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 F.D. Wilde
This section of Chapter 6 is available as a pdf file:
Download a copy of Adobe Acrobat Reader for free.
Accurate temperature measurements are required for accurate determinations of important environmental parameters such as pH, specific electrical conductance, and dissolved oxygen, and to the determination of chemical reaction rates and equilibria, biological activity, and physical fluid properties. This section of the National Field Manual (NFM) describes U.S. Geological Survey (USGS) guidance and protocols for measurement of temperature in air, ground water, and surface water and calibration of the equipment used.
6.1.1 - Equipment and supplies
6.1.1.A - Maintenance, cleaning, and storage
6.1.2 - Calibration
6.1.2.A - Calibration thermometers
6.1.2.B - Field thermometers
6.1.3 - Measurement
6.1.3.A - Air
6.1.3.B - Surface water
6.1.3.C - Ground water
6.1.4 - Troubleshooting
6.1.5 - Reporting
Section 6.1 Archived Versions: