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Texas Real-Time Water Quality


NRTWQ Home >> Texas >> Constituents

Constituents Measured or Computed Continuously in Texas

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 Texas. Click on a constituent for more detailed information, including a list of where it is measured or computed.

Constituent Name Units Criteria
Acoustic Doppler Velocity Meter signal to noise ratio Number (num)
Atrazine, wf, ELIZA micrograms per liter (ug/L)
Computed discharge cubic feet per second (cfs)
Dissolved oxygen milligrams per liter (mg/L)
Escherichia coli bacteria most probable number (MPN)
Nitrate plus nitrite, dissolved milligrams per liter as nitrogen (mg/L-N)
pH standard units (std units)
Sediment Corrected Backscatter Decibels (dB)
Specific conductance at 25 degrees Celsius microsiemens per centimeter (uS/cm)
Suspended sediment milligrams per liter (mg/L)
Suspended sediment concentration, water, unfiltered, estimated by regression equation milligrams per liter (mg/L)
Total organic carbon milligrams per liter (mg/L)
Total phosphorus milligrams per liter as phosphorus (mg/L-P)
Turbidity, measured as NTU or FNU formazin nephelometric units (FNU)
Water temperature degrees Celsius (°C)