Fact sheet discusses nonpoint source pollution analysis

A fact sheet titled 'Linear Regression for Nonpoint Source Pollution Analyses' is now available from the National Small Flows Clearinghouse (NSFC).

MORGANTOWN, WV, Sept. 4, 2001 — A fact sheet titled "Linear Regression for Nonpoint Source Pollution Analyses" is now available from the National Small Flows Clearinghouse (NSFC).

This fact sheet is targeted toward people in state water quality monitoring agencies who are responsible for nonpoint source assessments and implementating watershed management. Developed by the U.S. Environmental Protection Agency Office of Water, the fact sheet demonstrates an approach for describing the relationship between variables using regression for nonpoint source pollution analyses.

In nonpoint source analyses, linear regression is often used to determine the extent to which the value of a water quality variable is influenced by land use or hydrologic factors such as crop type, soil type, percentage of land treatment, rainfall, or stream flow. Practical applications of these regression results include the ability to predict the water quality impacts due to changes in the independent variables.

This eight-page fact sheet can serve as a resource for engineers, state regulatory agencies, state officials, and public health officials. It is free, but shipping charges still apply. To order, call the NSFC at (800) 624-8301 or (304) 293-4191, and request Item #WWBLRE30. You also may e-mail nsfc_orders@mail.nesc.wvu.edu.

Funded by the EPA, the NSFC helps small communities find affordable sewage treatment options to protect public health and the environment. Located at West Virginia University, the NSFC is a nonprofit organization established in 1979 under an amendment to the 1977 Clean Water Act. Since that time, the NSFC has become a respected national source of information about "small flows" technologies-those systems that have fewer than one million gallons of wastewater flowing through them per day, ranging from individual septic systems to small sewage treatment plants.

Anyone who works with small communities to help solve wastewater treatment problems can benefit from the NSFC's services, which include more than 450 free and low-cost educational products, a toll-free technical assistance hotline, five computer databases, two free publications, and an online discussion group. For more information, visit NSFC's Web site at http://www.nsfc.wvu.edu.

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