Data and Tools

Science Datasets

The data collected and the techniques used by USGS scientists should conform to or reference national and international standards and protocols if they exist and when they are relevant and appropriate. For datasets of a given type, and if national or international metadata standards exist, the data are indexed with metadata that facilitates access and integration.

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Evapotranspiration station at Lake Mohave, AZ
October 22, 2015

Evaporation data from Lake Mead and Lake Mohave, Nevada and Arizona, March 2010 through April 2015

Evaporation data from Lake Mead and Lake Mohave. USGS and Bureau of Reclamation are cooperating on a multi-phase study to improve 24-Month Study model projections by improving monthly estimates of evaporation from Lake Mead and Lake Mohave. 

Eddy-covariance sensors at Lake Mohave, Nevada
October 22, 2015

Evaporation data from Lake Mead and Lake Mohave, Nevada and Arizona, March 2010 through April 2015

Evaporation rates were measured at Lake Mead and Lake Mohave, Nev. as part of a multi-phase evaporation study. This USGS data includes evaporation data from March 2010 through April 2015 for Lake Mead and from May 2013 through April 2015 for Lake Mohave.

USGS Online GW Quality Mapper Nat Map
January 17, 2015

Online mapper Provides Decadal Look at Groundwater Quality

An online mapper provides summaries of decadal-scale changes in groundwater quality across the Nation.​ The mapper shows how concentrations of 24 contaminants, such as nutrients, pesticides, metals, and volatile organic compounds, are changing over decadal periods in 67 groundwater networks.

USGS: Science for a changing world
January 17, 2014

Health-Based Screening Levels Database

The online Health-Based Screening Level database contains benchmarks for over 700 contaminants. Health-Based Screening Levels (HBSLs) are non-enforceable water-quality benchmarks that can be used supplement U.S. Environmental Protection Agency Maximum Contaminant Levels and Human Health Benchmarks for Pesticides.

Imperiled snail data map
December 17, 2013

American Fisheries Society List of Freshwater Gastropods (Snails) from Canada and the United States

At this website, one can view lists of native freshwater snails by state or province boundary, and plot distributions of snails by political boundaries. Lists can be downloaded for use in reports or analyses. Data file last updated 12/17/2013.

Imperiled fish data map
April 25, 2013

The 2008 AFS Endangered Species Committee list of imperiled freshwater and diadromous fishes of North America

At this website, one can view lists of imperiled fishes by freshwater ecoregion, by state or province boundary, and plot distributions of imperiled fishes by ecoregions or political boundaries. Data file last updated 4/25/2013.

Imperiled crayfish data map
March 17, 2011

The 2007 AFS Endangered Species Committee list of common and imperiled freshwater crayfishes of the United States and Canada

At this website, one can view lists of crayfishes by freshwater ecoregion, by state or province boundary, and plot distributions of crayfishes by ecoregions or political boundaries. Data file last updated 3/17/2011.