Checked
Air Toxics Cancer Risk in Iowa
EPA AirToxScreen, 2020 emissions
- Average cancer risk
- 20 in a million
- 2020 emissions (latest EPA release)
- Population
- 3,190,369
- Counties
- 99
- Highest county
- Dallas
- 30 in a million
By county
Swipe the table sideways to see more columns.
| County | Total risk | Industrial point sources | Vehicles | Population |
|---|---|---|---|---|
| Adair | 20 in a million | 0.11 in a million | 0.38 in a million | 7,496 |
| Adams | 20 in a million | 0.061 in a million | 0.26 in a million | 3,704 |
| Allamakee | 20 in a million | 0.13 in a million | 0.45 in a million | 14,061 |
| Appanoose | 20 in a million | 0.027 in a million | 0.54 in a million | 12,317 |
| Audubon | 20 in a million | 0.029 in a million | 0.29 in a million | 5,674 |
| Benton | 20 in a million | 0.39 in a million | 0.51 in a million | 25,575 |
| Black Hawk | 20 in a million | 1 in a million | 0.73 in a million | 131,144 |
| Boone | 20 in a million | 0.94 in a million | 0.44 in a million | 26,715 |
| Bremer | 20 in a million | 0.25 in a million | 0.5 in a million | 24,988 |
| Buchanan | 20 in a million | 0.24 in a million | 0.46 in a million | 20,565 |
| Buena Vista | 20 in a million | 0.013 in a million | 0.49 in a million | 20,823 |
| Butler | 20 in a million | 0.19 in a million | 0.37 in a million | 14,334 |
| Calhoun | 20 in a million | 0.067 in a million | 0.24 in a million | 9,927 |
| Carroll | 20 in a million | 0.015 in a million | 0.31 in a million | 20,760 |
| Cass | 20 in a million | 0.089 in a million | 0.55 in a million | 13,127 |
| Cedar | 20 in a million | 0.39 in a million | 0.54 in a million | 18,505 |
| Cerro Gordo | 20 in a million | 0.16 in a million | 0.72 in a million | 43,127 |
| Cherokee | 20 in a million | 0.024 in a million | 0.41 in a million | 11,658 |
| Chickasaw | 20 in a million | 0.064 in a million | 0.42 in a million | 12,012 |
| Clarke | 20 in a million | 0.14 in a million | 0.48 in a million | 9,748 |
| Clay | 20 in a million | 0.038 in a million | 0.43 in a million | 16,384 |
| Clayton | 20 in a million | 0.071 in a million | 0.36 in a million | 17,043 |
| Clinton | 20 in a million | 0.88 in a million | 0.46 in a million | 46,460 |
| Crawford | 20 in a million | 0.028 in a million | 0.35 in a million | 16,525 |
| Dallas | 30 in a million | 2.5 in a million | 0.81 in a million | 99,678 |
| Davis | 20 in a million | 0.087 in a million | 0.34 in a million | 9,110 |
| Decatur | 20 in a million | 0.059 in a million | 0.42 in a million | 7,645 |
| Delaware | 20 in a million | 0.29 in a million | 0.43 in a million | 17,488 |
| Des Moines | 20 in a million | 0.24 in a million | 0.61 in a million | 38,910 |
| Dickinson | 20 in a million | 0.24 in a million | 0.33 in a million | 17,703 |
| Dubuque | 20 in a million | 0.25 in a million | 0.7 in a million | 99,266 |
| Emmet | 20 in a million | 0.11 in a million | 0.42 in a million | 9,388 |
| Fayette | 20 in a million | 0.16 in a million | 0.4 in a million | 19,509 |
| Floyd | 20 in a million | 0.094 in a million | 0.54 in a million | 15,627 |
| Franklin | 20 in a million | 0.15 in a million | 0.38 in a million | 10,019 |
| Fremont | 20 in a million | 0.2 in a million | 0.34 in a million | 6,605 |
| Greene | 20 in a million | 0.15 in a million | 0.3 in a million | 8,771 |
| Grundy | 20 in a million | 0.21 in a million | 0.39 in a million | 12,329 |
| Guthrie | 20 in a million | 0.23 in a million | 0.42 in a million | 10,623 |
| Hamilton | 20 in a million | 0.51 in a million | 0.36 in a million | 15,039 |
| Hancock | 20 in a million | 0.16 in a million | 0.29 in a million | 10,795 |
| Hardin | 20 in a million | 0.18 in a million | 0.36 in a million | 16,878 |
| Harrison | 20 in a million | 0.16 in a million | 0.47 in a million | 14,582 |
| Henry | 20 in a million | 0.67 in a million | 0.49 in a million | 20,482 |
| Howard | 20 in a million | 0.49 in a million | 0.3 in a million | 9,469 |
| Humboldt | 20 in a million | 0.31 in a million | 0.35 in a million | 9,597 |
| Ida | 20 in a million | 0.036 in a million | 0.28 in a million | 7,005 |
| Iowa | 20 in a million | 0.46 in a million | 0.49 in a million | 16,662 |
| Jackson | 20 in a million | 0.19 in a million | 0.44 in a million | 19,485 |
| Jasper | 20 in a million | 0.4 in a million | 0.69 in a million | 37,813 |
| Jefferson | 20 in a million | 1.3 in a million | 0.43 in a million | 15,663 |
| Johnson | 20 in a million | 0.81 in a million | 0.97 in a million | 152,854 |
| Jones | 20 in a million | 0.49 in a million | 0.56 in a million | 20,646 |
| Keokuk | 20 in a million | 0.28 in a million | 0.36 in a million | 10,033 |
| Kossuth | 20 in a million | 0.087 in a million | 0.25 in a million | 14,828 |
| Lee | 20 in a million | 0.25 in a million | 0.38 in a million | 33,555 |
