Want Data?
Whether you are a curious citizen, student with a project, consultant, or a planner, you came to this page to get data. The links in the "More Info" table will get you
started. Want more? Try the links below.
DNR data:
 /irc/ links to the DNR
Information Resource Center and Carter Library, with the ultimate search engine: your librarian.
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 http://www.mdmerlin.net/ is DNR's online mapping
tool, best used with a high-speed internet connection.
Many Water Quality sampling sites are included in the MERLIN data. Once you get into the main mapping screen, choose the 'special projects' button and choose the 'water quality
sampling stations' button. It takes some time to load, but the dots are on the map. You will have to use the "InfoTips" feature tab on the left side to find out which dot is what site,
but you can zoom in and out to whatever scale you want.
http://dnrweb.dnr.state.md.us/gis/data/data.asp to download some of the datasets behind MERLIN.
http://www.mgs.md.gov/esic/freeseries.html for information on USGS topographic maps and other topics that may
help you.
Other State and Federal Data sources:
Other Water Quality data is available by using the "Data Hub" button on page: http://www.chesapeakebay.net/
The data at this site is from many programs, and it is recommended that you read the "meta-data" before using the data.
http://www.mde.state.md.us/Water/index.asp is Maryland Department of the Environment's WATER INFORMATION
CENTER.
All state regs are up on the State Documents web site (http://www.dsd.state.md.us). The water quality standards are in 26.08.02.
The Stream use designations are in 26.08.02.08 and are listed by 6-digit basin codes. (COMAR Title 26,Sub-Title 08, Chapters 01,02,03,04,08 deal with water quality regs.)
http://water.usgs.gov/ is the USGS home page for Water Resources of the United States
http://www.epa.gov/surf/ for the EPA Surf Your Watershed home page
The U.S. Environmental Protection Agency, in partnership with States, Territories and Tribes, is working to improve communication with the regulated community and the
public about the quality of the Nation's surface waters through the use of three new linked web sites.
- An Internet repository of State and Tribal water quality standards is now available on EPA's website at: http://www.epa.gov/ost/wqs. This new web site will enable any user to
obtain the full text of water quality standards that are in effect under the Clean Water Act for each State and for each Tribe authorized to develop standards. The availability of
this repository for water quality standards was also announced in a recent Federal Register Notice titled State and Tribal Water Quality Standards: Notice of EPA Approvals and
Announcement of EPA Internet Repository (see 66 FR 29951, June 4, 2001).
- The Water Quality Standards Database, http://www.epa.gov/wqsdatabase, allows the user to view the designated uses of waterbodies in a structured way. Designated uses are one
component of State and Tribal water quality standards. The designated use information is currently available for 16 states in table form, and for 11 of those states also in map form
using WATERS, described below.
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EPA's Watershed Assessment, Tracking and Environmental Results (WATERS) information system is available for a limited number of states on EPA's website at http://www.epa.gov/waters.
WATERS enables users to connect and display important water quality information on maps in their geographic context. Specifically, WATERS:
- displays key water quality information about the quality of surface water bodies, the designated use of a waterbody (e.g., drinking water supply, recreation, fish protection)
from state water quality standards, and an identification of which waters are identified as being impaired;
- allows users to quickly identify the status of individual waters of interest within a specified geographic area;
- allows users to easily generate reports summarizing key information on waters of a state;
- uses EPA's standard mapping application, Enviromapper, to display the information;
- uses the National Hydrography Dataset (NHD) maintained by the U.S. Geological Survey, as the common language to connect the information hydrologically.
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