USGS Open-File Report 2008-1156

Prepared in cooperation with the U.S. Environmental Protection Agency National Risk Management Research Laboratory

Microbial and Nutrient Concentration and Load Data During Stormwater Runoff at a Swine Concentrated Animal Feeding Operation in the North Carolina Coastal Plain, 2006-2007

By Stephen L. Harden

U.S. Geological Survey Open-File Report 2008-1156, 22 pages (Published online only, May 2008)

This report is available online only in PDF format: OFR 2008-1156 (Opens the PDF file in a new window. ) (1.25 MB)

Cover thumbnailThis report summarizes water-quality and hydrologic data collected during 2006-2007 to characterize bacteria and nutrient loads associated with overland runoff and subsurface tile drainage in spray fields at a swine concentrated animal feeding operation. Four monitoring locations were established at the Lizzie Research Site in the North Carolina Coastal Plain Physiographic Province for collecting discharge and water-quality data during stormwater-runoff events. Water stage was measured continuously at each monitoring location. A stage-discharge relation was developed for each site and was used to compute instantaneous discharge values for collected samples. Water-quality samples were collected for five storm events during 2006-2007 for analysis of nutrients and fecal indicator bacteria. Instantaneous loads of nitrite plus nitrate, total coliform, Escherichia coli (E. coli), and enterococci were computed for selected times during the five storm events.




Purpose and Scope

Description of Study Area


Data Summary

Stormwater-Runoff Sampling Events

Water Stage and Flow

Microbial and Nutrient Concentrations and Loads


References Cited

Appendix--Summary of nutrient and analytical results for stormwater event samples collected at the Lizzie Research Site, Greene County, North Carolina, 2006-2007

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Suggested citation: Harden, S.L., 2008, Microbial and nutrient concentration and load data during stormwater runoff at a swine concentrated animal feeding operation in the North Carolina Coastal Plain, 2006-2007: U.S. Geological Survey Open-File Report 20081156, 22 p. (only online at

For more information, please contact Stephen L. Harden.

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