The maps can be used to inform many different water quality planning efforts, including those taken to meet the Chesapeake Bay Total Maximum Daily Load (TMDL) and Watershed Implementation Plan.
This map is current and was most recently updated in November of 2016. This map will be updated on an as-needed basis as new information becomes available. Much of this information can be accessed via websites maintained by national, state, local governments, academic and non-government organizations. aerial photography, topographic coverage, etc). University of Maryland - Horn Point Laboratory (Cambridge, MD)For more information about this page, please contact Matthew Stover at There are a variety of water quality information sources in the State of Maryland. Click "download" above for a zip file containing the following Tier II GIS files (updated as of November 2016):To return to the main High Quality Waters (Tier II) page, click Please direct any questions or comments concerning Maryland's Antidegradation program to Angel Valdez at
Please use this Feedback Google Form to address any questions or comments about the Water Quality Trading Program.. Contact Information. Clicking a stream or catchment will display the Tier II segment or catchment information. The data used to produce this map … Each water body in Maryland is assigned a use class. The Maryland Water Quality Trading Advisory Co mmittee acts as an ongoi ng consultative group to provide direction to the overall trading program and to oversee further enhancement of the trading infrastructure. Users should use these files for informational purposes only and not as the legally defined boundaries for each use class. Contact Information. To navigate the interactive map, use your arrow to drag and pan.
The new trading program will provide expanded opportunities for all point and nonpoint sources by giving them access to the water quality marketplace and flexibility in meeting and maintaining their load limits by acquiring credits and/or offsets generated from load reductions elsewhere. This geodatabase provides water body names and the designated use classes (e.g. Please direct questions or comments to the MDE Water Quality Trading Program: mde.wqtrading@maryland.gov Questions or comments related to agricultural credits should be directed to MDA's Trading Administrator: NuTrade.mda@maryland.gov Click "Download Geodatabase” below for a zip file containing the geodatabase that delineates use classes for the following water body types (updated as of January 2019):Please direct questions or comments concerning Maryland's water quality standards to Timothy Fox at To navigate the searchable map above, use your pointer arrow to drag and pan. Please direct questions or comments concerning Maryland's water quality standards to Timothy Fox at tim.fox@maryland.gov or 410-537-3958. aerial photography, topographic coverage, etc).
Creating maps with a DJI Phantom 3, Phantom 4, Mavic or Inspire 1 has never been easier. Click the plus and minus buttons to zoom in and out. Its first task will be to review and refine a comprehensive Maryland Trading Manual document. For other water quality mapping information, please visit MDE's Water Quality Maps page. This map will allow users to view parcel boundaries, add other MDE data for water quality and TMDL data, and add other State data from the iMAP data portal.
This map will be updated on an as-needed basis as new information becomes available. How to Use the Searchable Map. The "Real-time" map tracks short-term changes (over several hours) of water quality. Montgomery County Department of Environmental Protection (DEP) developed an interactive web map with dynamic infographics displaying the County’s restoration efforts … To go directly to maps of Maryland's use classes/designated uses please click HERE. Assessments have been made for a variety of water body types and show both good water quality and impairments.