Water Resources--Office of Water Quality

National Field Manual

7.0 FIVE-DAY BIOCHEMICAL OXYGEN DEMAND

By G.C. Delzer and S.W. McKenzie

This section of Chapter 7 is available as a pdf file (360 KB):
Five-Day Biochemical Oxygen Demand (11/2003)

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Abstract

The presence of a sufficient concentration of dissolved oxygen is critical to maintaining the aquatic life and aesthetic quality of streams and lakes. Determinng how organic matter affects the concentration of dissolved oxygen (DO) in a stream or lake is integral to water-quality management. The decay of organic matter in water is measured as biochemical or chemical oxygen demand. This report describes the field protocols used by U.S. Geological Survey (USGS) personnel to determine the five-day test for biochemical oxygen demand.

Contents

7.0 - Five-day biochemical oxygen demand

7.0.1 - Equipment and supplies
7.0.2 - Sample collection and storage
7.0.3 - Five-day test for biochemical oxygen demand
7.0.4 - Calculations
7.0.5 - Troubleshooting
7.0.6 - Reporting

Comments/Errata page

Citation for Section 7.0:
Delzer, G.C., and McKenzie, S.W., November 2003, Five-day biochemical oxygen demand: U.S. Geological Survey Techniques of Water-Resources Investigations, book 9, chap. A7, section 7.0, accessed __list date__, from http://pubs.water.usgs.gov/twri9A/.

Chapter A7, Biological Indicators
Field Manual Complete Contents

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Last Modified: 28 Dec. 07
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