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Breadcrumb

  1. Home
  2. Radon

EPA Map of Radon Zones and Supplemental Information

On this page:

  • Information About EPA Map of Radon Zones
  • Data and Information About Regional, State and Tribal Radon Programs
  • Supplemental Information

For more information on EPA Map of Radon Zones, please view the following materials:

  • Printable Map of EPA Radon Zones
  • EPA Maps of Radon Zones and Supporting Documents by State
  • View a Radon Zones-Spreadsheet (xls)

Information About EPA Map of Radon Zones

The Map of Radon Zones was developed in 1993 to identify areas of the U.S. with the greatest potential for elevated indoor radon levels based on indoor radon measurement data, geology, aerial radioactivity, soil parameters, and foundation types.

This map should not be used to determine if individual homes need to be tested. No matter where you live, test your home for radon—it’s easy and inexpensive. Fix your home if your radon level is 4 picocuries per liter (pCi/L) (150 becquerels per cubic meter (Bq/m3))or higher. Consider fixing if your level is between 2 and 4 pCi/L (75 - 150 becquerels per cubic meter (Bq/m3)). The radon action level should comply with the guidance of the country, state, or other local jurisdiction of authority where the test is being conducted.

EPA's Map of Radon Zones can be supplemented with available state-developed or other data to further understand the radon potential for a specific area. Additional radon testing data may be accessed through the CDC Environmental Health Tracking Network, an online source for local, timely data from Tracking Program-funded states and six national radon testing laboratories.


Data and Information About Regional, State and Tribal Radon Programs

Click on a region for information on radon specific to your EPA Regional Office, State or Tribal program. Then click on your state to find your state radon contact and information:

  • Region 1: Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont
  • Region 2: New Jersey, New York, Puerto Rico, US Virgin Islands
  • Region 3: Delaware, District of Columbia, Maryland, Pennsylvania, Virginia, West Virginia
  • Region 4: Alabama, Florida, Georgia, Kentucky, Mississippi, North Carolina, South Carolina, Tennessee
  • Region 5: Illinois, Indiana, Michigan, Minnesota, Ohio, Wisconsin
  • Region 6: Arkansas, Louisiana, New Mexico, Oklahoma, Texas
  • Region 7: Iowa, Kansas, Missouri, Nebraska
  • Region 8: Colorado, Montana, North Dakota, South Dakota, Utah, Wyoming
  • Region 9: Arizona, California, Guam, Hawaii, Nevada
  • Region 10 Alaska, Idaho, Oregon, Washington

Region 1 Office, State and Tribal Programs

Click on your state to find your state radon contact information and resources:

Connecticut | Maine | Massachusetts | New Hampshire | Rhode Island | Vermont

Connecticut

Resource Title State Information
IAQ State Program CT State Department of Public Health
Program Website CT State Radon Website
Phone 860-509-7300
Fax Number  
State Resources
  • Alessia Frasco (alessia.frasco@ct.gov)
  • CT.gov/radon
  • 410 Capitol Avenue
    • MS#12RAD
    • P.O. Box 340308
      Hartford, Connecticut 06134-0308
    • Office Hours: 8:30AM- 4:30PM (M-F)
Radon Data
  • CT Zone Map from EPA(PDF)
  • Indoor Radon Potential Map of CT (PDF)
Regional Resources
  • Region 1 Indoor Air Quality
  • IED's Tribal Resources
  • Dan Burke (Burke.Dan@epa.gov); 617-918-1285
  • Madeline Isenberg (Isenberg.Madeline@epa.gov); 617-918-1271
  • Patrick Bird (Bird.Patrick@epa.gov); 617-918-1287

Maine

Resource Title State Information
IAQ State Program ME Division of Environmental Health, Radiation Control Program
Program Website ME State Radon Website
Phone 207-287-5676
Fax Number 800-232-0842 (in Maine only)
State Resources
  • Jay Hyland (Jay.Hyland@maine.gov)
  • maine.gov
  • ME Dept. of Health and Human Services
  • ME Center for Disease Control and Prevention (Formerly the Bureau of Health) TTY: 800-606-0215
Radon Data
  • ME Zone Map from EPA
Regional Resources
  • Region 1 Indoor Air Quality
  • IED's Tribal Resources
  • Dan Burke (Burke.Dan@epa.gov); 617-918-1285
  • Madeline Isenberg (Isenberg.Madeline@epa.gov); 617-918-1271
  • Patrick Bird (Bird.Patrick@epa.gov); 617-918-1287

Massachusetts

Resource Title State Information
IAQ State Program MA Dept. of Public Health, Radiation Control Program
Program Website MA State Radon Website
Phone

413-586-7525

Fax Number 800-723-6695 (in Massachusetts only)
State Resources
  • Jennifer Lajoie(Jennifer.Lajoie@state.ma.us)
  • mass.gov
  • MA Department of Public Health
    • Phone: 617-624-6000
      TTY: 617-624-6001
Radon Data
  • MA Zone Map from EPA
  • MA Public Health Data Explorer
Regional Resources
  • Region 1 Indoor Air Quality
  • IED's Tribal Resources
  • Dan Burke (Burke.Dan@epa.gov); 617-918-1285
  • Madeline Isenberg (Isenberg.Madeline@epa.gov); 617-918-1271
  • Patrick Bird (Bird.Patrick@epa.gov); 617-918-1287

New Hampshire

Resource Title State Information
IAQ State Program NH Department of Health and Human Services
Program Website NH State Radon Website
Phone

