORS®

As a former licensed radon measurement specialist, the highest I've tested was in the upper 20's.  At our previous home, we had a level of 18.  They came out and installed the 4 inch suction pipe and it dropped to 12.  They came back and had to "T" off the 4 inch pipe and run another two inch pipe to another section of the basement floor.  The level dropped to around 2.  This was due to the layout and footing of the basement floor.  It's pretty common in eastern Nebraska to have higher levels.  Only way to find out is to have it tested.  Mitigation runs $700 to $1200 on average around here.  When they mitigate, they have to get it below 4 no matter how many times they have to come back.

Apr 29, 2016 12:17 AM
Kat Palmiotti
eXp Commercial, Referral Divison - Kalispell, MT
Helping your Montana dreams take root

My house tested around 16 or 18 (don't remember the exact number). Remediation brought it down to 4ish.

Apr 29, 2016 12:02 AM
Anthony Acosta -
Harry Norman, REALTORS® - Atlanta, GA
Associate Broker


Apr 28, 2016 11:24 PM
Michael Setunsky
Woodbridge, VA
Your Commercial Real Estate Link to Northern VA

Lise Howe I've only had one property that had a radon issue. It did exceed the EPA standard. The seller paid to have a venting system put into place. It was retested and passed. The property settled.

Apr 28, 2016 11:09 PM
Gita Bantwal
RE/MAX Centre Realtors - Warwick, PA
REALTOR,ABR,CRS,SRES,GRI - Bucks County & Philadel

30. In our agreement of sale we specify who pays. In my case I always require that the seller pay for it or the buyer can cancel the contract.

Apr 28, 2016 11:06 PM
Tammy Lankford,
Lane Realty Eatonton, GA Lake Sinclair, Milledgeville, 706-485-9668 - Eatonton, GA
Broker GA Lake Sinclair/Eatonton/Milledgeville

I've had ONE radon test and I have no idea what the number was, but the buyer never mentioned it so I guess it was all clear.  Not common here.

Apr 28, 2016 11:06 PM
Robert Smith
Preview Properties, PC - - Brighton, MI
SRES, Search for Homes Brighton-Howell-SE Michigan

Roy Kelley , the 'acceptable' level as defined by the EPA is no more than 4 picocuries/liter. Anywhere in the USA.  More info at

Personally, I've seen 24!  I've had inspectors tell me they've seen into the 40's.  Almost always, remediation brings it to an acceptable level. My area is known for radon and I have never seen anybody need a second remediation.

An experienced company knows what to do and they do it right the first time.  This is not something to trust to just anybody, by the way.  Make sure you use a specific remediation company.  Interestingly, some builders are now installing the 'guts' of radon mitigation systems when they pour foundations and it includes the vent pipe, too.  If high radon is found later, the inline blower fan is all that's needed. It adds about $800 to the cost of a new build, I'm told.  



Apr 28, 2016 10:56 PM
Dorie Dillard Austin TX
Coldwell Banker Realty ~ 512.750.6899 - Austin, TX
NW Austin ~ Canyon Creek and Spicewood/Balcones

We don't test for radon..what is acceptable in your area?

Apr 28, 2016 10:53 PM
Richard Weeks
Dallas, TX
REALTOR®, Broker

I have never seen a radon report.

Apr 28, 2016 10:45 PM
Bob Crane
Woodland Management Service / Woodland Real Estate, KW Diversified - Stevens Point, WI
Forestland Experts! 715-204-9671

Never had one that was too high.

Jul 24, 2019 10:20 PM
Joan Cox
House to Home, Inc. - Denver Real Estate - 720-231-6373 - Denver, CO
Denver Real Estate - Selling One Home at a Time

Lise, I had a 27 reading a couple years ago, and after mitigating, it came in below 2.    Have never had to do this twice.

May 02, 2016 12:49 AM
Susan Laxson CRS
Palm Properties - La Quinta, CA
Realtor in San Diego, CA & Naples, FL

Never had to have radon remediation.

Apr 29, 2016 09:28 PM
Joe Petrowsky
Mortgage Consultant, Right Trac Financial Group, Inc. NMLS # 2709 - Manchester, CT
Your Mortgage Consultant for Life

Good morning Lise. Just over 4, in some areas that I do mortgages the are constantly high.

Apr 29, 2016 08:22 PM
Mimi Foster
Falcon Property Company - Colorado Springs, CO
Voted Colorado Springs Best Realtor

Four is the acceptable number. I had one at 18. Because the EPA estimates that half the homes in Colorado have readings above four, we see tests done frequently. The ones slightly high (between four and five) often the Seller won't pay. The higher the numbers, the more it leans toward the Seller paying for remediation. If done by a professional, you should never have to have the remediation redone.

