Radon Test Results by Addison 51 37.3% 13.8 Algonquin 100+ 33.4% 37.9 Alsip 8 12.5% 4.1 Amboy 5 0.0% 3.1 Andres 1 0.0% 3.0 Antioch 100+ 36.5% 15.3 Arlington Heights 100+ 30.2% 32.2 Ashton 1 0.0% 1.7 Athens 1 100.0% 10.9 Aurora 100+ 37.9% 39.9 Bannockburn 9 11.1% 5.8 Barrington 100+ 35.7% 18.1 Barrington Hills 98 43.9% 24.5 Bartlett 100+ 36.3% 26.5 Batavia 100+ 49.8% 43.0 Beach Park 24 33.3% 13.6 Bedford Park 1 0.0% 1.5 Beecher 4 75.0% 16.0 Belleville 1 100.0% 8.5 Bellwood 3 0.0% 2.0 Belvidere 38 50.0% 27.2 Bensenville 17 58.8% 15.1 Berkeley 11 0.0% 3.5 Berwyn 32 21.9% 9.9 Big Rock 7 85.7% 5.9 Bloomfield 2 50.0% 9.2 Bloomingdale 100+ 43.1% 34.4 Blue Island 2 100.0% 23.7 Bolingbrook 100+ 50.1% 36.5 Bonfield 1 100.0% 5.6 Bourbonnais 20 45.0% 9.1 Braceville 1 0.0% 1.2 Bradley 6 0.0% 3.3 Braidwood 8 0.0% 2.3 Bridgeview 2 0.0% 1.4 Brighton 1 0.0% 1.4 Brighton Township 1 0.0% 2.7 Bristol 20 55.0% 20.8 Broadview 3 33.3% 13.8 Brookfield 79 40.5% 29.0 The data collected represents more than 30,000 and does not contain invalid or post-mitigation test results. In All Rights Reserved 2011 Radon Detection Specialists, Inc. 1 Buffalo Grove 100+ 26.4% 26.9 Bull Valley 4 75.0% 13.9 Burbank 2 0.0% 2.3 Burlington 10 60.0% 10.4 Burr Ridge 100+ 39.6% 34.6 Byron 22 54.5% 71.5 Caledonia 17 58.8% 38.2 Calumet 1 0.0% 0.8 Campton Hills 1 100.0% 5.8 Capron 1 100.0% 4.1 Carol Stream 100+ 25.5% 28.2 Carpentersville 88 42.0% 29.7 Cary 100+ 48.4% 37.7 Chana 1 0.0% 1.8 Channahon 72 52.8% 29.9 Chatham 2 50.0% 7.1 Cherry Valley 7 42.9% 7.1 Chicago 100+ 6.6% 18.6 Chicago Heights 6 16.7% 9.3 Chicago Ridge 3 0.0% 3.6 Cicero 3 33.3% 4.5 Clare 1 100.0% 5.7 Clarendon Hills 100+ 32.0% 26.6 Coal 5 20.0% 4.6 Collinsville 1 0.0% 1.0 Compton 2 100.0% 24.1 Cortland 22 45.5% 16.7 Country Club Hills 4 50.0% 6.5 Countryside 17 35.3% 6.2 Crest Hill 24 58.3% 8.4 Creston 1 0.0% 1.1 Crestwood 5 0.0% 2.9 Crete 11 63.6% 15.2 Crystal Lake 100+ 43.1% 43.1 Custer Park 2 50.0% 5.4 Dakota 1 100.0% 4.5 Darien 100+ 45.4% 63.7 Davis 5 80.0% 12.2 Davis Junction 2 50.0% 4.3 Deer Grove 1 0.0% 3.7
