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Status of Eyes on the Bay Chesapeake Bay Program
Data Submittals

Maryland Department of Natural Resources staff collect water quality data for a number of projects throughout Maryland. Data can include site information, water quality vertical profiles, light attenuation, weather conditions, comments, and laboratory analyses of parameters such as chlorophyll, nutrients and sediment. These data are submitted to the Environmental Protection Agency's Chesapeake Bay Program in monthly increments for each project. The table below shows the current status of each project's data collection, review and submission.

It does not include continuous data collected from water quality meters for Continuous Monitoring or Water Quality Mapping (DATAFLOW). Check their respective data pages on Eyes on the Bay for availability.

Current Year Data:

2024 Tidal Network Non-Tidal Network
Month Main Bay Tributary Continuous
Monitoring		 DataFlow BaseFlow StormFlow
January
February
March
April
May
June
July
August
September
October
November
December


Previous Year Data:

2023 Tidal Network Non-Tidal Network
Month Main Bay Tributary Continuous
Monitoring		 DataFlow BaseFlow StormFlow
January
February
March
April
May
June
July
August
September
October
November
December

Legend:
Completed: Sampling & data quality assurance (QA) complete.Data available on CBP DataHub. In process: Sampling or quality assurance (QA) protocol is in process.
Not conducted:
Sampling has not yet been conducted.		 Not collected: Sampling was not conducted either due to weather conditions or off-months.

CBP Data Status:

October 23, 2024 Update:
  • See the tables above for data that have been completed, submitted to the Chesapeake Bay Program (CBP), and a request to the CBP data manager has been made for acceptance and entry of the datasets into the CBP water quality database. There may be a lag period of several days before data are reviewed and posted by CBP. 
  • Continuous monitoring datasets have been completed through June 2024.
  • Dataflow was not conducted in 2024.
  • Tributary datasets have been completed through March 2024.
  • Mainstem datasets have been completed by DNR for 2023. Awaiting QAQC datasets to proceed with 2024 data.
  • The 2023 water year (Oct 2022- September 2023) of Non-tidal Network baseflow and stormflow is complete. 
  • 2023 Coastal Bays data have been completed through 2023
  • Tidal laboratory results (tributary, continuous monitoring, main bay) from the CBL NASL lab have been received through July 2024. 
  • Chlorophyll data from the CBL NASL has been received through August 2024, and processed through June 2024.
  • Keypunched data has been received from MCE through June 2024.
Tidal Network Projects:
Main Bay Long-term Fixed Monthly Monitoring profile sampling at discrete stations from a stationary boat in the Mainstem of the Chesapeake Bay.
Tributary Long-term Fixed Monthly Monitoring profile sampling at discrete stations from a stationary boat or bridge in Chesapeake Bay tributaries.
Continuous Monitoring Deployed in-situ water quality meter, coupled with bi-weekly on-site measurements and sampling (referred to as 'calibration data').
DataFlow Surface mapping program, sampling surface water from a moving boat.
 * More details on the above projects can also be found on our Data Types Overview page.

Non-Tidal Network:
BaseFlow Although called 'Baseflow' these routine samples are taken on a set monthly schedule over a range of flows, not just targeting low flow conditions.
StormFlow Along with Baseflow, Stormflow samples are collected at least once per quarter to account for seasonality, with a target of sampling 8 storms per year.