USGS 011008745 MERRIMACK R ESTUARY US OF SHAD CRK, SALISBURY, MA

PROVISIONAL DATA SUBJECT TO REVISION

This station managed by the Northborough MA Field Office.

Available Parameters Available Period
  
2021-06-15  2026-04-25
2021-06-15  2026-05-18
2021-06-15  2026-04-25
2021-06-15  2026-05-18
2021-06-15  2026-04-25
2021-06-15  2026-05-18
2021-06-18  2025-11-14
2021-06-18  2025-11-14
2021-06-15  2026-04-25
2021-06-15  2026-05-18
2022-05-24  2024-10-25
2022-05-15  2024-10-25
2023-05-24  2024-10-25
2022-11-04  2024-10-25
2021-06-15  2024-10-25
2021-06-15  2024-10-25
2021-06-15  2026-04-25
2021-06-15  2026-05-18







 (7)
 
  -- or --

 

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

Temperature, water, degrees Celsius, BOTTOM
Most recent instantaneous value: 11.2 05-19-2026   00:00 EDT
Graph of Temperature, water, degrees Celsius

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Temperature, water, degrees Celsius, TOP
 
-- Data temporarily unavailable for the time period specified --

Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius, BOTTOM
Most recent instantaneous value: 45900 05-19-2026   00:00 EDT
Graph of Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius

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Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius, TOP
 
-- Data temporarily unavailable for the time period specified --

Dissolved oxygen, water, unfiltered, milligrams per liter, BOTTOM
Most recent instantaneous value: 10.5 05-19-2026   00:00 EDT
Graph of Dissolved oxygen, water, unfiltered, milligrams per liter

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Dissolved oxygen, water, unfiltered, milligrams per liter, TOP
 
-- Data temporarily unavailable for the time period specified --

Dissolved oxygen, water, unfiltered, percent of saturation, BOTTOM
 
-- Data temporarily unavailable for the time period specified --

Dissolved oxygen, water, unfiltered, percent of saturation, TOP
 
-- Data temporarily unavailable for the time period specified --

pH, water, unfiltered, field, standard units, BOTTOM
Most recent instantaneous value: 8.1 05-19-2026   00:00 EDT
Graph of pH, water, unfiltered, field, standard units

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pH, water, unfiltered, field, standard units, TOP
 
-- Data temporarily unavailable for the time period specified --

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

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

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

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

Salinity, water, unfiltered, practical salinity units at 25 degrees Celsius, BOTTOM
Most recent instantaneous value: 30 05-19-2026   00:00 EDT
Graph of Salinity, water, unfiltered, practical salinity units at 25 degrees Celsius

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Salinity, water, unfiltered, practical salinity units at 25 degrees Celsius, TOP
 
-- Data temporarily unavailable for the time period specified --