Ractopamine in particulate matter emitted from beef cattle feedyards and playa wetlands in the Central Plains

Kimberly J. Wooten, Melissa A. Sandoz, Philip N. Smith

Research output: Contribution to journalArticle

2 Scopus citations


Beef cattle in the United States are routinely administered ractopamine, a β-adrenergic receptor agonist, to enhance growth. The present study is the first to quantify ractopamine in feedyard-emitted particulate matter and playa wetlands near feedyards. Ractopamine was present in 92% of particulate matter samples, 16% of playa sediment samples, and 3% of playa water samples, at maximum concentrations of 4.7 μg/g, 5.2 ng/g (dry wt), and 271 ng/L, respectively. These data suggest that aerial transmission and deposition of particulate matter is a transport mechanism for ractopamine between feedyards and aquatic systems in the region. Environ Toxicol Chem 2018;37:970–974.

Original languageEnglish
Pages (from-to)970-974
Number of pages5
JournalEnvironmental Toxicology and Chemistry
Issue number4
StatePublished - Apr 2018



  • Air pollution
  • Feedyard
  • Pharmaceuticals
  • Ractopamine
  • Wetlands

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