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Washington Radon Information

Washington Radon Program:

Radon Website: Website
Radon Contact: Mike Brennan
Active Radon Program: Yes
Require License for Radon Professionals: No

Washington is the 18th most expansive state in terms of size and the 13th most populous.

Washington does have an active radon program, dedicated to educating citizens about the risks associated with the deadly gas. You can find more information on Radon, testing and mitigation at the official page.

The radon levels in Washington are above average in most areas of the state. That being said, there is an increased risk for all homeowners, which is why we recommend testing exposure levels at least twice a year.

Washington Radon Mitigation and Testing

Need your home tested for radon? Already know you have high levels and need a radon reduction system installed? Finding qualified Radon professionals can be difficult, but we've put together a list of Washington contractors to help you save time.

Washington Radon Mitigation

We have compiled a list of qualified radon mitigation contractors.
Find Radon Mitigation Contractors here

Washington Radon Testing

Need your home or office tested for Radon? We have compiled a list of qualified radon testing contractors.
Find Radon Testing Contractors here

Washington Radon Levels

Map of Washington Radon Levels

Zone 1 (1): Potential for radon levels above 4 pCi/L according to EPA
Zone 2 (2): Potential for radon levels between 2 pCi/L and 4 pCi/L according to the EPA
Zone 3 (3): Lowest EPA level with expected radon levels at or below 2 pCi/L
Disclaimer: It is strongly recommended that all households, schools and office spaces test radon levels individually. The EPA Radon Zone data is not an indicator of individual test results, but a guideline for strategic planning. Toxic radon levels can be found in all counties, regardless of their zone rating. While we make efforts to keep this information up to date, it is derived from third­party sources which may not be accurate or reflect the most current statistics.

Washington Radon Statistics

Washington has 39 counties and 7 (18%) have been assigned Zone 1 counties by the EPA. Zone 1 counties have the highest potential to have homes test higher than 4 pCi/L. Washington's state radon zone average is 2.28, which is the average of all county zone ratings the EPA has assigned the state, ranking it 35 among all states.

Washington Radon Contractor License Information

Does Washington require contractors to be licensed? No.

What are the licensing requirements? There are no state mandated requirements to become a licensed radon contractor in Washington. Those looking for a radon certification can take qualified third party courses that are offered through the NRPP or AARST.

Washington Radon Real Estate Requirements

Does the state of Washington require radon testing for all real estate transactions? No

However both the state of Washington and the EPA recommend that a home or residence should be tested before a real estate transaction is carried out. Even though Washington does not require radon testing, we certainly recommend you have a test performed before you purchase a home. If you decide to perform a test after and find elevated levels, there is no reason to panic. Washington radon mitigation is not expensive compared to the dangers and a system can be implemented in a relatively short period of time.

