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SECTION AF101 SCOPE

AF101.1 General.

This appendix contains requirements for new construction in jurisdictions where radon-resistant construction is required.

Inclusion of this appendix by jurisdictions shall be determined through the use of locally available data or determination of Zone 1 designation in Figure AF101 and Table AF101(1).




a. pCi/L standard for picocuries per liter of radon gas. The U.S. Environmental Protection Agency (EPA) recommends that all homes that measure 4 pCi/L and greater be mitigated.
The EPA and the U.S. Geological Survey have evaluated the radon potential in the United States and have developed a map of radon zones designed to assist building officials in deciding whether radon-resistant features are applicable in new construction.
The map assigns each of the 3,141 counties in the United States to one of three zones based on radon potential. Each zone designation reflects the average short-term radon measurement that can be expected to be measured in a building without the implementation of radon-control methods. The radon zone designation of highest priority is Zone 1. Table AF101 lists the Zone 1 counties illustrated on the map. More detailed information can be obtained from state-specific booklets (EPA-402-R-93-021 through 070) available through State Radon Offices or from EPA Regional Offices.


FIGURE AF101 EPA MAP OF RADON ZONES

TABLE AF101(1) HIGH RADON-POTENTIAL (ZONE 1) COUNTIESa


ALABAMA CONNECTICUT Morgan Wabash Trego Jackson Watonwan
Calhoun Fairfield Moultrie Warren Wallace Kalamazoo Wilkin
Clay Middlesex Ogle Washington Washington Lenawee Winona
Cleburne New Haven Peoria Wayne Wichita St. Joseph Wright
Colbert New London Piatt Wells Wyandotte Washtenaw Yellow Medicine
Coosa GEORGIA Pike White KENTUCKY MINNESOTA MISSOURI
Franklin Cobb Putnam Whitley Adair Becker Andrew
Jackson De Kalb Rock Island IOWA Allen Big Stone Atchison
Lauderdale Fulton Sangamon All Counties Barren Blue Earth Buchanan
Lawrence Gwinnett Schuyler KANSAS Bourbon Brown Cass
Limestone IDAHO Scott Atchison Boyle Carver Clay
Madison Benewah Stark Barton Bullitt Chippewa Clinton
Morgan Blaine Stephenson Brown Casey Clay Holt
Talladega Boise Tazewell Cheyenne Clark Cottonwood Iron
CALIFORNIA Bonner Vermilion Clay Cumberland Dakota Jackson
Santa Barbara Boundary Warren Cloud Fayette Dodge Nodaway
Ventura Butte Whiteside Decatur Franklin Douglas Platte
COLORADO Camas Winnebago Dickinson Green Faribault MONTANA
Adams Clark Woodford Douglas Harrison Fillmore Beaverhead
Arapahoe Clearwater INDIANA Ellis Hart Freeborn Big Horn
