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Eyes on the Bay Home

Thank you for visiting Eyes on the Bay, your home for Maryland tidal water quality data and information. We hope that our data search and download pages will be useful tools. The map below displays all the stations where we collect water quality data, as well as partner stations.

  • Filter Stations: check/uncheck the boxes for each water quality data type to turn data points on/off
  • Change Year: use this dropdown to view what stations were sampled in different years
  • Show Legend: mouseover this menu to display the legend for the station markers
  • Station markers: click to view station details, and link to data and charts
  • Zoom/Pan: zoom in & out using your mouse scroll button; click & drag to move the map around (mobile: pinch to zoom, touch & drag to move map)

For full-screen map view click here
For full functionality we suggest using Google Chrome or Mozilla Firefox.
Show Legend
Station Legend
Long-Term Fixed Station
Dataflow / Water Quality Mapping Segment
Continuous Monitoring Station with Real-time Telemetry
Continuous Monitoring Station without Telemetry
purple dot Vertical Profiler Continuous Monitoring Station
Continuous Monitoring Station not Currently Active
Partner Sites
National Data Buoy Center or NOAA buoys
Tide Prediction Sites
(Click for current weather/water conditions)
More info on:
"Our Monitoring Explained"
Change Year
Select Another Year
for Map Display:
Filter Stations

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       Eyes on the Bay Water Quality Data:

Installation of a continuous monitoring sonde at National Aquarium in Baltimore

Continuous Monitoring

Water quality data measured every 15 minutes at sites around Maryland since 2001.
Spatial Water Quality Data Map

Surface Mapping

High frequency spatial data collected monthly in Maryland bays and rivers.
Research vessel Kerhin

Long-term Monitoring

Tidal and non-tidal data collected monthly since 1985 throughout Maryland.
R/V Kerhin leaving Solomons

       Eyes on the Bay 'Data Bytes':

July 27, 2023

Status and Trends Data and Maps Updated Through 2022

March 28, 2023

 Follow the Maryland Water Monitoring Council's Facebook page for information on their annual conference, job opportunities and more.

August 9, 2022

 Hypoxia Reporting has begun for 2022

Visit the Maryland DNR hypoxia report page to find out the latest dissolved oxygen conditions for the Chesapeake Bay.

March 23, 2022


Website Maintenance

During the week of April 4, the website might be inaccessible for short periods of time.
Thank you for your patience as we look to improve Eyes on the Bay.

   View Data Bytes Archive >>