Perchlorate in pleistocene and holocene groundwater in north-central New Mexico.

  title={Perchlorate in pleistocene and holocene groundwater in north-central New Mexico.},
  author={Leigh Plummer and John Karl B{\"o}hlke and Michael W. Doughten},
  journal={Environmental science & technology},
  volume={40 6},
Groundwater from remote parts of the Middle Rio Grande Basin in north-central New Mexico has perchlorate (ClO4-) concentrations of 0.12-1.8 micro/L. Because the water samples are mostly preanthropogenic in age (0-28000 years) and there are no industrial sources in the study area, a natural source of the ClO4- is likely. Most of the samples have Br-, Cl-, and SO4(2-) concentrations that are similar to those of modern bulk atmospheric deposition with evapotranspiration (ET) factors of about 7-40… CONTINUE READING
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