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USGS scientists deploy SPMD and POCIS samplers to collect waterborne contaminants in Manoa Stream on Oahu, Hawaii.


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National Field Manual for the Collection of Water-Quality Data (TWRI Book 9)

Chapter A6. Field Measurements


The National Field Manual for the Collection of Water-Quality Data provides protocols, standard procedures, and guidance for U.S. Geological Survey (USGS) personnel who collect data used to assess the quality of the Nation's surface-water and groundwater resources. Chapter A6 presents general information and guidelines for performing field measurements (section 6.0) and specific requirements and guidance for collecting data for water temperature (section 6.1), dissolved oxygen concentrations (section 6.2), specific electrical conductance (section 6.3), pH (section 6.4), reduction-oxidation potential (section 6.5), alkalinity (section 6.6), turbidity (section 6.7), and for the use of multiparameter instruments in making such measurements (section 6.8). Each of these sections is revised periodically and published separately on this Web site.

Sections of Chapter A6:

Cover pages, Table of Contents, Abstract and Introduction (Version 1.1, 10/2008)

6.0 Guidelines for field-measured water-quality properties (Version 2.0, 10/2008)
F.D. Wilde

6.1 Temperature (Version 2.0, 3/2006)
Revised by F.D. Wilde

6.2 Dissolved oxygen (Version 3.0, 9/2013)
Revised by Stewart A. Rounds, Franceska D. Wilde, and George F. Ritz

6.3 Specific electrical conductance (Version 1.2, 8/2005)
D.B. Radtke, J.V. Davis, and F.D. Wilde

6.4 pH (Version 2.0, 10/2008)
Revised By G.F. Ritz and J.A. Collins

6.5 Reduction-oxidation potential (electrode method) (Version 1.2, 9/2005)
D.K. Nordstrom and F.D. Wilde

6.6 Alkalinity and acid neutralizing capacity (Version 4, 9/2012)
Revised by S.A. Rounds

6.7 Turbidity (Version 2.1, 9/2005)
Chauncey W. Anderson

6.8 Use of multiparameter instruments for routine field measurements (Version 1.1, 8/2007)
Jacob Gibs, Franceska D. Wilde, and Heather A. Heckathorn

Conversion factors, selected terms and symbols, chemical symbols and formulas, and other abbreviations

Selected references, selected documents, and publications on Techniques of Water- Resources Investigations

 [Back] Return to Field Manual Table of Contents


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Submit a question or comment related to this National Field Manual. For general water-quality questions, contact the USGS Office of Water Quality.

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