Toxic Chemical Detected in U.S. Air Raises Environmental Concerns

For the first time, researchers have detected medium-chain chlorinated paraffins (MCCPs) in the U.S. atmosphere, particularly over farmlands in Oklahoma. These industrial chemicals, used as flame retardants and plasticizers, are toxic to aquatic life and may pose health risks to humans.

The University of Colorado Boulder team suggests that MCCPs likely entered the air through biosolid fertilizers—treated sewage commonly spread on fields. This highlights a concerning pollution pathway, where chemicals applied to soil re-enter the environment via air.

Similar to already restricted short-chain paraffins, MCCPs are persistent and can travel long distances, accumulating in ecosystems and organisms. The findings call attention to the need for stricter regulation of biosolid use and better monitoring of airborne pollutants linked to agriculture and wastewater practices.

01-07-2025