Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
EMMMA supports mercury research and decision-making by providing tools for Mapping, Modeling, and Analysis of mercury data.
Online mapping tools, USGS maps, images and other thematic data from The National Map can be used to display and analyze mercury data and to print maps.
The model standardizes the concentrations of mercury in fish to enable comparisons among different species, individuals of different lengths and samples of different types.
Datasets atmospheric mercury emissions, National Atmospheric Deposition Program (NADP) monitoring sites, and mercury concentrations in fish-tissue, soils, stream sediments, and coal.
Understanding the causes and consequences of Hg contamination in the environment is a problem of enormous geographic scope and scientific complexity. Effectively addressing this task requires the integration of data and expertise from many scientific disciplines. The Environmental Mercury Mapping, Modeling, and Analysis (EMMMA) website, a joint effort of USGS and NIEHS, is designed to support environmental and health researchers, as well as land and resource managers by providing tools.