603-271-1708

Fax Number  
State Resources
  • Mary Butow (mary.e.butow@dhhs.nh.gov)
  • nh.gov
Radon Data
  • NH Zone Map from EPA
  • NH Public Health Data Explorer
Regional Resources
  • Region 1 Indoor Air Quality
  • IED's Tribal Resources
  • Dan Burke (Burke.Dan@epa.gov); 617-918-1285
  • Madeline Isenberg (Isenberg.Madeline@epa.gov); 617-918-1271
  • Patrick Bird (Bird.Patrick@epa.gov); 617-918-1287

Rhode Island

Resource Title State Information
IAQ State Program RI Department of Health, Division of Community, Family Health & Equity, Healthy Homes and Environment Team
Program Website RI State Radon Website
Phone

401-222-7756

Fax Number 401-222-7784
State Resources
  • Bonnie Cassani Brandt (Bonnie.CassaniBrandt@health.ri.gov)
  • RI Dept. of Health
    Phone: 401-222-2231
    Fax: 401-222-654
    TTY: 711-RIRelay
Radon Data
  • RI Zone Map from EPA
  • RI's Map - Radon Data
Regional Resources
  • Region 1 Indoor Air Quality
  • IED's Tribal Resources
  • Dan Burke (Burke.Dan@epa.gov); 617-918-1285
  • Madeline Isenberg (Isenberg.Madeline@epa.gov); 617-918-1271
  • Patrick Bird (Bird.Patrick@epa.gov); 617-918-1287

Vermont

Resource Title State Information
IAQ State Program VT Radon Program
Program Website VT State Radon Website
Phone

802-863-7220

Fax Number  
State Resources
  • Michelle Thompson (michelle.e.thompson@vermont.gov)
  • vermont.gov
  • VT Department of Health
    Phone: 802-863-7200
    In VT: 800-464-4343
    Fax: 802-865-7754 / 800-439-8550 (in VT only)
    TTY/TDD: Dial 711 first
Radon Data
  • VT Zone Map from EPA
  • VT Radon Risk Maps
Regional Resources
  • Region 1 Indoor Air Quality
  • IED's Tribal Resources
  • Dan Burke (Burke.Dan@epa.gov); 617-918-1285
  • Madeline Isenberg (Isenberg.Madeline@epa.gov); 617-918-1271
  • Patrick Bird (Bird.Patrick@epa.gov); 617-918-1287

Region 2 Office, State and Tribal Programs

Click on your state to find your state radon contact information and resources:

New Jersey | New York | Puerto Rico | US Virgin Islands

New Jersey

Resource Title State Information
IAQ State Program NJ Dept. of Environmental Protection, Radiation Protection & Release Protection Program
Program Website NJ State Radon Website
Phone

609-984-5425

Fax Number  
State Resources
  • Anita Kopera (Anita.Kopera@dep.state.nj.us)
  • nj.gov
  • NJ Dept. of Environmental Protection, Radon Section
  • NJ Dept. of Environmental Protection
    Toll Free: 877-927-6337 (For New Jersey, New York, Pennsylvania and Delaware calling areas)
Radon Data
  • NJ Zone Map from EPA
  • NJ Radon Zones State Tier Map
  • RRNC Information
Regional Resources
  • Region 2; Indoor Air Quality
  • IED's Tribal Resources
  • Conrad Sherman (Sherman.Conrad@epa.gov)
  • 212-637-3245

New York

Resource Title State Information
IAQ State Program NY State Department of Health, Radiological Health/Radon
Program Website NY State Radon Website
Phone

518-402-7556

Fax Number  
State Resources
  • Primary: Cynthia Costello
  • Alternate: Christine Dobert
  • NY Department of Health
  • radon@health.ny.gov
  • 800-458-1158
Radon Data
  • NY Zone Map from EPA
  • NYS Tracking (EPHT): Radon Test Data, Maps and Statistics by County
  • NY Open Data: Radon Tests by County
Regional Resources
  • Region 2; Indoor Air Quality
  • IED's Tribal Resources
  • Conrad Sherman (Sherman.Conrad@epa.gov)
  • 212-637-3245

Puerto Rico

Resource Title State Information
IAQ State Program PR Dept. of Health, Radiological Health Division
Program Website  
Phone

787-765-2929 ext. 3210

Fax Number 787-274-6829
State Resources
  • Raul Hernandez Doble, Director (rhernandez2@salud.pr.gov)
Radon Data
  • USGS Report (PDF)
Regional Resources
  • Region 2; Indoor Air Quality
  • IED's Tribal Resources
  • Conrad Sherman (Sherman.Conrad@epa.gov)
  • 212-637-3245

Virgin Islands

Resource Title State Information
IAQ State Program Virgin Islands uses EPA Region 2 Radon Office
Program Website  
Phone

EPA: 212-637-4013

VI Health: 340-718-1311, Ext. 3708

Fax Number  
State Resources None
Radon Data None Available
Regional Resources
  • Region 2; Indoor Air Quality
  • IED's Tribal Resources
  • Conrad Sherman (Sherman.Conrad@epa.gov)
  • 212-637-3245

Region 3 Office, State and Tribal Programs

Click on your state to find your state radon contact information and resources:

Delaware | District of Columbia | Maryland | Pennsylvania | Virginia| West Virginia

Delaware

Resource Title State Information
IAQ State Program DEHSS Division of Public Health, Office of Healthy Environments, Radon Program
Program Website DE State Radon Website
Phone

