Perchlorate, thiocyanate, and nitrate in edible cole crops (Brassica sp.) produced in the lower Colorado River region

C. A. Sanchez, B. C. Blount, L. Valentin-Blasini, R. I. Krieger

Research output: Contribution to journalArticle

19 Scopus citations


The Colorado River is contaminated with low levels of perchlorate. Perchlorate has the potential to disrupt thyroid function by inhibiting the uptake of iodide. Brassica are rich sources of thiocyanate and nitrate, also inhibitors of iodide uptake. This study was conducted to estimate potential human exposure to perchlorate, thiocyanate, and nitrate from Brassica sp. irrigated with Colorado River water. Results indicate that Brassica sp. irrigated with Colorado River water do accumulate trace levels of perchlorate. However, the levels of perchlorate observed are low relative to the nitrate and thiocyanate naturally present in these species and low relative to the reference dose recommended by the NAS and the USEPA.

Original languageEnglish (US)
Pages (from-to)655-659
Number of pages5
JournalBulletin of Environmental Contamination and Toxicology
Issue number6
StatePublished - Dec 1 2007



  • Goitrogens
  • Nitrate
  • Perchlorate exposure
  • Thiocyanate
  • Thyroid

ASJC Scopus subject areas

  • Toxicology
  • Pollution
  • Health, Toxicology and Mutagenesis

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