The State-Wide Rural Well-Water Survey was conducted between April 1988 and June 1989.
About 18% of Iowa's private, rural drinking-water wells contain nitrate above the recommended health advisory level (levels of NO3-N greater than 10 mg/L); 37% of the wells have levels greater than 3 mg/L, typically considered indicative of anthropogenic pollution.
Thirty-five percent of well less than 15 m deep exceed the health advisory level, and the mean concentration of nitrate-nitrogen for these wells exceeds 10 mg/L.
Mots-clés Pascal : Puits, Nitrate, Milieu rural, Eau potable, Contamination, Analyse chimique, Teneur eau, Iowa, Etats Unis, Amérique du Nord, Amérique, Hygiène
Mots-clés Pascal anglais : Well, Nitrates, Rural environment, Drinking water, Contamination, Chemical analysis, Water content, Iowa, United States, North America, America, Hygiene
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 93-0269486
Code Inist : 002B30A02A. Création : 199406.