Radon Test Results by Deer Park 68 45.6% 35.9 Deerfield 100+ 25.0% 18.7 Dekalb 100+ 43.3% 27.2 Delavan 2 50.0% 9.2 Des Plaines 100+ 27.7% 23.3 Diamond 5 0.0% 3.8 Dixon 100+ 42.7% 43.1 Dolton 1 0.0% 0.6 Downers Grove 100+ 47.9% 96.0 Dundee 9 55.6% 15.0 Dunlap 1 0.0% 0.6 Durand 2 0.0% 3.6 Dwight 6 50.0% 15.2 Earlville 4 0.0% 2.4 East Dundee 9 11.1% 4.0 East Troy 2 100.0% 18.9 Edelstein 1 0.0% 3.2 Elburn 100+ 44.6% 28.9 Elgin 100+ 48.5% 43.0 Elk Grove Village 76 22.4% 10.2 Elmhurst 100+ 38.0% 41.4 Elmwood Park 22 4.5% 4.6 Elwood 5 60.0% 9.1 Emerson 1 100.0% 4.1 Esmund 1 100.0% 26.4 Essex 1 0.0% 2.7 Eureka 4 75.0% 26.4 Evanston 100+ 2.5% 8.5 Evergreen Park 9 0.0% 3.8 Fairview Heights 1 0.0% 1.9 Fenton 1 100.0% 4.4 Flossmoor 23 26.1% 9.4 Fontana 8 25.0% 7.0 Forest Park 26 23.1% 6.2 Forestview 1 0.0% 0.9 Forreston 1 100.0% 9.7 Fort Sheridan 1 0.0% 1.4 Fox Lake 20 35.0% 16.0 Fox River Grove 48 41.7% 22.1 Fox River Valley 1 0.0% 2.2 The data collected represents more than 30,000 and does not contain invalid or post-mitigation test results. In All Rights Reserved 2011 Radon Detection Specialists, Inc. 2 Frankfort 100+ 26.8% 17.3 Franklin Park 4 0.0% 2.7 Freeport 44 70.5% 36.9 Gages Lake 6 50.0% 11.7 Gardner 1 0.0% 1.8 Geneva 100+ 50.5% 39.4 Genoa 49 55.1% 17.5 Genoa 7 71.4% 20.3 German Valley 1 100.0% 12.9 Germantown 2 50.0% 4.0 Gilberts 32 15.6% 5.9 Glen Ellyn 100+ 41.7% 45.5 Glencoe 100+ 13.4% 10.0 Glendale Heights 37 21.6% 9.4 Glenview 100+ 22.4% 23.2 Glenwood 2 0.0% 2.1 Golf 6 50.0% 12.9 Grand Detour 2 50.0% 8.0 Grandridge 1 100.0% 7.0 Grant Park 1 100.0% 6.4 Granville 2 50.0% 5.0 Grayslake 100+ 31.6% 49.9 Great Lakes 1 100.0% 4.7 Green Oaks 38 34.2% 17.4 Gurnee 100+ 36.9% 44.6 Hainesville 34 14.7% 6.1 Hampshire 38 31.6% 8.8 Hanover Park 35 17.1% 14.7 Harding 1 100.0% 7.1 Harmon 2 0.0% 1.3 Harvard 30 46.7% 29.2 Harvey 1 0.0% 0.8 Harwood Heights 3 0.0% 3.3 Hawthorn Woods 100+ 37.6% 17.6 Hazelcrest 1 0.0% 2.8 Hebron 8 37.5% 16.9 Herscher 1 100.0% 4.1 Hickory Hills 5 20.0% 26.3 Highland Park 100+ 24.1% 15.0 Highwood 11 45.5% 7.5
Radon Test Results by Hillcrest 1 100.0% 6.7 Hillside 3 33.3% 8.0 Hinckley 13 46.2% 19.0 Hinsdale 100+ 46.0% 48.8 Hoffman Estates 100+ 26.5% 19.3 Homer Glen 80 47.5% 17.4 Homewood 18 38.9% 10.1 Huntley 100+ 22.7% 20.6 Indian Creek 5 20.0% 8.0 Indian Head Park 34 26.5% 16.8 Ingleside 18 38.9% 12.0 Inverness 100+ 44.8% 48.8 Island Lake 29 27.6% 8.8 Itasca 42 35.7% 12.6 Ivanhoe 21 14.3% 4.6 Johnsburg 32 40.6% 8.7 Joliet 100+ 