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Continuous Monitoring Data

Continuous Monitoring at National Aquarium in Baltimore

The continuous monitoring program uses instruments called water quality sondes to collect data every 15 minutes. Sondes are deployed within a PVC tube, where most record data 1-meter below the surface, while others are a fixed 0.3-meters off the bottom. Parameters collected include dissolved oxygen, turbidity, chlorophyll, water temperature, salinity and pH. Water quality profiles and additional samples are taken every two weeks when sites are visited for instrument exchanges and calibrations. Data are used to assess water quality criteria, determine impacts from episodic events, investigate long-term trends, guide and determine the success of management and restoration efforts, refine water quality models, and extend scientific understanding.

This timeline of sampling longevity at each site may be useful for choosing stations for your queries.

Don't forget to also visit our Continuous Monitoring Charts page where you can build your own charts based on a station, parameter, and date range of your choosing.


Continuous Monitoring Quality Assured Data:
(2001 - 2016)

Archived "Quality Assured" continuous monitoring data have been through rigorous Quality Assurance and Quality Control.

  • Select Stations, Parameters, and a Date Range,
    Choose to output data as Raw Data or Summary Data
    Then "Submit Data Query"
    Select Stations (years sampled included for reference):
    Press the Ctrl-key to Select Multiple Stations
    Select Parameter(s):


    Data output as Raw Data or Summary Data?
    (Mouseover each option for more information)
        Summary Data By Year
        Summary Data By Month & Year
        Raw Data Download*

    *At this time please limit your raw data request to one station at a time due to server constraints. Check your 'Downloads' folder for downloaded .csv file.

    If you require larger datasets please fill out our Data Request form.
    Temperature
    Salinity
    Dissolved Oxygen    (mg/L)
    Dissolved Oxygen
       (% Saturation)
    pH
    Turbidity
    Chlorophyll
    Depth (raw data only)

    Enter Date Range:
       Start Date
    (after 05/01/2001):


       End Date
    (before 12/31/2016):


    Large queries may take a while, please be patient while your data are retrieved.
    Check your 'Downloads' location for downloaded .csv file.

     



Continuous Monitoring Provisional Data:
(end of 2016 - 2017)

Data from the current year and the last few months of the previous year are provisional and have not yet been through our Quality Assurance and Quality Control methods.

  • Select Stations, Parameters, and a Date Range,
    Choose to output data as Raw Data or Summary Data
    Then "Submit Data Query"
    Select Stations (note: this is provisional data):
    Press the Ctrl-key to Select Multiple Stations
    Select Parameter(s):


    Data output as Raw Data or Summary Data?
    (Mouseover each option for more information)
        Summary Data By Year
        Summary Data By Month & Year
        Raw Data Download*

    *At this time please limit your raw data request to one station at a time due to server constraints. Check your 'Downloads' folder for downloaded .csv file. If you require larger datasets please fill out our Data Request form.
    Temperature
    Salinity
    Dissolved Oxygen    (mg/L)
    Dissolved Oxygen
       (% Saturation)
    pH
    Turbidity
    Chlorophyll
    BGA (RFU)
    Depth (raw data only)

    Enter Date Range:
       Start Date
    (after 04/06/16 ):


       End Date
    (before 04/28/17):


    Large queries may take a while, please be patient while your data are retrieved.
    Check your 'Downloads' location for downloaded .csv file.

    *Data available from this query are provisional, and have not yet been quality assured *

     



Chesapeake Bay Program Data Hub:

Quality assured water quality data collected by Eyes on the Bay biweekly cruises are available for download from the EPA Chesapeake Bay Program's Data Hub.
Note that the data available on the Data Hub are not the 15 min increment data, which are available in the above data query features.

  • Click the link below to download water quality data from the EPA Chesapeake Bay Program Data Hub:CHESAPEAKE BAY PROGRAM DATA HUB
  • Below we have provided a step-by-step guide to help you with the process of downloading data from Chesapeake Bay Program's Data Hub: STEP-BY-STEP DOWNLOAD GUIDE