302-744-4727

Fax Number 303-739-3839
State Resources
  • Amanda Lacklen (amanda.lacklen@delaware.gov)
  • delaware.gov
  • Delaware Division of Public Health
    302-744-4700
    888-459-2943
    Fax: 302-739-3839
  • dhssinfo@state.de.us
Radon Data
  • DE Zone Map from EPA
Regional Resources
  • Region 3; Indoor Air Quality
  • IED's Tribal Resources
  • Michelle Moyer (moyer.michelle@epa.gov)
    • 215-814-2098

District of Columbia

Resource Title State Information
IAQ State Program DC Department of Energy and the Environment
Program Website DC State Radon Website
Phone

202-535-2600

Fax Number 202-481-3770
State Resources
  • Keith Keemer (keith.keemer@dc.gov)
    202-535-2600
  • Free Radon Test Kit: Request Form
    202-535-2302
  • District of Columbia, Department of Energy and Environment
    202-535-2600
  • Department of Energy and Environment
    202 535-2600
Radon Data
  • DC Radon Zone Map
Regional Resources
  • Region 3; Indoor Air Quality
  • IED's Tribal Resources
  • Michelle Moyer (moyer.michelle@epa.gov)
    • 215-814-2098

Maryland

Resource Title State Information
IAQ State Program

The MDE and MDH applied for the SIRG. The MDE and MDH will be responsible for the day to day activities of the grant.

If you have questions about radon in MD, contact the number below. If you are a Montgomery County resident, please use the Montgomery County Resources below.

Program Website Maryland Department of Health Help Line (1-866-703-3266)
Maryland Department of the Environment
Phone: 410-537-3193
Montgomery County Residents:
Department of Environmental Protection
Phone: 240-777-0311
DEP Email(askDEP@montgomerycountymd.gov)
Montgomery County: Radon
Phone

Toll Free (inside MD): 866-703-3266
TTY: 800-735-2258

Fax Number 410-537-3198
State Resources
  • Abdurahman Ablimit ( abdurahman.ablimit1@maryland.com)
    Phone: 410-537-3193
  • Maryland Department of the Environment
    Phone: 410-537-3193
  • Maryland Department of Health
    Phone: 410-767-6712
  • maryland.gov
  • The Division of Environmental Policy and Compliance
    DEP Email
Radon Data
  • MD Zone Map from EPA
Regional Resources
  • Region 3; Indoor Air Quality
  • IED's Tribal Resources
  • Michelle Moyer (moyer.michelle@epa.gov)
    • 215-814-2098

Pennsylvania

Resource Title State Information
IAQ State Program

PA Dept. of Environmental Protection, Bureau of Radiation Protection

Program Website PA State Radon Website
Phone

717-783-3594

Fax Number 717-783-8965
State Resources
  • Bob Lewis(rolewis@pa.gov)
  • PA Department of Environmental Protection
  • pa.gov
  • 800-237-2366 (Pennsylvania only)
Radon Data
  • PA Zone Map from EPA
Regional Resources
  • Region 3; Indoor Air Quality
  • IED's Tribal Resources
  • Michelle Moyer (moyer.michelle@epa.gov)
    • 215-814-2098

Virginia

Resource Title State Information
IAQ State Program Virginia Department of Health, Office of Radiological Health
Program Website VA State Radon Website
Phone

804-864-8161

Fax Number 804-864-8175
State Resources
  • Radon@vdh.virginia.gov
    Phone: 804-864-8161
    Fax: 804-864-8165
  • Fairfax County Radon Page
  • Virginia Department of Health (VDH)
  • VDH List of Health Topics
  • Office of Radiological Health Toll Free Hotline:
    • 800-468-0138
Radon Data
  • VA Zone Map from EPA
Regional Resources
  • Region 3; Indoor Air Quality
  • IED's Tribal Resources
  • Michelle Moyer (moyer.michelle@epa.gov)
    • 215-814-2098

West Virginia

Resource Title State Information
IAQ State Program

WV Radiation, Toxics & Indoor Air Division

Program Website WV State Radon Website
Phone

304-352-5039

Fax Number 304-558-0524
State Resources
  • Paul Ice (Paul.D.Ice@wv.gov)
    304-352-5013
  • WV Office of Environmental Health Services
  • Healthy People 2010 Initiative
  • Local Health Departments by County/Area in West Virginia
  • radon@wv.gov
  • Cancer Control Plan (PDF)
  • 800-922-1255 (Toll free in-state)
Radon Data
  • WV Zone Map from EPA
Regional Resources
  • Region 3; Indoor Air Quality
  • IED's Tribal Resources
  • Michelle Moyer (moyer.michelle@epa.gov)
    • 215-814-2098

Region 4 Office, State and Tribal Programs

Click on your state to find your state radon contact information and resources:

Alabama | Florida | Georgia | Kentucky | Mississippi | North Carolina | South Carolina | Tennessee

Alabama

Resource Title State Information
IAQ State Program

Alabama Department of Public Health Radiation Control

Program Website AL State Radon Website
Phone

334-290-6244

Fax Number 334-285-9342
State Resources
  • Nick Swindall (john.swindall@adph.state.al.us)
  • alabama.gov
  • Ordering Radon Test Kits
  • Alabama Department of Public Health: 800-582-1866
Radon Data
  • AL Zone Map from EPA
  • Test Results by County
Regional Resources
  • Region 4; Indoor Air Quality
  • IED's Tribal Resources
  • Mary Reynolds (Reynolds.Mary@epa.gov)
    • 404-562-8991

