Here is the state website if you click on “About Pollutants” it explains what is in the air and where it comes from and how it affects you.
Here is the SLC site. They have a chart that shows which sources contribute to the problem – they blame the biggest portion on cars.
Here is 2012 Deseret News article:
This is the site for Utah Physicians for a Healthy Environment. They are pushing to stop expansion of the Holly Refinery and point to it as a major polluter.
Facts About Chlorine
Chlorine gas is heavier than air and will typically remain in low lying areas.
Mag Corp Research:
For many years, according to the EPA, this plant was the nation’s worst air polluter, releasing hundreds of tons of chlorine per day from its stack, which was around 90% of the chlorine emitted into the atmosphere from all sources nationwide. After a federal lawsuit was filed against the company in the late 1990’s, claiming nearly $1 billion for environmental infractions, the company that owned the plant, MagCorp, filed for bankruptcy protection. A new company, called U.S. Magnesium, now operates the plant, and has cleaned up much of its emissions, releasing a few tons of chlorine per day, as opposed to a few hundred tons, as it did in the 1980s
US Magnesium as a superfund cite: http://www2.epa.gov/region8/us-magnesium
toxicology report filed on U.S. Magnesium
Information about reaction and effects of dioxin exposure: http://www2.epa.gov/sites/production/files/documents/HHRA06Feb07.pdf
More on Renco (who owns US Magnesium)
Renco boasts over $5 billion in annual revenue