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Colorado Real-time Water Quality Surrogates


NRTWQ Home >> Colorado >> Constituents

Constituents Measured or Computed Continuously in Colorado

Continuous measurements of constituents (water-quality parameters) can be obtained by direct measurement using sensors, or by indirect computation using models.

Below is a list of constituents continuously measured or computed by the USGS in Colorado. Click on a constituent for more detailed information, including a list of where it is measured or computed.

Constituent Name Units Criteria
Computed discharge cubic feet per second (cfs)
Dissolved solids milligrams per liter (mg/L)
Load dissolved solids tons per day (tons/day)
pH standard units (std units)
Selenium, water, filtered, micrograms per liter micrograms per liter (ug/l)
Specific conductance at 25 degrees Celsius microsiemens per centimeter (uS/cm)
Water temperature degrees Celsius (°C)