DNRThe stream reaches are color coded according to the Combined Index of Biotic Integrity (CIBI) scores of the MBSS sites. The CIBI is the average of the fish IBI (FIBI) and the benthic IBI (BIBI). Anything below a CIBI score of 3.0 is red (Poor), 3.0-3.9 is yellow (Fair), and 4.0-5.0 is green (Good). The Maryland Biological Stream Survey (MBSS) was Maryland's first probability-based or random design stream sampling program intended to provide unbiased estimates of stream conditions with known precision at various spatial scales ranging from large 6-digit river basins and medium-sized 8-digit watersheds to the entire state. This is a MD iMAP hosted service layer. Find more information at https://imap.maryland.gov . Feature Service Layer Link: https://mdgeodata.md.gov/imap/rest/services/Hydrology/MD_StreamHealth/FeatureServer/2ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/7810de23bb594af9acd5f78147ad3b78_2engMaryland iMapPublicMaryland Stream Health - Stream Reaches [Maryland]Web servicesMarylandLast Modified: 2025-05-12