This pulldown menu lets you limit your search to references from one of the Toxic Substances Hydrology Program’s investigations.
The menu has two submenus that are controlled by radio buttons. One menu lists investigations by topic and the other menu lists investigations by location. To change the menu click on one of the radio buttons.
Investigations that are nationwide are not listed in the location submenu.
Some references are associated with more than one investigation.
Only one investigation or location can be selected at a time.
This menu can be combined with the other menus and text input boxes to create more complex queries.
For more information on an investigation please check the Toxics Program’s investigations page.