Florida

Resource Title State Information
IAQ State Program

FL Department of Health, Division of Disease Control and Health Protection, Bureau of Environmental Health, Radon Program

Program Website FL State Radon Website
Phone

850-245-4288

Fax Number 850-487-0864
State Resources
  • Michelle Dale (Michelle.Dale@flhealth.gov)
  • The Official Portal of the State of Florida
  • Florida Dept. of Health
    850-245-4444
    Fax: 850-922-9453
    phtoxicology@flhealth.gov
  • 800-543-8279
Radon Data
  • FL Zone Map from EPA
Regional Resources
  • Region 4; Indoor Air Quality
  • IED's Tribal Resources
  • Mary Reynolds (Reynolds.Mary@epa.gov)
    • 404-562-8991

Georgia

Resource Title State Information
IAQ State Program

University of Georgia

Program Website GA State Radon Website
Phone

706-583-0602

Fax Number  
State Resources
  • Pamela R. Turner (prturner@uga.edu)
  • University of Georgia Extension Radon Education Program
  • ugaradon@uga.edu
  • UGA Extension 1-800-ASK-UGA1 (1-800-275-8421)
Radon Data
  • GA Zone Map from EPA
Regional Resources
  • Region 4; Indoor Air Quality
  • IED's Tribal Resources
  • Mary Reynolds (Reynolds.Mary@epa.gov)
    • 404-562-8991

Kentucky

Resource Title State Information
IAQ State Program
Program Website  
Phone
Fax Number  
State Resources
  • kentucky.gov
  • Kentucky Board of Radon Safety
Radon Data
  • KY Zone Map from EPA
Regional Resources
  • Region 4; Indoor Air Quality
  • IED's Tribal Resources
  • Mary Reynolds (Reynolds.Mary@epa.gov)
    • 404-562-8991

Mississippi

Resource Title State Information
IAQ State Program
Program Website MS State Radon Website
Phone
Fax Number  
State Resources
  • Mississippi State Department of Health
  • www.ms.gov/
Radon Data
  • MS Zone Map from EPA
Regional Resources
  • Region 4; Indoor Air Quality
  • IED's Tribal Resources
  • Mary Reynolds (Reynolds.Mary@epa.gov)
    • 404-562-8991

North Carolina

Resource Title State Information
IAQ State Program

NC NC Department of Health and Human Services, Radon Program

Program Website NC State Radon Website
Phone

828-712-0972

Fax Number  
State Resources
  • Phillip Gibson (Phillip.Gibson@dhhs.nc.gov) and
    Catherine Rosfjord (Catherine.Rosfjord@dhhs.nc.gov)
  • ncgov.com
Radon Data
  • NC Zone Map from EPA
Regional Resources
  • Region 4; Indoor Air Quality
  • IED's Tribal Resources
  • Mary Reynolds (Reynolds.Mary@epa.gov)
    • 404-562-8991

South Carolina

Resource Title State Information
IAQ State Program

SC Department of Environmental Services

Program Website SC State Radon Website
Phone

800-768-0362

Fax Number 803-898-4117
State Resources
  • radon@des.sc.gov
Radon Data
  • SC Zone Map from EPA
Regional Resources
  • Region 4; Indoor Air Quality
  • IED's Tribal Resources
  • Mary Reynolds (Reynolds.Mary@epa.gov)
    • 404-562-8991

Tennessee

Resource Title State Information
IAQ State Program

TN Radon Program

Program Website TN State Radon Website
Phone

615-532-0738

Fax Number 615-532-0199
State Resources
  • Lexi Brown (Lexi.Brown@tn.gov)
  • Tennessee Dept. of Environment and Conservation
    Phone: 615-532-0738
  • tn.gov
  • 800-232-1139
    888-891-8332
Radon Data
  • TN Zone Map from EPA
Regional Resources
  • Region 4; Indoor Air Quality
  • IED's Tribal Resources
  • Mary Reynolds (Reynolds.Mary@epa.gov)
    • 404-562-8991

Region 5 Office, State and Tribal Programs

Click on your state to find your state radon contact information and resources:

Illinois | Indiana |Michigan | Minnesota | Ohio |  Wisconsin

Illinois

Resource Title State Information
IAQ State Program

IL Emergency Management Agency Radon Program

Program Website IL State Radon Website
Phone
Fax Number  
State Resources
  • Patrick Daniels (patrick.daniels@illinois.gov)
  • Illinois Emergency Management Agency
  • 800-782-7860 / 217-782-7860 (24 hrs/day)
  • Illinois Department of Public Health
    Phone: 217-782-4977
    Fax: 217-782-3987
    TTY: 800-547-0466
  • illinois.gov
  • 800-325-1245 (IL residents only)
Radon Data
  • IL Zone Map from EPA
  • IEMA Public Radon Dashboard
Regional Resources
  • Region 5; Indoor Air Quality
  • IED's Tribal Resources
  • Jeanette Marrero (Marrero.Jeanette@epa.gov)
    • 312-886-6543

Indiana

Resource Title State Information
IAQ State Program

IN Radon Program

Program Website IN State Radon Website
Phone
Fax Number  
State Resources
  • Paul Krievins (pkrievins@isdh.in.gov )
    317-233-7197
  • Indiana Department of Environmental Management
    Phone: 317-232-8603
    Tool-free: 1-800-272-9723
    Report Environmental Emergencies, 24 hours-a-day: 888-233-7745 (inside U.S.), 317-233-7745 (outside U.S.)
    IDEM Fax: 317-233-6647
  • in.gov
  • 800-272-9723
Radon Data
  • IN Zone Map from EPA
Regional Resources
  • Region 5; Indoor Air Quality
  • IED's Tribal Resources
  • Jeanette Marrero (Marrero.Jeanette@epa.gov)
    • 312-886-6543

