These are good links to Nanotech environmental regulatory efforts:

Nanotechnology Service of the European Commission
Project on Emerging Nanotechnologies
U.S. EPA National Center for Environmental Research Nanotechnology Home
ICON -- International Council on Nanotechnology
National Institute for Occupational Safety and Health:  Nanotechnology Topic Page

Technorati Tags : ICON, Nanotechnology, Environmental, Nanotoxicity, Health