55.9% 73.8 Justice 4 0.0% 2.4 Kaneville 2 100.0% 9.1 Kankakee 9 33.3% 11.0 Kansasville 1 100.0% 8.5 Kenilworth 21 4.8% 4.1 Kenosha 23 21.7% 12.7 Kildeer 100+ 39.6% 31.4 Kingston 8 75.0% 22.8 Kirkland 8 50.0% 17.0 La Grange 100+ 38.3% 32.9 La Grange 12 25.0% 14.6 Highlands La Grange Park 100+ 37.9% 22.2 Ladd 1 0.0% 2.2 LaFox 3 100.0% 11.3 Lake Barrington 88 37.5% 28.3 Lake Barrington 32 46.9% 12.3 Shores Lake Bluff 100+ 28.7% 24.0 Lake Forest 100+ 30.3% 20.7 Lake Geneva 6 50.0% 32.8 Lake Holiday 9 55.6% 14.2 Lake in the Hills 100+ 28.9% 16.6 The data collected represents more than 30,000 and does not contain invalid or post-mitigation test results. In All Rights Reserved 2011 Radon Detection Specialists, Inc. 3 Lake Somerset 4 75.0% 19.5 Lake Villa 100+ 28.9% 16.7 Lake Zurich 100+ 27.1% 20.9 Lakemoor 17 41.2% 16.0 Lakewood 67 38.8% 11.4 Lansing 6 16.7% 6.8 LaSalle 8 37.5% 7.6 Leaf River 2 0.0% 3.6 Lee 4 50.0% 7.8 Leland 4 25.0% 8.3 Lemont 100+ 41.6% 27.7 Lena 2 50.0% 4.0 Libertyville 100+ 37.3% 44.7 Lincolnshire 100+ 36.6% 53.4 Lincolnwood 11 0.0% 3.4 Lindenhurst 100+ 26.7% 30.1 Lisle 100+ 59.4% 38.5 Lockport 100+ 43.0% 20.0 Lombard 100+ 44.2% 57.0 Long Grove 100+ 47.4% 23.2 Loves Park 100+ 31.6% 6.3 Lyndon 1 0.0% 1.5 Lynwood 2 0.0% 1.7 Lyons 6 16.7% 4.2 Machesney Park 18 22.2% 5.9 Malta 8 50.0% 25.7 Manhattan 13 46.2% 10.5 Manteno 4 50.0% 13.6 Maple Park 20 60.0% 25.4 Marengo 37 40.5% 16.9 Markham 1 0.0% 0.8 Marseilles 13 53.8% 20.7 Matteson 8 50.0% 11.3 Maywood 2 0.0% 0.8 McHenry 100+ 44.5% 17.0 McHenry Shores 1 100.0% 7.1 Medinah 17 64.7% 52.0 Melrose Park 5 40.0% 6.6 Mendota 2 50.0% 4.6 Merrionette Park 1 0.0% 0.7
Radon Test Results by Metamora 1 0.0% 0.7 Mettawa 6 33.3% 4.2 Midlothian 4 25.0% 4.4 Milan 1 100.0% 5.7 Millbrook 2 50.0% 4.9 Milledgeville 3 100.0% 15.0 Minooka 41 58.5% 162.0 Mokena 51 39.2% 23.2 Momence 1 100.0% 19.6 Monee 14 14.3% 6.1 Montgomery 93 53.8% 49.9 Morris 40 30.0% 28.3 Morrison 68 42.6% 24.3 Morton Grove 48 27.1% 19.2 Mount Carroll 1 0.0% 2.9 Mount Morris 2 100.0% 15.0 Mount Prospect 100+ 21.2% 24.5 Mundelein 100+ 36.3% 37.7 Naperville 100+ 47.7% 68.5 New Lenox 100+ 53.4% 122.0 Newark 11 81.8% 26.8 Niles 21 4.8% 4.1 Normal 1 100.0% 4.1 Norridge 8 0.0% 2.7 North Aurora 100+ 36.5% 16.5 North Barrington 100+ 