Nitrate concentrations of ground water increasing in many areas of the Uni...(ove the USEPA maximum contaminant level ...)

Date:9/17/2008

ove the USEPA maximum contaminant level of 10 parts per million. Concentrations decreased in one network located in the Willamette Valley of Oregon. The study included estimates of the age of the ground water (that is, time since the water recharged to the aquifer); nitrate concentrations in ground water increased in response to the increased use of fertilizers since World War II.

"This study highlights the importance of maintaining long-term ground-water monitoring programs in the nation, because sustained monitoring provides critical information on changes of our nation's ground-water quality, and whether pollution prevention programs are effective in protecting this nation's ground water," said Michael Rupert, a hydrologist with the USGS.

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Contact: Sara Uttech suttech@agronomy.org 608-268-4948 American Society of Agronomy Source:Eurekalert

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