Michigan

Resource Title State Information
IAQ State Program

MI Dept. of Environmental Quality, Office of Waste Management and Radiological Protection

Program Website MI State Radon Website
Phone
Fax Number  
State Resources
  • Leslie E. Smith, III (radon@michigan.gov)
  • Michigan Dept. of Environment, Great Lakes, and Energy
  • Michigan Dept. of Human Services
  • Toll Free
    • 800-723-6642 (in state only)
    • MI Toxic Hotline: 1-800-MI-TOXIC (1-800-648-6942)
  • michigan.gov
Radon Data
  • MI Zone Map from EPA
  • MI Interactive Radon Map
Regional Resources
  • Region 5; Indoor Air Quality
  • IED's Tribal Resources
  • Jeanette Marrero (Marrero.Jeanette@epa.gov)
    • 312-886-6543

Minnesota

Resource Title State Information
IAQ State Program

MN Dept. of Health, Indoor Air Program, Radon in MN Homes

Program Website MN State Radon Website
Phone
Fax Number  
State Resources
  • Email the Indoor Air Unit (health.indoorair@state.mn.us)
  • Minnesota Dept. of Health, Air Quality Program
  • Minnesota Department of Health
    Phone: 651-201-5000
    Request Environmental Health General Information
  • state.mn.us
  • 800-798-9050
Radon Data

Minnesota Dept. of Health Recommends:
1. Every Minnesota home, even those built radon-resistant, be tested for radon.
2. You should retest your home every 2 - 5 years and save your results.
3. Be sure to test before and after you make any major structural renovations such as building an addition or finishing a basement. Radon-resistant techniques can be inexpensively included as part of the renovation, if needed.
4. You should also perform a radon test after buying a new heating system or adding central air conditioning.

  • MN Zone Map from EPA
  • MN Radon Interactive Map
Regional Resources
  • Region 5; Indoor Air Quality
  • IED's Tribal Resources
  • Jeanette Marrero (Marrero.Jeanette@epa.gov)
    • 312-886-6543

Ohio

Resource Title State Information
IAQ State Program

OH Department of Health, Radon Education and Licensing Program

Program Website OH State Radon Website
Phone
Fax Number  
State Resources
  • indoor.radon@odh.ohio.gov (indoor.radon@odh.ohio.gov)
  • Ohio Department of Health
    Phone: 614-644-3020
  • Ohio Department of Health (ODH)
  • ohio.gov
  • 800-523-4439 (Ohio residents only)
Radon Data
  • OH Zone Map from EPA
Regional Resources
  • Region 5; Indoor Air Quality
  • IED's Tribal Resources
  • Jeanette Marrero (Marrero.Jeanette@epa.gov)
    • 312-886-6543

Wisconsin

Resource Title State Information
IAQ State Program

WI Radon Program

Program Website WI State Radon Website
Phone

608-267-7199

Fax Number  
State Resources
  • Amanda Bagin (Amanda.Bagin@dhs.wisconsin.gov)
    Phone: 608-267-2949
  • WI Radon Information Centers
  • wisconsin.gov
  • 888-569-7236
Radon Data
  • WI Zone Map from EPA
  • Interactive Radon Map
  • WI County Environmental Health Profiles

Regional Resources
  • Region 5; Indoor Air Quality
  • IED's Tribal Resources
  • Jeanette Marrero (Marrero.Jeanette@epa.gov)
    • 312-886-6543

Region 6 Office, State and Tribal Programs

Click on your state to find your state radon contact information and resources:

Arkansas | Louisiana | New Mexico | Oklahoma | Texas

Arkansas

Resource Title State Information
IAQ State Program

AR Department of Health Radiation Control Section

Program Website AR State Radon Website
Phone

501-661-2621

Fax Number 501-280-4090
State Resources
  • Rebecca Davis (adh.epi.radon@arkansas.gov)
  • 800-633-1735
Radon Data
  • AR Zone Map from EPA
Regional Resources
  • Region 6; Indoor Air Quality
  • IED's Tribal Resources
  • George Brozowski (brozowski.george@epa.gov)
    • 214-665-8541

Louisiana

Resource Title State Information
IAQ State Program

LA Department of Environmental Quality
602 N. Fifth Street Baton Rouge, LA 70802
OR
Department of Health
628 N. Fourth Street
Baton Rouge, LA 70802

Program Website LA State Radon Website
Phone

1-866-896-LDEQ

Fax Number 225-219-3154
State Resources
  • Russell S. Clark (Russell.Clark@la.gov)
    225-219-3677
    Melanie Ramson (Melanie.Ramson@la.gov)
    225-342-8303
  • Louisiana Department of Health
  • Phone: 225-342-9500
    Fax: 225-342-5568
    LA DHH Email
  • louisiana.gov
  • 866-896-5337
Radon Data
  • LA Zone Map from EPA
  • Radon Levels for LA
Regional Resources
  • Region 6; Indoor Air Quality
  • IED's Tribal Resources
  • George Brozowski (brozowski.george@epa.gov)
    • 214-665-8541