Baca Custer Adams Ellsworth Jefferson Goodhue Blaine
Bent Elmore Allen Finney Jessamine Grant Broadwater
Boulder Fremont Bartholomew Ford Lincoln Hennepin Carbon
Chaffee Gooding Benton Geary Marion Houston Carter
Cheyenne Idaho Blackford Gove Mercer Hubbard Cascade
Clear Creek Kootenai Boone Graham Metcalfe Jackson Chouteau
Crowley Latah Carroll Grant Monroe Kanabec Custer
Custer Lemhi Cass Gray Nelson Kandiyohi Daniels
Delta Shoshone Clark Greeley Pendleton Kittson Dawson
Denver Valley Clinton Hamilton Pulaski Lac Qui Parle Deer Lodge
Dolores ILLINOIS De Kalb Haskell Robertson Le Sueur Fallon
Douglas Adams Decatur Hodgeman Russell Lincoln Fergus
El Paso Boone Delaware Jackson Scott Lyon Flathead
Elbert Brown Elkhart Jewell Taylor Mahnomen Gallatin
Fremont Bureau Fayette Johnson Warren Marshall Garfield
Garfield Calhoun Fountain Kearny Woodford Martin Glacier
Gilpin Carroll Fulton Kingman MAINE McLeod Granite
Grand Cass Grant Kiowa Androscoggin Meeker Hill
Gunnison Champaign Hamilton Lane Aroostook Mower Jefferson
Huerfano Coles Hancock Leavenworth Cumberland Murray Judith Basin
Jackson De Kalb Harrison Lincoln Franklin Nicollet Lake
Jefferson De Witt Hendricks Logan Hancock Nobles Lewis and Clark
Kiowa Douglas Henry Marion Kennebec Norman Madison
Kit Carson Edgar Howard Marshall Lincoln Olmsted McCone
Lake Ford Huntington McPherson Oxford Otter Tail Meagher
Larimer Fulton Jay Meade Penobscot Pennington Missoula
Las Animas Greene Jennings Mitchell Piscataquis Pipestone Park
Lincoln Grundy Johnson Nemaha Somerset Polk Phillips
Logan Hancock Kosciusko Ness York Pope Pondera
Mesa Henderson LaGrange Norton MARYLAND Ramsey Powder River
Moffat Henry Lawrence Osborne Baltimore Red Lake Powell
Montezuma Iroquois Madison Ottawa Calvert Redwood Prairie
Montrose Jersey Marion Pawnee Carroll Renville Ravalli
Morgan Jo Daviess Marshall Phillips Frederick Rice Richland
Otero Kane Miami Pottawatomie Harford Rock Roosevelt
Ouray Kendall Monroe Pratt Howard Roseau Rosebud
Park Knox Montgomery Rawlins Montgomery Scott Sanders
Phillips La Salle Noble Republic Washington Sherburne Sheridan
Pitkin Lee Orange Rice MASS. Sibley Silver Bow
Prowers Livingston Putnam Riley Essex Stearns Stillwater
Pueblo Logan Randolph Rooks Middlesex Steele Teton
Rio Blanco Macon Rush Rush Worcester Stevens Toole
San Miguel Marshall Scott Saline MICHIGAN Swift Valley
Summit Mason Shelby Scott Branch Todd Wibaux
Teller McDonough St. Joseph Sheridan Calhoun Traverse Yellowstone
Washington McLean Steuben Sherman Cass Wabasha
Weld Menard Tippecanoe Smith Wadena
Yuma Mercer Tipton Stanton Waseca
Union Thomas Washington
Vermillion


