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.
6.0 Guidelines for Field-Measured Water-Quality Properties
By F.D. Wilde
This section of Chapter 6 is available as a pdf file:
Download a copy of Adobe Acrobat Reader for free.
This report summarizes information, guidelines, and minimum requirements that apply generally to the seven field-measurement sections that comprise the rest of Chapter A6 of this U.S. Geological Survey (USGS) National Field Manual for the Collection of Water-Quality Data (NFM). Protocols are specified for establishing and maintaining data records, use of field-measurement instruments and methods, and quality assurance of data-collection and reporting methods that are relevant to surface-water and ground-water field-measurement activities.
6.0 - Guidelines for field-measured water-quality properties
6.0.1 Quality assurance
6.0.2 Surface water
6.0.3 Ground water
6.0.4 Selected references
Section 6.0 Archived Versions: