At this time there are 8, 582 animal feeding operations , factory farms, in Iowa that are required to have oversight by Iowa's DNR. That would average out to around 85 per county, so there's likely to be one near you and more construction applications for factory farms are being filed every year.
Iowa's 20 million..."
http://iowacci.org/in-the-news/the-need-for-clean-water/
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