Seasonal occurrence of antibiotics and a beta agonist in an agriculturally-intensive watershed

Juan C. Jaimes-Correa, Daniel D. Snow, Shannon L. Bartelt-Hunt

Research output: Contribution to journalArticlepeer-review

40 Scopus citations


We evaluated the occurrence of 12 veterinary antibiotics and a beta agonist over spatial and temporal scales in Shell Creek, an intensively agricultural watershed in Nebraska, using Polar Organic Chemical Integrative Samplers (POCIS). Twelve pharmaceuticals were detected with concentrations ranging from 0.0003 ng/L to 68 ng/L. The antibiotics measured at the highest time-weighted average concentrations were lincomycin (68 ng/L) and monensin (49 ng/L), and both compounds were detected at increased concentrations in summer months. Analysis of variance indicates that mean concentrations of detected pharmaceuticals have no significant (p > 0.01) spatial variation. However, significant temporal differences (p < 0.01) were observed. This study demonstrates the utility of passive samplers such as POCIS for monitoring ambient levels of pharmaceuticals in surface waters.

Original languageEnglish (US)
Pages (from-to)87-96
Number of pages10
JournalEnvironmental Pollution
StatePublished - May 28 2015


  • Agriculture
  • Veterinary pharmaceuticals

ASJC Scopus subject areas

  • Toxicology
  • Pollution
  • Health, Toxicology and Mutagenesis


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