The information provided by MDCH and the MDEQ indicates most of the soil contamination at the site has been removed.

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The remaining soil contamination is located several feet below uncontaminated surface soil.

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In Washtenaw County and Ann Arbor, Michigan a 1, 4-Dioxane, in groundwater and surface soil contamination from Gelman Science, persists after nearly 20 years of cleanup activities and has now spread in groundwater to an area over three miles long and a mile wide.

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And what prevents soil and surface water contamination from countless units that ultimately wind up in landfills?

FORBES: How Many Politicians Are Needed To Screw Up A Light Bulb?

The culprit parasite, Toxoplasma gondii, can get into the food chain via cats faeces causing contamination of soil, water and plants.

BBC: Infection risk posed by cats revealed

Heavy-metal contamination in China's soil also includes high amounts of lead and arsenic.

WSJ: Cadmium-Tainted Rice Found in Guangzhou