Target-chemical concentrations, exposure activity ratios, and bioassay results for assessment of mixed-organic/inorganic chemical exposures in northeast Iowa private-well tapwater, 2018

In the United States and globally, contaminant exposure in unregulated private-well point-of-use (POU) tapwater (TW) is a recognized public health data gap and an obstacle to both risk management and homeowner decision making. To help address the lack of data on broad contaminant exposures in private-well TW from hydrologically vulnerable (alluvial or karst) aquifers in agriculturally intensive landscapes, samples were collected in 2018-2019 from 47 northeast Iowa farms and analyzed for 437 unique organic compounds, 32 inorganic constituents, 5 in vitro bioassays, and 11 microbial assays.

Data and Resources

Field Value
accessLevel public
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identifier http://datainventory.doi.gov/id/dataset/usgs-5fad56aad34eb413d5df459c
metadata_type geospatial
modified 2023-01-17T00:00:00Z
old-spatial -92.2852, 41.5415, -90.0879, 43.6122
publisher U.S. Geological Survey
resource-type Dataset
source_datajson_identifier true
source_hash a306a8df88322ac8f9a8e9ed0509d08df2d06fe9da7ff619264f442ebe638ef8
source_schema_version 1.1
spatial {"type": "Polygon", "coordinates": [[[-92.2852, 41.5415], [-92.2852, 43.6122], [ -90.0879, 43.6122], [ -90.0879, 41.5415], [-92.2852, 41.5415]]]}
theme {geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • AmeriGEO
  • AmeriGEOSS
  • CKAN
  • GEO
  • GEOSS
  • National
  • North America
  • United States
  • biota
  • environmental-health
  • groundwater
  • inorganic-constituents
  • karst-topography
  • microbial-constituents
  • organic-constituents
  • private-well
  • tap-water
  • tapwater
  • usgs-5fad56aad34eb413d5df459c
isopen False
license_id notspecified
license_title License not specified
maintainer Shannon M Meppelink
maintainer_email smeppelink@usgs.gov
metadata_created 2025-09-23T22:23:59.462981
metadata_modified 2025-09-23T22:23:59.462990
notes In the United States and globally, contaminant exposure in unregulated private-well point-of-use (POU) tapwater (TW) is a recognized public health data gap and an obstacle to both risk management and homeowner decision making. To help address the lack of data on broad contaminant exposures in private-well TW from hydrologically vulnerable (alluvial or karst) aquifers in agriculturally intensive landscapes, samples were collected in 2018-2019 from 47 northeast Iowa farms and analyzed for 437 unique organic compounds, 32 inorganic constituents, 5 in vitro bioassays, and 11 microbial assays.
num_resources 2
num_tags 19
title Target-chemical concentrations, exposure activity ratios, and bioassay results for assessment of mixed-organic/inorganic chemical exposures in northeast Iowa private-well tapwater, 2018