New Mexico

Resource Title State Information
IAQ State Program

New Mexico Environment Department, Radiation Control Bureau
525 Camino de los Marquez, Suite 1, Santa Fe, New Mexico 87505

Program Website NM State Radon Website
Phone

505-476-8608

Fax Number 505-476-8654
State Resources
  • NM Environment Department
  • newmexico.gov
  • New Mexico residents can request free Radon Test Kits while supplies last. A limited number of free radon test kits are also occasionally available through this program and can be obtained by contacting the Program Coordinator.
  • 800-324-5928
Radon Data
  • NM Zone Map from EPA
Regional Resources
  • Region 6; Indoor Air Quality
  • IED's Tribal Resources
  • George Brozowski (brozowski.george@epa.gov)
    • 214-665-8541

Oklahoma

Resource Title State Information
IAQ State Program

OK Department of Environmental Quality, Land Protection Division, Radiation Management Section

Program Website OK State Radon Website
Phone

405-702-5100

Fax Number 405-702-5101
State Resources
  • Keisha Cornelius (keisha.cornelius@deq.ok.gov)
    Phone: 405-702-5162
  • Oklahoma Department of Environmental Quality
  • The Oklahoma State Department of Health
    Phone: 405-271-5600
  • ok.gov
Radon Data
  • OK Zone Map from EPA
Regional Resources
  • Region 6; Indoor Air Quality
  • IED's Tribal Resources
  • George Brozowski (brozowski.george@epa.gov)
    • 214-665-8541

Texas

Resource Title State Information
IAQ State Program

TX Department of State Health Services, Radon Program

Program Website TX State Radon Website
Phone

806-834-6202

Fax Number 512-834-6726
State Resources
  • radontesting@ttu.edu (radontesting@ttu.edu)
  • Texas Department of State Health Services
    Phone: 512-776-7111
    Toll Free: 888-963-7111/TDD: 800-735-2989
  • texas.gov
Radon Data
  • TX Zone Map from EPA
Regional Resources
  • Region 6; Indoor Air Quality
  • IED's Tribal Resources
  • George Brozowski (brozowski.george@epa.gov)
    • 214-665-8541

Region 7 Office, State and Tribal Programs

Click on your state to find your state radon contact information and resources:

Iowa | Kansas | Missouri | Nebraska

Iowa

Resource Title State Information
IAQ State Program

IA Department of Public Health Radon Program

Program Website IA State Radon Website
Phone

515-281-4928

Fax Number  
State Resources
  • Randy Lane (randy.lane@idph.iowa.gov)
  • IA Department of Public Health
  • iowa.gov
  • 800-383-5992
Radon Data
  • IA Zone Map from EPA
Regional Resources
  • Region 7; Indoor Air Quality
  • IED's Tribal Resources
  • SIRG regional contact: Molly Schreiner
    • Email: schreiner.molly@epa.gov,
    • Phone: 913-551-7228

Kansas

Resource Title State Information
IAQ State Program

Radiation Control Program, KS Department of Health and Environment

Program Website KS State Radon Website
Phone

785-296-4359

Fax Number  
State Resources
  • Jason Meinholdt the Director of Radiation Control Program (jason.meinholdt@ks.gov)
  • Kansas State University's Kansas Radon Program
  • Phone: 785-532-6026
    Fax: 785-532-6952
  • The Kansas Department of Health and the Environment
    Phone: 785-296-1500
    Fax: 785-368-6368
    KDHEKS Email
  • kansas.gov
  • 800-693-5343
Radon Data
  • KS Zone Map from EPA
  • KS Radon Program - County Map
Regional Resources
  • Region 7; Indoor Air Quality
  • IED's Tribal Resources
  • SIRG regional contact: Molly Schreiner
    • Email: schreiner.molly@epa.gov,
    • Phone: 913-551-7228

Missouri

Resource Title State Information
IAQ State Program

Bureau of Environmental Epidemiology, MO Department of Health and Senior Services

Program Website MO State Radon Website
Phone

573-751-6102

Fax Number 573-526-6946
State Resources
  • Brandi Hamilton (radon@health.mo.gov)
  • Missouri Department of Health and Senior Services
  • mo.gov
  • 866-628-9891
Radon Data
  • MO Zone Map from EPA
Regional Resources
  • Region 7; Indoor Air Quality
  • IED's Tribal Resources
  • SIRG regional contact: Molly Schreiner
    • Email: schreiner.molly@epa.gov,
    • Phone: 913-551-7228

Nebraska

Resource Title State Information
IAQ State Program

NE Dept. of Health and Human Services, Office of Environmental Health Hazards and Indoor Air, Radon Program

Program Website NE State Radon Website
Phone

402-471-0783

Fax Number 402-471-8833
State Resources
  • Adrienne Moody (Adrienne.Moody@nebraska.gov)
  • Nebraska Department of Health and Human Services (HHS)
  • nebraska.gov
  • 800-334-9491
Radon Data
  • NE Zone Map from EPA
Regional Resources
  • Region 7; Indoor Air Quality
  • IED's Tribal Resources
  • SIRG regional contact: Molly Schreiner
    • Email: schreiner.molly@epa.gov,
    • Phone: 913-551-7228

Region 8 Office, State and Tribal Programs

Click on your state to find your state radon contact information and resources:

Colorado | Montana | North Dakota | South Dakota | Utah | Wyoming

Colorado

Resource Title State Information
IAQ State Program

CO Department of Public Health & Environment (CDPHE)

