Arcata Fish and Wildlife Office
Pacific Southwest Region
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Klamath River Water Quality Monitoring

About the Klamath River Water Quality Monitoring Program

The Arcata Fish and Wildlife Office (AFWO) conducted comprehensive water quality investigations in the Klamath River Basin from 2001 to 2006. The over-arching purpose of these water quality investigations are to acquire an understanding of the temporal and spatial variations in water quality below Iron Gate dam and to better understand the severity of water quality impairments relative to fish habitat, fish health, and flow management in the river.

Klamath River Water Quality

Continuous Monitor Data (Sonde data) and Nutrients: Analytical Work Products

The investigations included collection of continuous data using multi-probe monitors (also referred to as Sondes) that recorded water temperature, dissolved oxygen, pH, and specific conductance, and collection of water samples to determine nutrient concentrations. Both types of sampling occurred from June through October, although sampling outside of these months occurred in some years. Continuous monitors collected in situ measurements at 30-minute intervals and water samples were taken for nutrient evaluations at biweekly or monthly intervals. Sampling occurred at stations along the mainstem Klamath River and significant tributaries. Monitoring efforts were coordinated annually with other federal, state, and tribal cooperators and followed established protocols.


Klamath River Basin Water Temperature Logger Data

In addition to continuous sonde monitoring and nutrient grab samples, independent water temperature loggers were, and continue to be placed at numerous locations throughout the lower Klamath Basin.  Loggers are deployed year-round and data downloaded twice a year.   Data from these loggers continue to be useful in temperature modeling and serve as complimentary data for environmental evaluations such as the many fishery investigations that occur in the basin.

Klamath River Links:



Last updated: April 16, 2015