(continued)


a. The EPA recommends that this county listing be supplemented with other available State and local data to further understand the radon potential of a Zone 1 area.


TABLE AF101(1)—continued HIGH RADON-POTENTIAL (ZONE 1) COUNTIESa


NEBRASKA Hunterdon Belmont Delaware McPherson Bland Hancock
Adams Mercer Butler Franklin Miner Botetourt Hardy
Boone Monmouth Carroll Fulton Minnehaha Bristol Jefferson
Boyd Morris Champaign Huntingdon Moody Brunswick Marshall
Burt Somerset Clark Indiana Perkins Buckingham Mercer
Butler Sussex Clinton Juniata Potter Buena Vista Mineral
Cass Warren Columbiana Lackawanna Roberts Campbell Monongalia
Cedar Coshocton Lancaster Sanborn Chesterfield Monroe
Clay NEW MEXICO Crawford Lebanon Spink Clarke Morgan
Colfax Bernalillo Darke Lehigh Stanley Clifton Forge Ohio
Cuming Colfax Delaware Luzerne Sully Covington Pendleton
Dakota Mora Fairfield Lycoming Turner Craig Pocahontas
Dixon Rio Arriba Fayette Mifflin Union Cumberland Preston
Dodge San Miguel Franklin Monroe Walworth Danville Summers
Douglas Santa Fe Greene Montgomery Yankton Dinwiddie Wetzel
Fillmore Taos Guernsey Montour Fairfax
Franklin Hamilton Northampton TENNESEE Falls Church WISCONSIN
Frontier NEW YORK Hancock Northumberland Anderson Fluvanna Buffalo
Furnas Albany Hardin Perry Bedford Frederick Crawford
Gage Allegany Harrison Schuylkill Blount Fredericksburg Dane
Gosper Broome Holmes Snyder Bradley Giles Dodge
Greeley Cattaraugus Huron Sullivan Claiborne Goochland Door
Hamilton Cayuga Jefferson Susquehanna Davidson Harrisonburg Fond du Lac
Harlan Chautauqua Knox Tioga Giles Henry Grant
Hayes Chemung Licking Union Grainger Highland Green
Hitchcock Chenango Logan Venango Greene Lee Green Lake
Hurston Columbia Madison Westmoreland Hamblen Lexington Iowa
Jefferson Cortland Marion Wyoming Hancock Louisa Jefferson
Johnson Delaware Mercer York Hawkins Martinsville Lafayette
Kearney Dutchess Miami Hickman Montgomery Langlade
Knox Erie Montgomery RHODE ISLAND Humphreys Nottoway Marathon
Lancaster Genesee Morrow Kent Jackson Orange Menominee
Madison Greene Muskingum Washington Jefferson Page Pepin
Nance Livingston Perry Knox Patrick Pierce
Nemaha Madison Pickaway S. CAROLINA Lawrence Pittsylvania Portage
Nuckolls Onondaga Pike Greenville Lewis Powhatan Richland
Otoe Ontario Preble Lincoln Pulaski Rock
Pawnee Orange Richland S. DAKOTA Loudon Radford Shawano
Phelps Otsego Ross Aurora Marshall Roanoke St. Croix
Pierce Putnam Seneca Beadle Maury Rockbridge Vernon
Platte Rensselaer Shelby Bon Homme McMinn Rockingham Walworth
Polk Schoharie Stark Brookings Meigs Russell Washington
Red Willow Schuyler Summit Brown Monroe Salem Waukesha
Richardson Seneca Tuscarawas Brule Moore Scott Waupaca
Saline Steuben Union Buffalo Perry Shenandoah Wood
Sarpy Sullivan Van Wert Campbell Roane Smyth
Saunders Tioga Warren Charles Mix Rutherford Spotsylvania WYOMING
Seward Tompkins Wayne Clark Smith Stafford Albany
Stanton Ulster Wyandot Clay Sullivan Staunton Big Horn
Thayer Washington Codington Trousdale Tazewell Campbell
Washington Wyoming PENNSYLVANIA Corson Union Warren Carbon
Wayne Yates Adams Davison Washington Washington Converse
Webster Allegheny Day Wayne Waynesboro Crook
York N. CAROLINA Armstrong Deuel Williamson Winchester Fremont
Alleghany Beaver Douglas Wilson Wythe Goshen
NEVADA Buncombe Bedford Edmunds Hot Springs
Carson City Cherokee Berks Faulk UTAH WASHINGTON Johnson
Douglas Henderson Blair Grant Carbon Clark Laramie
Eureka Mitchell Bradford Hamlin Duchesne Ferry Lincoln
Lander Rockingham Bucks Hand Grand Okanogan Natrona
Lincoln Transylvania Butler Hanson Piute Pend Oreille Niobrara
Lyon Watauga Cameron Hughes Sanpete Skamania Park
Mineral Carbon Hutchinson Sevier Spokane Sheridan
Pershing N. DAKOTA Centre Hyde Uintah Stevens Sublette
White Pine All Counties Chester Jerauld Sweetwater
Clarion Kingsbury VIRGINIA W. VIRGINIA Teton
NEW OHIO Clearfield Lake Alleghany Berkeley Uinta
HAMPSHIRE Adams Clinton Lincoln Amelia Brooke Washakie
Carroll Allen Columbia Lyman Appomattox Grant
Ashland Cumberland Marshall Augusta Greenbrier
NEW JERSEY Auglaize Dauphin McCook Bath Hampshire

a. The EPA recommends that this county listing be supplemented with other available State and local data to further understand the radon potential of a Zone 1
area.