Program Website CO State Radon Website
Phone

800-846-3986 

Fax Number 303-691-7841
State Resources
  • Margaret Horton (margaret.horton@state.co.us)
    Radon Program coordinator
  • CO Dept. of Public Health and Environment
  • colorado.gov
  • 800-846-3986
Radon Data
  • CO Zone Map from EPA
  • Colorado Public Health Data Explorer
Regional Resources
  • Region 8; Indoor Air Quality
  • IED's Tribal Resources
  • Amanda Hong (Hong.Amanda@epa.gov)
    • 303-312-6221

Montana

Resource Title State Information
IAQ State Program

MT Department of Environmental Quality, Energy: Radon

Program Website MT State Radon Website
Phone

406-444-6592

Fax Number  
State Resources
  • Michael Gustafson
  • MT Department of Environmental Quality
  • MT Dept. of Public Health and Human Services
    Phone: 406-444-6592
    Fax: 406-444-0281
  • mt.gov
Radon Data
  • MT Zone Map from EPA
Regional Resources
  • Region 8; Indoor Air Quality
  • IED's Tribal Resources
  • Amanda Hong (Hong.Amanda@epa.gov)
    • 303-312-6221

North Dakota

Resource Title State Information
IAQ State Program

ND Department of Environmental Quality

Program Website ND State Radon Website
Phone

701-328-5166

Fax Number 701-328-5200
State Resources
  • Justin Otto (jotto@nd.gov)
  • North Dakota Department of Health
  • https://deq.nd.gov/
Radon Data
  • ND Zone Map from EPA
Regional Resources
  • Region 8; Indoor Air Quality
  • IED's Tribal Resources
  • Amanda Hong (Hong.Amanda@epa.gov)
    • 303-312-6221

South Dakota

Resource Title State Information
IAQ State Program

SD Dept. of Environment & Natural Resources

Program Website SD State Radon Website
Phone

605-773-6038

Fax Number  
State Resources
  • Duncan Jakubowski (Duncan.jakubowski@state.sd.us)
  • SD Department of Health
    Phone: 605-773-3361
    Toll-free: 800-738-2301 (in state)
    Email: DOH.info@state.sd.us
  • sd.gov
  • 800-438-3367
Radon Data
  • SD Zone Map from EPA
Regional Resources
  • Region 8; Indoor Air Quality
  • IED's Tribal Resources
  • Amanda Hong (Hong.Amanda@epa.gov)
    • 303-312-6221

Utah

Resource Title State Information
IAQ State Program

UT Dept. of Environmental Quality, Radiation Control Division

Program Website UT State Radon Website
Phone

801-536-0091 

Fax Number  
State Resources
  • Eleanor Divver (edivver@utah.gov)
  • Utah Department of Health
    Email: hlthquestions@utah.gov
  • utah.gov
  • 800-458-0145
Radon Data
  • UT Zone Map from EPA
Regional Resources
  • Region 8; Indoor Air Quality
  • IED's Tribal Resources
  • Amanda Hong (Hong.Amanda@epa.gov)
    • 303-312-6221

Wyoming

Resource Title State Information
IAQ State Program

WY Department of Health

Program Website WY State Radon Website
Phone

307-777-3480

Fax Number 307-777-3765
State Resources
  • Randi Norton-Herrington
  • Wyoming Department of Health
    Phone: 307-777-7656
    Fax: 307-777-7439
  • wyo.gov
  • 800-264-1296
Radon Data
  • WY Zone Map from EPA
Regional Resources
  • Region 8; Indoor Air Quality
  • IED's Tribal Resources
  • Amanda Hong (Hong.Amanda@epa.gov)
    • 303-312-6221

Region 9 Office, State and Tribal Programs

Click on your state to find your state radon contact information and resources:

Arizona | California | Guam | Hawaii | Nevada

Arizona

Resource Title State Information
IAQ State Program

AZ Department of Health Services – Bureau of Radiation Control

Program Website AZ State Radon Website
Phone

602-255-4850

Fax Number 602-437-0705
State Resources
  • Rich Baker (Rich.Baker@azdhs.gov)
  • az.gov
  • AZ Dept. of Health Services
  • Webform Email
Radon Data
  • AZ Zone Map from EPA
Regional Resources
  • Region 9; Indoor Air Quality
  • IED's Tribal Resources
  • General Radon Inquiries:
    • Ryder Freed (freed.ryder@epa.gov)
    • 415-972-3267

California

Resource Title State Information
IAQ State Program

CA Indoor Radon Program

Program Website CA State Radon Website
Phone

916-449-5674

Fax Number 916-449-5665
State Resources
  • Radon Program Manager (Radonprogram@cdph.ca.gov)
  • Low-cost, Short Term Test Kits for California Residents
  • 800-745-7236
Radon Data
  • CA Zone Map from EPA
Regional Resources
  • Region 9; Indoor Air Quality
  • IED's Tribal Resources
  • General Radon Inquiries:
    • Ryder Freed (freed.ryder@epa.gov)
    • 415-972-3267

Guam

Resource Title State Information
IAQ State Program

GU Environmental Protection Agency

Program Website Guam Radon Website
Phone

671-300-4770

Fax Number 671-300-4531
State Resources
  • Michelle C. Razo Lastimoza (Michelle.Lastimoza@epa.guam.gov)
  • GU EPA Facebook
  • Department of Public Health and Social Services
  • guam.gov
Radon Data
  • None Available
Regional Resources
  • Region 9; Indoor Air Quality
  • IED's Tribal Resources
  • General Radon Inquiries:
    • Ryder Freed (freed.ryder@epa.gov)
    • 415-972-3267