| Linn | 30 in a million | 1.4 in a million | 1 in a million | 230,299 |
| Louisa | 20 in a million | 0.4 in a million | 0.39 in a million | 10,837 |
| Lucas | 20 in a million | 0.045 in a million | 0.39 in a million | 8,634 |
| Lyon | 20 in a million | 0.085 in a million | 0.28 in a million | 11,934 |
| Madison | 20 in a million | 0.64 in a million | 0.43 in a million | 16,548 |
| Mahaska | 20 in a million | 0.43 in a million | 0.49 in a million | 22,190 |
| Marion | 20 in a million | 0.25 in a million | 0.49 in a million | 33,414 |
| Marshall | 20 in a million | 0.55 in a million | 0.58 in a million | 40,105 |
| Mills | 20 in a million | 0.39 in a million | 0.52 in a million | 14,484 |
| Mitchell | 20 in a million | 0.15 in a million | 0.4 in a million | 10,565 |
| Monona | 20 in a million | 0.08 in a million | 0.45 in a million | 8,751 |
| Monroe | 20 in a million | 0.067 in a million | 0.45 in a million | 7,577 |
| Montgomery | 20 in a million | 0.12 in a million | 0.32 in a million | 10,330 |
| Muscatine | 20 in a million | 0.82 in a million | 0.59 in a million | 43,235 |
| O'Brien | 20 in a million | 0.045 in a million | 0.32 in a million | 14,182 |
| Osceola | 20 in a million | 0.07 in a million | 0.23 in a million | 6,192 |
| Page | 20 in a million | 0.29 in a million | 0.34 in a million | 15,211 |
| Palo Alto | 20 in a million | 0.068 in a million | 0.28 in a million | 8,996 |
| Plymouth | 20 in a million | 0.06 in a million | 0.41 in a million | 25,698 |
| Pocahontas | 20 in a million | 0.044 in a million | 0.28 in a million | 7,078 |
| Polk | 30 in a million | 6.6 in a million | 1.3 in a million | 492,401 |
| Pottawattamie | 30 in a million | 0.4 in a million | 1.2 in a million | 93,667 |
| Poweshiek | 20 in a million | 0.18 in a million | 0.58 in a million | 18,662 |
| Ringgold | 20 in a million | 0.044 in a million | 0.32 in a million | 4,663 |
| Sac | 20 in a million | 0.013 in a million | 0.26 in a million | 9,814 |
| Scott | 30 in a million | 0.41 in a million | 0.9 in a million | 174,669 |
| Shelby | 20 in a million | 0.031 in a million | 0.37 in a million | 11,746 |
| Sioux | 20 in a million | 0.11 in a million | 0.32 in a million | 35,872 |
| Story | 20 in a million | 1.3 in a million | 0.72 in a million | 98,537 |
| Tama | 20 in a million | 0.5 in a million | 0.44 in a million | 17,135 |
| Taylor | 20 in a million | 0.07 in a million | 0.3 in a million | 5,896 |
| Union | 20 in a million | 0.31 in a million | 0.33 in a million | 12,138 |
| Van Buren | 20 in a million | 0.2 in a million | 0.3 in a million | 7,203 |
| Wapello | 20 in a million | 0.21 in a million | 0.6 in a million | 35,437 |
| Warren | 30 in a million | 1.5 in a million | 0.74 in a million | 52,403 |
| Washington | 20 in a million | 0.4 in a million | 0.42 in a million | 22,565 |
| Wayne | 20 in a million | 0.068 in a million | 0.28 in a million | 6,497 |
| Webster | 20 in a million | 0.42 in a million | 0.63 in a million | 36,999 |
| Winnebago | 20 in a million | 0.18 in a million | 0.32 in a million | 10,679 |
| Winneshiek | 20 in a million | 0.1 in a million | 0.47 in a million | 20,070 |
| Woodbury | 20 in a million | 0.13 in a million | 0.84 in a million | 105,941 |
| Worth | 20 in a million | 0.22 in a million | 0.37 in a million | 7,443 |
| Wright | 20 in a million | 0.41 in a million | 0.33 in a million | 12,943 |
Top pollutants in Iowa
Largest contributors to the modeled cancer risk
Swipe the table sideways to see more columns.
| Pollutant | Cancer risk |
|---|---|
| Formaldehyde | 15.7 in a million |
| Carbon Tetrachloride | 2.9 in a million |
| Acetaldehyde | 1.4 in a million |
| Ethylene Oxide | 1.3 in a million |
| Benzene | 0.94 in a million |
| Naphthalene | 0.79 in a million |
| PAH/POM (polycyclic organic matter) | 0.66 in a million |
| 1,3-Butadiene | 0.24 in a million |
| Arsenic compounds | 0.11 in a million |
| Ethylbenzene | 0.11 in a million |
| Chromium VI (hexavalent) | 0.094 in a million |
| Nickel Compounds | 0.049 in a million |
AirToxScreen is EPA's screening estimate of the added lifetime cancer risk from breathing outdoor air toxics, modeled for the year shown. A risk of 30 in a million means that, if 1 million people breathed this air for 70 years, about 30 more might get cancer than otherwise. The estimates are averages for the population of an area, not measurements, and they do not cover indoor air, diesel particulate matter or other exposures. EPA rounds the total risk to one or two significant figures; the source and pollutant numbers are unrounded, so they do not always add up to the total. EPA advises against using these results to compare places or to judge risk for one person.
Source: U.S. Environmental Protection Agency, AirToxScreen 2020 · Last updated 12/31/2020
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