National field manual for the collection of water-quality data

http://water.usgs.gov/owq/FieldManual/

Field manual (also available in PDF and paper formats) with instructions on techniques to collect and process water samples and to perform measurements of temperature, oxygen content, conductance, pH, turbidity, and fecal contaminants.

by Office of Water Quality (Sponsor)

U.S. Geological Survey Techniques of Water-Resources Investigations 09