Hawaii

Resource Title State Information
IAQ State Program

Noise Radiation and Indoor Air Quality Branch (NRIAQ)

Program Website HI State Radon Website
Phone

808-586-4700

Fax Number 808-586-5838
State Resources
  • Hawaii DOH main email (webmail@doh.hawaii.gov)
  • State Department of Health
  • hawaii.gov
  • Radon Testing in Your Home: Hawaii
Radon Data
  • HI Zone Map from EPA
Regional Resources
  • Region 9; Indoor Air Quality
  • IED's Tribal Resources
  • General Radon Inquiries:
    • Ryder Freed (freed.ryder@epa.gov)
    • 415-972-3267

Nevada

Resource Title State Information
IAQ State Program

University of Nevada, Reno Extension Nevada Radon Education Program

Program Website NV State Radon Website
Phone

775-784-4848

Fax Number  
State Resources
  • Christine Kelly (ChrisK@unr.edu)
  • 775-336-0252
  • Radon Testing in Your Home: Nevada
Radon Data
  • NV Zone Map from EPA
  • NV Public Health Data Explorer
Regional Resources
  • Region 9; Indoor Air Quality
  • IED's Tribal Resources
  • General Radon Inquiries:
    • Ryder Freed (freed.ryder@epa.gov)
    • 415-972-3267

Region 10 Office, State and Tribal Programs

Click on your state to find your state radon contact information and resources:

Alaska | Idaho | Oregon | Washington

Alaska

Resource Title State Information
IAQ State Program

AK Department of Environmental Conservation Division of Air Quality

Program Website AK State Radon Website
Phone

907-465-5100 

Fax Number 907-465-5129
State Resources
  • Jennifer Athey (Jennifer.Athey@alaska.gov)
  • Fairbanks Cooperative
  • AK Department of Health and Social Services
  • Alaska Division of Public Health
  • alaska.gov
  • AK Department of Environmental Conservation: 800-770-8973
    University of AK Cooperative: 800-478-8324
Radon Data
  • AK Zone Map from EPA
Regional Resources
  • Region 10; Indoor Air Quality
  • IED's Tribal Resources
  • Jim McAuley (mcauley.jim@epa.gov)
    • 206-553-1987
  • Gretchen Jankauskas-Stewart (Stewart.Gretchen@epa.gov)
    • 206-553-0527

Idaho

Resource Title State Information
IAQ State Program

ID Department of Health and Welfare Indoor Environment/Radon

Program Website ID State Radon Website
Phone

208-334-0606 

Fax Number 208-334-6573
State Resources
  • Carolee Cooper (Radon@dhw.idaho.gov)
  • ID Department of Health and Welfare
  • idaho.gov
  • 1-800-445-8647
Radon Data
  • ID Zone Map from EPA
Regional Resources
  • Region 10; Indoor Air Quality
  • IED's Tribal Resources
  • Jim McAuley (mcauley.jim@epa.gov)
    • 206-553-1987
  • Gretchen Jankauskas-Stewart (Stewart.Gretchen@epa.gov)
    • 206-553-0527

Oregon

Resource Title State Information
IAQ State Program

OR Health Authority, Public Health Division, Environmental Public Health Section, OR Radon Awareness Program

Program Website OR State Radon Website
Phone

971-673-0440

Fax Number 971-673-0979
State Resources
  • Brett Sherry (brett.w.sherry@oha.or.gov)
  • Jara Popinga (jara.popinga@oha.or.gov)
  • OR Health Authority Public Health Division
Radon Data
  • OR Radon Risk Map
  • OR Zone Map from EPA
Regional Resources
  • Region 10; Indoor Air Quality
  • IED's Tribal Resources
  • Jim McAuley (mcauley.jim@epa.gov)
    • 206-553-1987
  • Gretchen Jankauskas-Stewart (Stewart.Gretchen@epa.gov)
    • 206-553-0527

Washington

Resource Title State Information
IAQ State Program

WA State Department of Health, Community and Environment: Radon

Program Website WA State Radon Website
Phone

360-236-3200

Email DOH.Radon@doh.wa.gov
State Resources
  • Gary Garrety (Gary.Garrety@doh.wa.gov)
  • WA State Department of Health
Radon Data
  • WA Zone Map from EPA
  • DOH WA Tracking Network (WTN) On the Go
  • DOH WTN: A Source for Environmental Public Health Data
Regional Resources
  • Region 10; Indoor Air Quality
  • IED's Tribal Resources
  • Jim McAuley (mcauley.jim@epa.gov)
    • 206-553-1987
  • Gretchen Jankauskas-Stewart (Stewart.Gretchen@epa.gov)
    • 206-553-0527

Supplemental Information

  • Some states operate state-run credentialing programs. These programs exercise a statutory authority at the state level to oversee radon service providers by establishing and implementing requirements (e.g., licensing) to ensure radon testing and/or mitigation service providers have demonstrated and maintain sufficient professional competence. States with credentialing programs to date: CA, CO, CT, FL, IL, IN, IA, KS, KY, ME, MN, NE, NH, NJ, OH, PA, RI, UT, VA and WV.
  • Regional Radon Training Centers
  • National Radon Program Services (Operated by Kansas State University)
  • EPA's Indoor Air Quality Tribal Partners Program
  • EPA's State Environmental Agencies List
  • Tribal Indoor Air Quality Directory
  • Environmental Law Institute Database of Radon Laws
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on May 22, 2025
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