title: Elevated nitrate levels in relation to bedrock depth, Linn County, Iowa, 1991-1996.
authors.affiliation: Linn County Health Department, Iowa, USA.
authors.forename: M
authors.initials: M
authors.lastname: Ralston
mesh_terms: D006801:Humans; D007484:Iowa; D008377:Maps as Topic; D009566:Nitrates / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014881:Water Supply
chemical_list: D009566:Nitrates; D014874:Water Pollutants, Chemical