Apr 29, 2016 11:03 AM
William Feela
Realtor, Whispering Pines Realty 651-674-5999 No.

.05 in my area

Apr 29, 2016 07:38 AM
Sandy Padula & Norm Padula, JD, GRI
HomeSmart Realty West & Florida Realty Investments - , CA
Presence, Persistence & Perseverance

I have never encountered radon in Florida.

Apr 29, 2016 06:26 AM
Kathleen Daniels, Probate & Trust Specialist
KD Realty - 408.972.1822 - San Jose, CA
Probate Real Estate Services

Have never seen one. We do not test for Radon as a matter of routine. 

Apr 29, 2016 04:55 AM
Lawrence "Larry" & Sheila Agranoff. Cell: 631-805-4400
The Top Team @ Charles Rutenberg Realty 255 Executive Dr, Plainview NY 11803 - Plainview, NY
Long Island Condo and Home Specialists

We don't have this problem here. I would't even know what the numbers everyone is suggesting mean...

Apr 29, 2016 04:49 AM
Gabe Sanders
Real Estate of Florida specializing in Martin County Residential Homes, Condos and Land Sales - Stuart, FL
Stuart Florida Real Estate

I have never seen a radon test performed her in FL.

Apr 29, 2016 03:30 AM
Olga Simoncelli
Veritas Prime, LLC dba Veritas Prime Real Estate - New Fairfield, CT
CONSULTANT, Real Estate Services & Risk Management

I have not seen it in person, but another agent reported 36! Don't know the post remediation results, but sale went through... Personally, I've had buyers back out where the levels were only slightly elevated, but still within "acceptable" norms. They did not even want to discuss remediation.

Apr 29, 2016 03:16 AM
Sybil Campbell
Fernandina Beach, FL
Referral Agent Amelia Island Florida

I have never had to deal with radon gas.

Apr 29, 2016 02:11 AM
Raymond E. Camp
Ontario, NY

It was in the twenties on a REO and then the price dropped substanially and was for my daughter. Well under two with renediation and replacing the farmer's tiles that had been disrupted during building.

Apr 29, 2016 01:18 AM
Barbara Todaro
RE/MAX Executive Realty - Happily Retired - Franklin, MA
Previously Affiliated with The Todaro Team

I think it was about 55...and a the level went under 4 after remediation....

Apr 29, 2016 12:32 AM
Belinda Spillman
Aspen Lane Real Estate Colorful Colorado - Aurora, CO
Colorado Living!

I had one that came in at 19.  The remediation system brought the level down to under 2.

Apr 29, 2016 12:24 AM
Toronto, ON

I don't track such metrics.  In any event, radon tests are not commonly done in my area.  Radon testing appears to be a much bigger issue in your country.

Apr 29, 2016 12:10 AM
Nina Hollander, Broker
Coldwell Banker Realty - Charlotte, NC
Your Greater Charlotte Realtor

I had a home that was almost 7 once, after remediationdropped to below 2.

Apr 28, 2016 11:45 PM
Jeff Dowler, CRS
eXp Realty of California, Inc. - Carlsbad, CA
The Southern California Relocation Dude

It's not an issue in my area of SoCal and I don't recall from my days in New England what any particular test results were. I know some were high, and in a couple cae remediation was done by the seller

Apr 28, 2016 11:34 PM
Tony and Suzanne Marriott, Associate Brokers
Serving the Greater Phoenix and Scottsdale Metropolitan Area - Scottsdale, AZ
Coldwell Banker Realty


Apr 28, 2016 11:30 PM
Becca Rasmussen
HomeSmart Cherry Creek - Highlands Ranch, CO

I don't have any personal experience with it yet, but CO reports on this (, under environment, radon, percent of indoor radon tests above 4).

The highest max percent that they show currently is from within Jefferson County and it was a staggering 1625.7, and that county has a mean of 7.26.

(click image to view larger)


Apr 28, 2016 11:28 PM
Bruce Walter
Keller Williams Realty Lafayette/West Lafayette, Indiana - West Lafayette, IN

Lise, the highest I have seen is around 39 and the mitigation brought it down to around 2.  

I hope someone weighs in from Pennsylvania as I have read that many of the tests come back in the 200-300's!  WOW!

Sellers understand that it is a safety issue and I have never witnessed a seller that did not make the repairs as the buyer could walk as a safety issue in our state PA.

Apr 28, 2016 11:18 PM