Exposure to Agricultural Herbicides in Iowa Homes
Author Information
Author(s): Ward Mary H., Lubin Jay, Giglierano James, Colt Joanne S., Wolter Calvin, Bekiroglu Nural, Camann David, Hartge Patricia, Nuckols John R.
Primary Institution: National Cancer Institute, National Institutes of Health
Hypothesis
Are crop maps useful for predicting levels of crop herbicides in residential dust samples?
Conclusion
The study found that homes near corn and soybean fields had higher levels of agricultural herbicides in dust samples.
Supporting Evidence
- Detection rates for herbicides ranged from 0% for metribuzin and cyanazine to 95% for 2,4-D.
- Six herbicides used almost exclusively in agriculture were detected in 28% of homes.
- Homes with an active farmer had the highest detections of agricultural herbicides.
- Increasing acreage of corn and soybean fields within 750 m of homes was associated with significantly elevated odds of detecting agricultural herbicides.
- Seventy-five percent of homes with > 300 acres of crops within 750 m had detections of agricultural herbicides.
Takeaway
If you live close to farms, you might find more pesticides in your home dust because they can drift from the fields.
Methodology
The study collected vacuum cleaner dust samples from homes and measured 14 herbicides using gas chromatography/mass spectrometry.
Potential Biases
Self-reported proximity to crops may introduce misclassification bias.
Limitations
The study only included homes within a specific geographic area and may not represent all agricultural regions.
Participant Demographics
Participants included cases and controls from a case-control study of non-Hodgkin lymphoma in Iowa.
Statistical Information
P-Value
1.06
Confidence Interval
1.02–1.11
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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