38.0% 17.3 North Chicago 8 37.5% 8.9 North Riverside 16 12.5% 6.5 Northbrook 100+ 27.3% 33.5 Northfield 19 15.8% 5.4 Northlake 4 50.0% 6.6 Norway Twp 1 100.0% 7.3 Oak Brook 100+ 55.8% 24.8 Oak Forest 22 9.1% 6.7 Oak Lawn 21 9.5% 4.9 Oak Park 100+ 31.4% 16.2 Oakbrook Terrace 13 23.1% 5.1 Oakwood Hills 6 66.7% 12.9 Odell 1 100.0% 18.0 Oglesby 6 33.3% 6.8 The data collected represents more than 30,000 and does not contain invalid or post-mitigation test results. In All Rights Reserved 2011 Radon Detection Specialists, Inc. 4 Old Mill Creek 1 0.0% 3.7 Olympia Fields 8 12.5% 4.4 Oregon 14 57.1% 110.0 Orland Hills 6 16.7% 4.7 Orland Park 100+ 23.4% 18.5 Oswego 100+ 45.9% 50.4 Ottawa 90 47.8% 82.7 Paddock Lake 2 50.0% 17.9 Palatine 100+ 34.1% 24.5 Palos Heights 33 33.3% 18.2 Palos Hills 15 40.0% 8.5 Palos Park 33 24.2% 21.0 Paris 1 0.0% 1.2 Park 1 100.0% 5.4 Park Forest 3 0.0% 1.9 Park Ridge 100+ 16.5% 21.5 Paw Paw 4 25.0% 17.7 Pecatonica 3 66.7% 8.0 Pell Lake 2 100.0% 6.2 Peoria 1 100.0% 9.9 Peotone 3 33.3% 5.8 Peru 10 40.0% 9.4 Pingree Grove 10 20.0% 4.9 Plainfield 100+ 49.1% 70.0 Plano 17 47.1% 15.9 Plato Center 1 0.0% 2.2 Pleasant Prairie 7 71.4% 8.6 Polo 8 37.5% 32.2 Pontiac 1 0.0% 10.7 Poplar Grove 19 73.7% 26.1 Port Barrington 22 13.6% 5.6 Posen 1 0.0% 1.3 Prairie Grove 9 55.6% 9.2 Prairie View 3 66.7% 9.1 Princeton 5 80.0% 20.5 Prophetstown 11 27.3% 23.6 Prospect Heights 36 38.9% 18.6 Racine 9 55.6% 12.6 Randall 2 50.0% 4.0 Randall Twp 1 100.0% 26.6
Radon Test Results by Richmond 15 46.7% 15.4 Richton Park 6 16.7% 7.0 Ringwood 7 14.3% 4.1 River Forest 100+ 30.1% 26.7 River Grove 4 25.0% 4.1 Riverdale 2 0.0% 2.0 Riverside 86 31.4% 30.9 Riverwoods 66 27.3% 17.8 Rochelle 43 53.5% 15.0 Rock Falls 27 25.9% 10.3 Rock Island 1 0.0% 1.3 Rockford 100+ 38.0% 14.0 Rockton 17 47.1% 10.0 Rolling Meadows 87 43.7% 41.5 Romeoville 100+ 68.6% 39.6 Roscoe 34 23.5% 11.4 Roselle 85 36.5% 18.6 Rosemont 1 0.0% 3.4 Round Lake 100+ 31.9% 36.2 Round Lake Beach 76 21.1% 11.6 Round Lake 8 12.5% 5.6 Heights Round Lake Park 2 50.0% 4.4 Salem 16 62.5% 13.8 Sandwich 40 72.5% 61.2 Savanna 1 100.0% 7.6 Scarbaro 1 0.0% 2.5 Schaumburg 100+ 31.0% 26.7 Schiller Park 3 66.7% 8.8 Seneca 4 50.0% 9.0 Shabbona 3 66.7% 8.4 Shannon 1 100.0% 6.7 Sharon 1 0.0% 2.1 Sheffield 1 