Filters: System Type: Data Release (X) > Categories: NOT Data Release - In Progress (X) > Date Range: {"choice":"week"} (X) > partyWithName: U.S. Geological Survey - ScienceBase (X) > Categories: pre-SM502.8 (X)

Filters Date Types (for Date Range) Contacts U.S. Geological Survey Upper Midwest Water Science Center Upper Midwest Water Science Center Water Mission Area Water Resources Tag Types Place (1) Theme (1) Harvest Set (1) Tag Schemes Common geographic areas (1) ISO 19115 Topic Category (1) none (1) Alexandria Digital Library Feature Type Thesaurus (1) USGS Metadata Identifier (1) USGS Thesaurus (1) View Results as: JSON ATOM CSV

Principal Aquifers of the 48 Conterminous United States, Hawaii, Puerto Rico, and the U.S. Virgin Islands These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. This map layer contains the shallowest principal aquifers of the conterminous United States, Hawaii, Puerto Rico, and the U.S. Virgin Islands, portrayed as polygons. The map layer was developed as part of the effort to produce the maps published at 1:2,500,000 in the printed series "Ground Water Atlas of the United States". The published maps contain base and cultural features not included in these data. This is a replacement for... Categories: pre-SM502.8; Tags: Alabama, Arizona, Arkansas, California, Colorado, All tags... Connecticut, Delaware, District of Columbia, Florida, Geohydrology, Georgia, Hawaii, Hydrogeology, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Puerto Rico, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, US aquifers, USGS Science Data Catalog (SDC), USGS:551a02f7-9c31-4ab3-b6f3-0841b1f05958, United States, Utah, Vermont, Virgin Islands of the United States, Virginia, Washington, West Virginia, Wisconsin, Wyoming, aquifers, groundwater, health, intelligenceMilitary, Fewer tags