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DESCRIPTION:

Latitude 41°17'59.6",   Longitude 88°36'51.1"   NAD83

Lasalle County, Illinois, Hydrologic Unit 07120005

Drainage area: 8,215 square miles

Datum of gage: 462.58 feet above   NAVD88.

AVAILABLE DATA:

Data Type	Begin Date	End Date	Count
Current / Historical Observations     (availability statement)	2012-10-16	2025-04-15
Daily Data
Temperature, water, degrees Celsius	2012-10-16	2025-04-14	13247
Temperature, water, degrees Celsius	2025-04-16	2025-11-12	588
Gage height, feet	2013-07-18	2025-11-17	4415
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius	2013-06-26	2025-04-14	10467
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius	2025-04-16	2025-11-12	528
Dissolved oxygen, water, unfiltered, milligrams per liter	2013-06-27	2025-04-14	10959
Dissolved oxygen, water, unfiltered, milligrams per liter	2025-04-16	2025-11-12	392
pH, water, unfiltered, field, standard units	2013-06-26	2025-04-14	9727
pH, water, unfiltered, field, standard units	2025-04-16	2025-11-12	582
Chlorophyll fluorescence (fChl), water, in situ, concentration estimated from reference material, micrograms per liter as chlorophyll	2022-11-19	2025-04-14	2550
Chlorophyll fluorescence (fChl), water, in situ, concentration estimated from reference material, micrograms per liter as chlorophyll	2025-04-16	2025-11-12	570
Phycocyanin fluorescence (fPC), water, in situ, concentration estimated from reference material, micrograms per liter as phycocyanin	2013-06-26	2025-04-14	10509
Phycocyanin fluorescence (fPC), water, in situ, concentration estimated from reference material, micrograms per liter as phycocyanin	2025-04-16	2025-11-12	570
Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)	2013-06-26	2025-04-14	10530
Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)	2025-04-16	2025-11-12	585
Nitrate plus nitrite, water, in situ, milligrams per liter as nitrogen	2013-07-18	2025-04-14	7165
Nitrate plus nitrite, water, in situ, milligrams per liter as nitrogen	2025-04-16	2025-11-17	561
Daily Statistics
Temperature, water, degrees Celsius	2012-10-16	2025-04-14	4411
Temperature, water, degrees Celsius	2025-04-16	2025-07-22	98
Gage height, feet	2013-07-18	2025-07-22	4314
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius	2013-06-27	2025-04-14	3553
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius	2025-04-16	2025-07-21	88
Dissolved oxygen, water, unfiltered, milligrams per liter	2013-06-27	2025-04-14	3647
Dissolved oxygen, water, unfiltered, milligrams per liter	2025-04-16	2025-07-22	98
Chlorophyll fluorescence (fChl), water, in situ, concentration estimated from reference material, micrograms per liter as chlorophyll	2024-09-04	2025-04-14	215
Phycocyanin fluorescence (fPC), water, in situ, concentration estimated from reference material, micrograms per liter as phycocyanin	2013-06-27	2025-04-14	3454
Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)	2013-06-27	2025-02-26	3461
Nitrate plus nitrite, water, in situ, milligrams per liter as nitrogen	2013-07-18	2025-04-14	3578
Monthly Statistics
Temperature, water, degrees Celsius	2012-10	2025-04
Temperature, water, degrees Celsius	2025-04	2025-07
Gage height, feet	2013-07	2025-07
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius	2013-06	2025-04
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius	2025-04	2025-07
Dissolved oxygen, water, unfiltered, milligrams per liter	2013-06	2025-04
Dissolved oxygen, water, unfiltered, milligrams per liter	2025-04	2025-07
Chlorophyll fluorescence (fChl), water, in situ, concentration estimated from reference material, micrograms per liter as chlorophyll	2024-09	2025-04
Phycocyanin fluorescence (fPC), water, in situ, concentration estimated from reference material, micrograms per liter as phycocyanin	2013-06	2025-04
Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)	2013-06	2025-02
Nitrate plus nitrite, water, in situ, milligrams per liter as nitrogen	2013-07	2025-04
Annual Statistics
Temperature, water, degrees Celsius	2013	2025
Temperature, water, degrees Celsius	2025	2025
Gage height, feet	2013	2025
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius	2013	2025
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius	2025	2025
Dissolved oxygen, water, unfiltered, milligrams per liter	2013	2025
Dissolved oxygen, water, unfiltered, milligrams per liter	2025	2025
Chlorophyll fluorescence (fChl), water, in situ, concentration estimated from reference material, micrograms per liter as chlorophyll	2024	2025
Phycocyanin fluorescence (fPC), water, in situ, concentration estimated from reference material, micrograms per liter as phycocyanin	2013	2025
Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)	2013	2025
Nitrate plus nitrite, water, in situ, milligrams per liter as nitrogen	2013	2025
Field measurements	2022-06-02	2022-06-02	1
Field/Lab water-quality samples (Legacy QW is frozen as of March 2024, newer data may be found on MLP)	1979-04-25	2024-01-31	62
Water-Year Summary	2014	2025	12
Revisions	Loading...

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