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This is a Non-Federal dataset covered by different Terms of Use than

MD iMAP: Maryland Water Quality - Tier II High Quality Waters 2012

Metadata Updated: July 23, 2021

This is a MD iMAP hosted service layer. Find more information at The intent of this dataset is for it to be used to produce maps and provide a spatial reference for all Tier II segments located in Maryland. The Clean Water Act requires that States review their water quality standards every three years and revise the standards as necessary. During this required Triennial Review the State reviewed the antidegradation policy - and identified additional stream segments that meet the minimum requirements. Current Tier II designations are made based on biological characteristics from Maryland Biological Stream Survey (MBSS) data - which is collected annually. MBSS data which identifies new Tier II segments in between Triennial Review cycles are maintained on the pending list - as they are awaiting formal promulgation. The publicly maintained list of all Tier II waters can be found for each county at the following website: This dataset is intended to be used in conjunction with the other official Tier II MDE datasets: Tier II Stream Catchments - Tier II MBSS Stations - and Tier II Stream Endpoints. Feature Service Layer Link: ADDITIONAL LICENSE TERMS: The Spatial Data and the information therein (collectively "the Data") is provided "as is" without warranty of any kind either expressed implied or statutory. The user assumes the entire risk as to quality and performance of the Data. No guarantee of accuracy is granted nor is any responsibility for reliance thereon assumed. In no event shall the State of Maryland be liable for direct indirect incidental consequential or special damages of any kind. The State of Maryland does not accept liability for any damages or misrepresentation caused by inaccuracies in the Data or as a result to changes to the Data nor is there responsibility assumed to maintain the Data in any manner or form. The Data can be freely distributed as long as the metadata entry is not modified or deleted. Any data derived from the Data must acknowledge the State of Maryland in the metadata.

Access & Use Information

Public: This dataset is intended for public access and use. Non-Federal: This dataset is covered by different Terms of Use than License: No license information was provided.

Downloads & Resources


Metadata Created Date November 10, 2020
Metadata Updated Date July 23, 2021

Metadata Source

Harvested from md json

Additional Metadata

Resource Type Dataset
Metadata Created Date November 10, 2020
Metadata Updated Date July 23, 2021
Data First Published 2016-07-29
Data Last Modified 2020-01-25
Category Hydrology
Public Access Level public
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id 35df1fad-6edb-461b-9ab4-b9ea3674ba54
Harvest Source Id ee165ef5-7b35-41a7-b3a5-5479c71b0e58
Harvest Source Title md json
Homepage URL
Source Datajson Identifier True
Source Hash fd02e4bd514f529803567eb8737b9ef1c0d1a505
Source Schema Version 1.1

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