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Open-File Report 2010–1071

Prepared in cooperation with the Charles County Government
and the Port Tobacco River Conservancy, Inc.

Summary of Organic Wastewater Compounds and Other Water-Quality Data in Charles County, Maryland, October 2007 through August 2008

By Michelle M. Lorah, Daniel J. Soeder,1 and Jessica A. Teunis

1U.S. Department of Energy, formerly of the U.S. Geological Survey
Thumbnail of front cover and link to report (1.46 MB)


The U.S. Geological Survey, in cooperation with the government of Charles County, Maryland, and the Port Tobacco River Conservancy, Inc., conducted a water-quality reconnaissance and sampling investigation of the Port Tobacco River and Nanjemoy Creek watersheds in Charles County during October 2007 and June–August 2008. Samples were collected and analyzed for major ions, nutrients, organic wastewater compounds, and other selected constituents from 17 surface-water sites and 11 well sites (5 of which were screened in streambed sediments to obtain porewater samples). Most of the surface-water sites were relatively widely spaced throughout the Port Tobacco River and Nanjemoy Creek watersheds, although the well sites and some associated surface-water sites were concentrated in one residential community along the Port Tobacco River that has domestic septic systems. Sampling for enterococci bacteria was conducted by the Port Tobacco River Conservancy, Inc., at each site to coordinate with the sampling for chemical constituents. The purpose of the coordinated sampling was to determine correlations between historically high, in-stream bacteria counts and human wastewater inputs. Chemical data for the groundwater, porewater, and surface-water samples are presented in this report.

First posted April 30, 2010

For additional information contact:
Michelle Lorah
U.S. Geological Survey
5522 Research Park Drive
Baltimore, MD 21228

Part or all of this report is presented in Portable Document Format (PDF); the latest version of Adobe Reader or similar software is required to view it. Download the latest version of Acrobat® Reader, free of charge.

Suggested citation:
Lorah, M.M., Soeder, D.J., and Teunis, J.A., 2010, Summary of organic wastewater compounds and other water-quality data in Charles County, Maryland, October 2007 through August 2008: U.S. Geological Survey Open-File Report 2010–1071, 19 p., plus appendixes. (Available at




Previous Investigations

Purpose and Scope

Description of Study Area

Methods of Investigation

Sampling Network

Sample Collection and Analysis

Quality Control

Water-Quality Data

Field Parameters and Major and Minor Inorganic Constituents

Nutrients and Organic Carbon

Organic Wastewater Compounds



References Cited

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