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Pesticides in Groundwater of the United States: Decadal-Scale Changes, 1993-2011

Overview of attention for article published in Ground Water, March 2014
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About this Attention Score

  • Above-average Attention Score compared to outputs of the same age (59th percentile)
  • High Attention Score compared to outputs of the same age and source (83rd percentile)

Mentioned by

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3 tweeters

Citations

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30 Dimensions

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45 Mendeley
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Title
Pesticides in Groundwater of the United States: Decadal-Scale Changes, 1993-2011
Published in
Ground Water, March 2014
DOI 10.1111/gwat.12176
Pubmed ID
Authors

Patricia L. Toccalino, Robert J. Gilliom, Bruce D. Lindsey, Michael G. Rupert

Abstract

The national occurrence of 83 pesticide compounds in groundwater of the United States and decadal-scale changes in concentrations for 35 compounds were assessed for the 20-year period from 1993-2011. Samples were collected from 1271 wells in 58 nationally distributed well networks. Networks consisted of shallow (mostly monitoring) wells in agricultural and urban land-use areas and deeper (mostly domestic and public supply) wells in major aquifers in mixed land-use areas. Wells were sampled once during 1993-2001 and once during 2002-2011. Pesticides were frequently detected (53% of all samples), but concentrations seldom exceeded human-health benchmarks (1.8% of all samples). The five most frequently detected pesticide compounds-atrazine, deethylatrazine, simazine, metolachlor, and prometon-each had statistically significant (p < 0.1) changes in concentrations between decades in one or more categories of well networks nationally aggregated by land use. For agricultural networks, concentrations of atrazine, metolachlor, and prometon decreased from the first decade to the second decade. For urban networks, deethylatrazine concentrations increased and prometon concentrations decreased. For major aquifers, concentrations of deethylatrazine and simazine increased. The directions of concentration changes for individual well networks generally were consistent with changes determined from nationally aggregated data. Altogether, 36 of the 58 individual well networks had statistically significant changes in concentrations of one or more pesticides between decades, with the majority of changes attributed to the five most frequently detected pesticide compounds. The magnitudes of median decadal-scale concentration changes were small-ranging from -0.09 to 0.03 µg/L-and were 35- to 230,000-fold less than human-health benchmarks.

Twitter Demographics

The data shown below were collected from the profiles of 3 tweeters who shared this research output. Click here to find out more about how the information was compiled.

Mendeley readers

The data shown below were compiled from readership statistics for 45 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 45 100%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 9 20%
Unspecified 7 16%
Student > Master 6 13%
Researcher 6 13%
Student > Doctoral Student 5 11%
Other 12 27%
Readers by discipline Count As %
Unspecified 11 24%
Environmental Science 10 22%
Agricultural and Biological Sciences 10 22%
Chemistry 5 11%
Engineering 4 9%
Other 5 11%

Attention Score in Context

This research output has an Altmetric Attention Score of 2. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 29 September 2014.
All research outputs
#6,802,657
of 12,553,253 outputs
Outputs from Ground Water
#438
of 559 outputs
Outputs of similar age
#73,073
of 188,561 outputs
Outputs of similar age from Ground Water
#1
of 6 outputs
Altmetric has tracked 12,553,253 research outputs across all sources so far. This one is in the 44th percentile – i.e., 44% of other outputs scored the same or lower than it.
So far Altmetric has tracked 559 research outputs from this source. They receive a mean Attention Score of 4.2. This one is in the 21st percentile – i.e., 21% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 188,561 tracked outputs that were published within six weeks on either side of this one in any source. This one has gotten more attention than average, scoring higher than 59% of its contemporaries.
We're also able to compare this research output to 6 others from the same source and published within six weeks on either side of this one. This one has scored higher than all of them