0.0% 4.3 Sheridan 7 57.1% 21.7 Sherman 1 0.0% 1.8 Shorewood 77 53.2% 56.3 Silver Lake 4 25.0% 15.2 Skokie 61 4.9% 9.0 Sleepy Hollow 33 69.7% 51.5 The data collected represents more than 30,000 and does not contain invalid or post-mitigation test results. In All Rights Reserved 2011 Radon Detection Specialists, Inc. 5 Somonauk 29 44.8% 20.3 South Barrington 97 35.1% 17.4 South Beloit 4 50.0% 20.3 South Elgin 100+ 47.6% 48.0 South Holland 7 0.0% 2.6 Spring Grove 74 62.2% 35.4 Spring Valley 2 50.0% 11.1 Springfield 15 46.7% 8.6 St Anne 7 85.7% 16.0 St Charles 100+ 47.7% 59.2 St Jacob 1 0.0% 0.9 Steger 4 25.0% 7.0 Sterling 82 54.9% 35.0 Steward 2 50.0% 5.6 Stickney 5 0.0% 1.6 Stillman Valley 4 25.0% 44.1 Stockton 1 100.0% 5.2 Streamwood 100+ 39.2% 12.1 Streator 11 54.5% 18.5 Sugar Grove 77 59.7% 31.8 Summit 2 0.0% 2.9 Sycamore 100+ 34.4% 20.5 Tampico 2 50.0% 4.3 Third Lake 5 20.0% 5.0 Tinley Park 72 18.1% 20.8 Tower Lakes 33 54.5% 10.7 Trevor 6 83.3% 15.9 Twin Lakes 11 63.6% 11.4 Union 1 0.0% 2.3 Union Grove 1 0.0% 0.8 University Park 3 0.0% 1.4 Utica 3 33.3% 5.3 Vernon Hills 100+ 27.3% 40.0 Verona 3 100.0% 8.0 Villa Park 83 34.9% 31.2 Virden 1 100.0% 8.2 Virgil 2 0.0% 2.9 Volo 8 25.0% 9.9 Wadsworth 76 35.5% 16.2 Walnut 1 0.0% 2.4
Radon Test Results by Walworth 3 100.0% 10.7 Warrenville 70 48.6% 45.2 Washington 8 12.5% 5.3 Waterman 4 25.0% 4.3 Wauconda 81 35.8% 20.0 Waukegan 73 30.1% 32.9 Wayne 21 61.9% 14.6 West Brooklyn 1 0.0% 2.7 West Chicago 100+ 50.3% 43.2 West Dundee 44 61.4% 36.5 Westchester 80 25.0% 19.6 Western Springs 100+ 33.8% 54.7 Westmont 100+ 48.9% 30.5 Wheaton 100+ 53.8% 51.1 Wheeling 52 19.2% 10.5 Wildwood 13 61.5% 11.3 Williams Bay 1 100.0% 7.0 Willow Springs 39 56.4% 35.2 Willowbrook 71 38.0% 28.6 Wilmette 100+ 8.9% 12.4 Wilmington 8 12.5% 7.1 Wilmot 1 100.0% 8.3 Winfield 96 41.7% 22.5 Winnebago 10 50.0% 7.3 Winnetka 100+ 8.8% 8.9 Winthrop Harbor 12 25.0% 12.1 Wonder Lake 27 55.6% 19.4 Wood Dale 19 42.1% 14.4 Woodridge 100+ 39.1% 34.9 Woodstock 100+ 37.2% 30.5 Worth 6 50.0% 19.0 Yorkville 100+ 59.5% 19.8 Zion 20 35.0% 20.6 Grand Total 34447 37.8% 162.0 The data collected represents more than 30,000 and does not contain invalid or post-mitigation test results. In All Rights Reserved 2011 Radon Detection Specialists, Inc. 6