The data collected by the MBSS during 1995 to 2019 cover the major river basins in the State. Here is the MBSS Data Users Guide. The data have undergone quality control checks and are available by completing a Data Request Form.

Most data requests can be filled in a 30 day period. Requests submitted during one of the MBSS index periods (March 1 - April 30, June 1 - September 30) may take up to 60 days to be filled. If you are interested in a report for a site on your property that will be sampled this calendar year, ​​those reports will be sent the following spring.
​If you have questions or comments about the process, please email Katherine Hanna at katherine.hanna@maryland.gov.

Katherine Hanna
Maryland Department of Natural Resources​
Monitoring & Non-Tidal Assessment Division
580 Taylor Avenue, C-2
Annapolis, Maryland 21401