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October Newsletter

Manure Nutrients

The US Geological Survey (USGS) published nine articles on national and regional investigations into ground-water quality in the September/October issue of the Journal of Environmental Quality (JEQ). These investigations focus primarily on nitrate, pesticides, and pesticide degradates.

This is the first series of several planned trends studies being conducted as part of the National Water Quality Assessment (NAWQA) program, which seeks to collect consistent and comparable data across the national. NAWQA, started in 1991 integrates water chemical data with spatial features--land use, aquifer type, soils--that may affect transport and fate of chemicals in ground water.

What General Trends in Water Quality Have Been Observed?

These articles highlight trends over the last 10-15 years. Nitrate concentrations have been increasing (generally) in contrast to an overall decreasing trend in agricultural pesticides, such as atrazine.

Accessing the Reports

The papers can be accessed at Journal of Environmental Quality Volume 37 and scrolling down to the overview by Rosen and Lapham in "Special Submissions".

• Michael R. Rosen and Wayne W. Lapham Introduction to the U.S. Geological Survey National Water-Quality Assessment (NAWQA) of Ground-Water Quality Trends and Comparison to Other National Programs Abstract
• Michael R. Rosen, Frank D. Voss, and Jorge A. Arufe Evaluation of Intra-annual Variation in U.S. Geological Survey National Water Quality Assessment Ground Water Quality Data Abstract
• David A. Saad Agriculture-Related Trends in Groundwater Quality of the Glacial Deposits Aquifer, Central Wisconsin Abstract
• Laura M. Bexfield Decadal-Scale Changes of Pesticides in Ground Water of the United States, 1993–2003 Abstract
• Michael G. Rupert Decadal-Scale Changes of Nitrate in Ground Water of the United States, 1988–2004 Abstract
• Karen R. Burow, Jennifer L. Shelton, and Neil M. Dubrovsky Regional Nitrate and Pesticide Trends in Ground Water in the Eastern San Joaquin Valley, California Abstract
• Melinda S. Dalton and Elizabeth A. Frick Fate and Transport of Pesticides in the Ground Water Systems of Southwest Georgia, 1993–2005 Abstract
• Lonna Frans Trends of Pesticides and Nitrate in Ground Water of the Central Columbia Plateau, Washington, 1993–2003 Abstract
• Suzanne S. Paschke, Keelin R. Schaffrath, and Shana L. Mashburn Near-Decadal Changes in Nitrate and Pesticide Concentrations in the South Platte River Alluvial Aquifer, 1993–2004 Abstract
• Linda M. Debrewer, Scott W. Ator, and Judith M. Denver Temporal Trends in Nitrate and Selected Pesticides in Mid-Atlantic Ground Water Abstract

October, 2008 Newsletter Articles

• EPA Releases "Report on the Environment 2008"
• Orienting Buildings Perpendicular to Prevailing Winds May Reduce Odors
• Poultry Waste Management Symposium To Be Held October 21-23
• US Geological Survey National and Regional Trends in Ground-Water Quality