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DESCRIPTION:

Latitude 41°21'05.34",   Longitude 72°23'03.72"   NAD83

Lower Connecticut River Valley Planning Region County, Connecticut, Hydrologic Unit 010802050905

Drainage area: 11,200.0 square miles

Datum of gage: -0.96 feet above   NAVD88.

AVAILABLE DATA:

Data Type	Begin Date	End Date	Count
Current / Historical Observations     (availability statement)	2010-02-20	2025-12-26
Daily Data
Temperature, water, degrees Celsius	2010-02-20	2019-06-04	10161
Temperature, water, degrees Celsius -- at Essex Island Top	2010-02-20	2017-10-31	8412
Temperature, water, degrees Celsius -- at Essex Island Bottom	2010-02-20	2017-10-31	8421
Gage height, feet	2010-02-20	2025-12-25	17271
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius	2011-10-01	2019-06-04	8385
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- at Essex Island Top	2010-02-20	2020-09-29	11535
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- at Essex Island Bottom	2010-02-20	2020-09-29	11604
Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)	2010-02-24	2017-10-31	8040
Salinity, water, unfiltered, practical salinity units at 25 degrees Celsius -- at Essex Island Top	2010-02-20	2025-12-25	14886
Salinity, water, unfiltered, practical salinity units at 25 degrees Celsius -- at Essex Island Bottom	2010-02-20	2025-12-25	14898
Daily Statistics
Temperature, water, degrees Celsius	2010-02-20	2019-06-04	3387
Temperature, water, degrees Celsius -- at Essex Island Top	2010-02-20	2017-10-31	2804
Temperature, water, degrees Celsius -- at Essex Island Bottom	2010-02-20	2017-10-31	2807
Gage height, feet	2010-02-20	2025-08-05	5615
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius	2011-10-01	2019-06-04	2795
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- at Essex Island Top	2010-02-20	2020-09-29	3845
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- at Essex Island Bottom	2010-02-20	2020-09-29	3869
Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)	2010-02-24	2017-10-31	2680
Salinity, water, unfiltered, practical salinity units at 25 degrees Celsius -- at Essex Island Top	2010-02-20	2020-11-04	3875
Salinity, water, unfiltered, practical salinity units at 25 degrees Celsius -- at Essex Island Bottom	2010-02-20	2020-11-04	3901
Monthly Statistics
Temperature, water, degrees Celsius	2010-02	2019-06
Temperature, water, degrees Celsius -- at Essex Island Top	2010-02	2017-10
Temperature, water, degrees Celsius -- at Essex Island Bottom	2010-02	2017-10
Gage height, feet	2010-02	2025-08
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius	2011-10	2019-06
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- at Essex Island Top	2010-02	2020-09
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- at Essex Island Bottom	2010-02	2020-09
Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)	2010-02	2017-10
Salinity, water, unfiltered, practical salinity units at 25 degrees Celsius -- at Essex Island Top	2010-02	2020-11
Salinity, water, unfiltered, practical salinity units at 25 degrees Celsius -- at Essex Island Bottom	2010-02	2020-11
Annual Statistics
Temperature, water, degrees Celsius	2010	2019
Temperature, water, degrees Celsius -- at Essex Island Top	2010	2018
Temperature, water, degrees Celsius -- at Essex Island Bottom	2010	2018
Gage height, feet	2010	2025
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius	2012	2019
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- at Essex Island Top	2010	2020
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- at Essex Island Bottom	2010	2020
Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)	2010	2018
Salinity, water, unfiltered, practical salinity units at 25 degrees Celsius -- at Essex Island Top	2010	2021
Salinity, water, unfiltered, practical salinity units at 25 degrees Celsius -- at Essex Island Bottom	2010	2021
Peak streamflow	2010-03-30	2010-03-30	1
Field/Lab water-quality samples (Legacy QW is frozen as of March 2024, newer data may be found on MLP)	2011-05-13	2023-09-27	195
Water-Year Summary	2010	2024	15
Revisions	Loading...

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