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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
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::60fe3e7f391a487fc8e5829caf6e4757
https://europepmc.org/articles/PMC1694569/
https://europepmc.org/articles/PMC1694569/
