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Air Toxics Cancer Risk in Wyoming

EPA AirToxScreen, 2020 emissions

Average cancer risk
20 in a million
Population
576,851
Counties
23
Highest county
Albany
20 in a million

Where the risk comes from in Wyoming

Estimated lifetime cancer risk per million people, by type of source

  • Formed in the air (secondary)8.4 in a million52.4%
  • Background2.5 in a million15.5%
  • Wildfires and prescribed fires1.6 in a million10.1%
  • Residential wood burning1.3 in a million7.9%
  • Natural vegetation (biogenic)0.81 in a million5.0%
  • Cars, trucks and buses0.57 in a million3.5%
  • Nonroad engines, ships, trains and airports0.31 in a million1.9%
  • Small and area sources (nonpoint)0.29 in a million1.8%
  • Industrial and other stationary point sources0.29 in a million1.8%

Top pollutants in Wyoming

Largest contributors to the modeled cancer risk

Swipe the table sideways to see more columns.

PollutantCancer risk
Formaldehyde9.9 in a million
Carbon Tetrachloride2.5 in a million
Acetaldehyde0.84 in a million
Naphthalene0.75 in a million
Benzene0.71 in a million
PAH/POM (polycyclic organic matter)0.7 in a million
1,3-Butadiene0.27 in a million
Arsenic compounds0.15 in a million
Chromium VI (hexavalent)0.085 in a million
Benzo[a]pyrene0.062 in a million
Ethylbenzene0.045 in a million
Nickel Compounds0.032 in a million

By county

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CountyTotal riskIndustrial point sourcesVehiclesPopulation
Albany20 in a million0.14 in a million0.67 in a million37,066
Big Horn10 in a million0.058 in a million0.17 in a million11,521
Campbell20 in a million0.14 in a million0.54 in a million47,026
Carbon10 in a million0.21 in a million0.36 in a million14,537
Converse10 in a million0.22 in a million0.29 in a million13,751
Crook20 in a million0.067 in a million0.17 in a million7,181
Fremont10 in a million0.063 in a million0.42 in a million39,234
Goshen20 in a million0.057 in a million0.32 in a million12,498
Hot Springs10 in a million0.012 in a million0.22 in a million4,621
Johnson10 in a million0.015 in a million0.33 in a million8,447
Laramie20 in a million0.3 in a million0.94 in a million100,512
Lincoln10 in a million0.13 in a million0.19 in a million19,581
Natrona20 in a million0.088 in a million0.68 in a million79,955
Niobrara10 in a million0.028 in a million0.15 in a million2,467
Park10 in a million0.021 in a million0.35 in a million29,624
Platte20 in a million0.089 in a million0.22 in a million8,605
Sheridan20 in a million0.021 in a million0.61 in a million30,921
Sublette10 in a million0.26 in a million0.16 in a million8,728
Sweetwater20 in a million2.1 in a million0.77 in a million42,272
Teton10 in a millionLess than 0.01 in a million0.36 in a million23,331
Uinta10 in a million0.32 in a million0.48 in a million20,450
Washakie10 in a million0.19 in a million0.26 in a million7,685
Weston20 in a million0.35 in a million0.16 in a million6,838

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