Browse The National Radon Directory by City

Aberdeen
Acme
Addy
Airway Heights
Allyn
Almira
Amanda Park
Amboy
Anacortes
Anatone
Anderson Island
Appleton
Ariel
Arlington
Ashford
Asotin
Auburn
Bainbridge Island
Battle Ground
Beaver
Belfair
Bellevue
Bellingham
Belmont
Benge
Benton City
Beverly
Bickleton
Bingen
Black Diamond
Blaine
Blakely Island
Bonney Lake
Bothell
Bow
Boyds
Bremerton
Brewster
Bridgeport
Brinnon
Brush Prairie
Buckley
Burbank
Burlington
Camano Island
Camas
Carbonado
Carlton
Carnation
Carrolls
Carson
Cashmere
Castle Rock
Cathlamet
Centerville
Centralia
Chattaroy
Chehalis
Chelan
Cheney
Chewelah
Chimacum
Cinebar
Clallam Bay
Clarkston
Clayton
Cle Elum
Clinton
Colbert
Colfax
College Place
Colton
Colville
Concrete
Connell
Copalis Beach
Copalis Crossing
Cosmopolis
Cougar
Coulee City
Coulee Dam
Coupeville
Cowiche
Creston
Curlew
Curtis
Cusick
Custer
Danville
Darrington
Davenport
Dayton
Deer Park
Deming
Dixie
Dupont
Duvall
East Wenatchee
Eastsound
Eatonville
Edmonds
Edwall
Elbe
Electric City
Elk
Ellensburg
Elma
Eltopia
Endicott
Entiat
Enumclaw
Ephrata
Ethel
Evans
Everett
Everson
Fairchild Air Force Base
Fairfield
Fall City
Farmington
Federal Way
Ferndale
Ford
Forks
Fox Island
Freeland
Friday Harbor
Fruitland
Garfield
Gifford
Gig Harbor
Glenoma
Glenwood
Gold Bar
Goldendale
Graham
Grand Coulee
Grandview
Granger
Granite Falls
Grapeview
Grayland
Grays River
Greenacres
Greenbank
Hansville
Harrah
Harrington
Hartline
Hay
Hoodsport
Hoquiam
Humptulips
Hunters
Ilwaco
Inchelium
Indianola
Ione
Issaquah
Kalama
Keller
Kelso
Kenmore
Kennewick
Kent
Kettle Falls
Kingston
Kirkland
Klickitat
La Center
La Conner
Lacey
Lacrosse
Lake Stevens
Lakebay
Lakewood
Lamona
Lamont
Langley
Latah
Leavenworth
Liberty Lake
Lilliwaup
Lincoln
Lind
Long Beach
Longbranch
Longview
Loomis
Loon Lake
Lopez Island
Lummi Island
Lyle
Lynden
Lynnwood
Mabton
Malaga
Malo
Mansfield
Manson
Maple Falls
Maple Valley
Marblemount
Marlin
Marysville
Matlock
Mattawa
Mazama
Mccleary
Mead
Medical Lake
Medina
Mercer Island
Mesa
Metaline Falls
Methow
Mica
Milton
Mineral
Mohler
Monroe
Montesano
Morton
Moses Lake
Mossyrock
Mount Vernon
Mountlake Terrace
Moxee
Mukilteo
Naches
Naselle
Newman Lake
Newport
Nine Mile Falls
Nordland
North Bend
Northport
Oak Harbor
Oakesdale
Oakville
Ocean Park
Ocean Shores
Odessa
Okanogan
Olalla
Olga
Olympia
Omak
Onalaska
Orient
Orondo
Oroville
Orting
Othello
Otis Orchards
Outlook
Pacific
Packwood
Palisades
Palouse
Pasco
Pateros
Pe Ell
Peshastin
Point Roberts
Pomeroy
Port Angeles
Port Hadlock
Port Ludlow
Port Orchard
Port Townsend
Poulsbo
Prescott
Prosser
Pullman
Puyallup
Quilcene
Quinault
Quincy
Rainier
Randle
Ravensdale
Raymond
Reardan
Redmond
Redondo
Renton
Republic
Rice
Richland
Ridgefield
Ritzville
Riverside
Rochester
Rock Island
Rockford
Rockport
Roosevelt
Rosalia
Rosburg
Roy
Royal City
Ryderwood
Saint John
Salkum
Sammamish
Seabeck
Seattle
Sedro Woolley
Sekiu
Selah
Sequim
Shelton
Silver Creek
Silverdale
Silverlake
Skamokawa
Snohomish
Snoqualmie
Soap Lake
South Bend
Spanaway
Spangle
Spokane
Sprague
Springdale
Stanwood
Steilacoom
Stevenson
Sultan
Sumas
Sumner
Sunnyside
Suquamish
Tacoma
Tahuya
Tekoa
Tenino
Thornton
Thorp
Tieton
Tokeland
Toledo
Tonasket
Toppenish
Touchet
Toutle
Trout Lake
Tumtum
Twisp
Underwood
Union
Uniontown
University Place
Usk
Vader
Valley
Valleyford
Vancouver
Vashon
Vaughn
Veradale
Wahkiacus
Waitsburg
Walla Walla
Wapato
Warden
Washougal
Washtucna
Waterville
Wauconda
Wellpinit
Wenatchee
West Richland
Westport
White Salmon
White Swan
Wilbur
Winlock
Winthrop
Woodinville
Woodland
Yacolt
Yakima
Yelm
Zillah