September 10, 2026

Chesapeake Monitoring Cooperative Celebrates 10 Years: Over 100 Organizations Contribute 1 Million Data Points To Support Restoration

Today, the Chesapeake Monitoring Cooperative (CMC)  kicks off its 10 year anniversary celebrations. Over the past 10 years, the CMC has partnered with over  100 organizations who are collecting water quality and benthic macroinvertebrate samples at 2,490  monitoring stations throughout the Chesapeake Bay Watershed. 

“The Alliance is honored to lead the CMC project and work with so many of our community volunteers  and partners over the years,” said Liz Chudoba, Water Quality Monitoring Initiative Director, Alliance  for the Chesapeake Bay. “The collective impact of our efforts informs decision-making policies and  supports communities across the watershed.”  

Formed in 2015, the CMC began as a six-year cooperative agreement through the US Environmental  Protection Agency’s Chesapeake Bay Program, to integrate community and volunteer monitoring data  into the Chesapeake Bay Program partnership. The CMC team was awarded a second cooperative  agreement in 2021, continuing the partnership for an additional six years. 

The CMC is supported by five partner organizations: the Alliance for the Chesapeake Bay, the Izaak  Walton League of America, the Alliance for Aquatic Resource Monitoring at Dickinson College, the  University of Maryland Center for Environmental Science, and the Chesapeake Bay National Estuarine  Research Reserve in Virginia at Virginia Institute of Marine Science. These organizations provide  technical services to monitoring groups in the Chesapeake Bay region in order to ensure data are of  known quality. 

“The CMC has allowed the Chesapeake Bay Program to expand its knowledge base and better  understand conditions throughout the watershed through broader engagement with the public,” said  Dr. Peter Tango, Chesapeake Bay Monitoring Coordinator, USGS at the Chesapeake Bay Program  Office. “This supports management of our ecosystems by working across local to regional scales to meet  state and federal goals for water quality improvements.”

Historically, there were many sources of data, including data collected by volunteers, local governments,  and NGO’s, that were not being used to track Chesapeake Bay and Watershed health at a broader scale.  To address this issue, the CMC team established a quality assurance structure that aligns with state and  federal regulatory decision-making processes and enables all data of known quality to be used together  across the region. This structure not only helps existing groups, but also breaks down the barriers and  enables more monitoring groups to become established in the watershed. To date, over 1.1 million data  points have been uploaded to and are publicly accessible on the CMC Data Explorer

“The CMC Data Explorer has been a game changer for sharing data,” said Mary Claire King, Citizen  Science Coordinator at Buttonwood Nature Center, who organizes a volunteer water monitoring  program in partnership with the Antietam Watershed Association. “Our monitoring program includes  28 testing sites, many of which are located on private property. The data explorer allows the landowners  a chance to connect with the data collected from their property in real time. It also provides incredible  graphs and visuals that we at Buttonwood and AWA use when working with the public to educate on the  importance of keeping our local waterways clean. It is such a useful resource for our organizations and is  very easy to use!” 

Community volunteers and partners are the backbone of the CMC. With the support of generous  individuals donating their days, evenings, and weekends, the CMC has increased temporal and spatial  data collection throughout the watershed. These data support significant insights on watershed health  from tidal estuaries in Virginia, to farms in Pennsylvania, to West Virginia trout streams, to Baltimore  Harbor, to communities in Anacostia, to wetlands in Delaware, and forests in New York. No matter the  reason individuals are collecting data, it is vital information being used to create positive change for  local ecosystems and communities. 


For more information about the Chesapeake Monitoring Cooperative, visit: https://www.chesapeakemonitoringcoop.org/

For data in the Chesapeake Monitoring Cooperative, visit: https://cmc.vims.edu/data-explorer

AI Disclosure: The Spy and its writers may use artificial intelligence tools to support accuracy and clarity in our reporting.

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