USGS Water-Quality Information
USGS personnel collect a water-quality sample on the Missouri River. USGS/Photo by Kelly Brady.
Water Quality Data
National Water Information System (NWIS)
NWIS provides current and historical water-quality data.
Today's Water Conditions
Water-Quality Watch provides continuous real-time water-quality measurements.
Water-Quality Web Services
Web services automate the sharing of USGS and USEPA water-quality monitoring data.
For More Data
Additional water-quality data resources are available.
USGS in Your Area
USGS Water Science Centers are located in each state.
Revised by Susan L. Lane, Sarah Flanagan, and Franceska D. Wilde
Chapter A2, Version 2.0: To print this file, select Print from the File Menu, and select Document and Markups under the Comments and Forms Heading.) Information in the Comment boxes will be displayed when the file is printed.
This report is in pdf format. Download a copy of Adobe Acrobat Reader for free.
The National Field Manual for the Collection of Water-Quality Data (National Field Manual) describes protocols and provides guidelines for U.S. Geological Survey (USGS) personnel who collect data used to assess the quality of the Nation's surface-water and ground-water resources. This chapter of the manual addresses the selection of equipment commonly used by USGS personnel to collect and process water-quality samples.
Sections of Chapter A2:
Purpose and scope
Requirements and recommendations
Field manual review and revision
2.0. Chemical compatibility with the water sample
2.0.1. Equipment materials
2.0.2. Disposable gloves
2.0.3. Blank water and chemical reagents
2.1. Sample collection
2.1.1. Surface-water equipment
2.1.1.A. Isokinetic depth-integrating samplers
2.1.1.B. Nonisokinetic samplers
Automatic samplers and pumps
2.1.1.C. Support equipment
2.1.2. Ground-water equipment
2.1.2.B. Bailers, thief samplers, and passive diffusion bag samplers
Bailers and thief samplers
Passive diffusion bag samplers
2.1.2.C. Support equipment
2.2. Sample processing
2.2.1. Sample splitters
2.2.1.A. Churn splitter
2.2.1.B. Cone splitter
2.2.2. Processing and preservation chambers
2.2.3. Filtration systems
2.2.3.A. Inorganic constituents
Disposable capsule filter
2.2.3.B. Organic compounds
2.2.4. Pump tubing
2.3. Field vehicles
2.4. Lists of equipment and supplies
Conversion factors, selected terms, and abbreviations
Selected references and technical memorandums
Appendix: Construction of a collapsible sample-processing/preservation chamber
For more information
Chapter A2 Archives