Boating safety tips are available from the U.S. Coast Guard.

NOTE: During cold periods, gage height and streamflow information may be adversely affected by ice.

USGS 05587498 Mississippi River Pool Lock and Dam 26 at Alton,IL

PROVISIONAL DATA SUBJECT TO REVISION

Click to hidestation-specific text

Logo for USACE Station operated in cooperation with the  U.S. Army Corps of Engineers—St. Louis District



This station managed by the Olivette Field Office.

Available Parameters Available Period
  
2024-08-08  2025-07-04
2007-10-01  2025-07-04
2024-08-08  2025-07-04
2024-08-08  2025-07-04
2024-08-08  2025-07-04
2024-08-08  2025-07-04
2024-08-08  2025-07-04







 (7)
 
  -- or --

 

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

Temperature, water, degrees Celsius
Most recent instantaneous value: 29.9 07-04-2025   17:00 CDT
Graph of Temperature, water, degrees Celsius

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Gage height, feet
Most recent instantaneous value: 15.98 07-04-2025   17:00 CDT
Graph of Gage height, feet

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Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius
Most recent instantaneous value: 482 07-04-2025   17:00 CDT
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Dissolved oxygen, water, unfiltered, milligrams per liter
Most recent instantaneous value: 7.1 07-04-2025   17:00 CDT
Graph of Dissolved oxygen, water, unfiltered, milligrams per liter

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pH, water, unfiltered, field, standard units
Most recent instantaneous value: 8.1 07-04-2025   17:00 CDT
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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: 26.7 07-04-2025   17:00 CDT
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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Nitrate plus nitrite, water, in situ, milligrams per liter as nitrogen
Most recent instantaneous value: 6.0 07-04-2025   17:00 CDT
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