USGS 14207200 TUALATIN RIVER AT OSWEGO DAM, NEAR WEST LINN, OR

PROVISIONAL DATA SUBJECT TO REVISION

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Station operated in cooperation with Clean Water Services.

NOTE: Total chlorophyll data collected at this site use a probe 
that does not respond well to the chlorophyll in blue-green algae. 
When blue-green algae are present, the readings from this probe 
may be biased low.
Available Parameters Available Period
  
2007-10-01  2026-02-20
2007-10-01  2026-02-20
2007-10-01  2026-02-20
2007-10-01  2026-02-20
2007-10-01  2026-02-20
2007-10-01  2026-02-20
2024-05-07  2026-01-05
2007-10-01  2023-11-21
2024-05-07  2026-01-05
2007-10-01  2026-02-20







 (7)
 
  -- or --

 

 
Summary of all available data for this site
Instantaneous-data availability statement

Temperature, water, degrees Celsius
Most recent instantaneous value: 7.1 02-20-2026   12:00 PST
Graph of Temperature, water, degrees Celsius

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Temperature, air, degrees Celsius
Most recent instantaneous value: 7.1 02-20-2026   12:00 PST
Graph of Temperature, air, degrees Celsius

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Barometric pressure, millimeters of mercury
Most recent instantaneous value: 759 02-20-2026   12:00 PST
Graph of Barometric pressure, millimeters of mercury

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Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius
Most recent instantaneous value: 146 02-20-2026   12:00 PST
Graph of Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius

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Dissolved oxygen, water, unfiltered, milligrams per liter
Most recent instantaneous value: 10.6 02-20-2026   12:00 PST
Graph of Dissolved oxygen, water, unfiltered, milligrams per liter

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pH, water, unfiltered, field, standard units
Most recent instantaneous value: 7.3 02-20-2026   12:00 PST
Graph of pH, water, unfiltered, field, standard units

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Chlorophyll relative fluorescence (fChl), water, in situ, relative fluorescence units (RFU)
 
-- Data temporarily unavailable for the time period specified --

Chlorophyll fluorescence (fChl), water, in situ, concentration estimated from reference material, micrograms per liter as chlorophyll
 
-- Data temporarily unavailable for the time period specified --

Phycocyanin relative fluorescence (fPC), water, in situ, relative fluorescence units (RFU)
 
-- Data temporarily unavailable for the time period specified --

Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)
Most recent instantaneous value: 7.3 02-20-2026   12:00 PST
Graph of Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)

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