The nitrate contamination of private well water in Iowa.

Abstract:

: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 wells less than 15 m deep exceed the health advisory level, and the mean concentration of nitrate-nitrogen for these wells exceeds 10 mg/L. Depth of well is the best predictor of well-water contamination. Individually, NO3-N levels of more than 10 mg/L occurred alone in about 4% of the private wells statewide; pesticides were present alone in about 5%. Total coliform positives occurred alone at 27% of the sites. In a cumulative sense, these three contaminants were detected in nearly 55% of rural private water supplies.

journal_name

Am J Public Health

authors

Kross BC,Hallberg GR,Bruner DR,Cherryholmes K,Johnson JK

doi

10.2105/ajph.83.2.270

subject

Has Abstract

pub_date

1993-02-01 00:00:00

pages

270-2

issue

2

eissn

0090-0036

issn

1541-0048

journal_volume

83

pub_type

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