Toxmap has an online mapping feature provided by the U. S. National Library of Medicine that displays the Enviromental Protection Agency’s Toxic Release Inventory and Superfund Programs. The small map interface can be used to zoom, pan and query; for those who have access to GIS software it might be better to download the data.

The FAQ page provides some interesting comments such as “Remember that not all maps are made by professional cartographers. Today’s image and cartography software have made it possible for non-cartographers to create and design maps that may hide or obscure features that many users would expect to find.” Cartographers, of course, would never do such a thing.