Current Stream Health Overview
The Maryland Biological Stream Survey uses a “stratified random design” in determining sampling locations. First, the number of sites needed to be sampled in order to estimate the stream health of the watershed within a known statistical accuracy is determined based on the number of stream miles within the watershed. Next, a computer program randomly selects sites on streams in that watershed for sampling. DNR staff then contact the landowners to receive permission to access the sites from their property.
After all the sites in the watershed have been sampled, the results are then compiled to assign an overall rating of “good”, “fair”, or “poor” for streams in the watershed. It is important to note that stream health can vary considerably from location to location within a watershed based on activity on the adjacent land. As a result, there may be several “good” sites in an overall “poor” watershed and visa versa.
In the News
Message From the Governor
The health of the Bay is ultimately determined by what we do on the land -- in our cities and towns, on our farms and forests, in our schools and backyards. The 10,000 miles of streams that run through our communities can deliver either clean water or pollutants to the Bay. It’s our Bay and it’s our choice.
Thank you for choosing to get involved in improving the health of your stream and our Bay.