EPA Website
Link to the Federal EPA Site

OSHA Website
Occupational Safety and Health Administration

Water Environment Federation
Preserving and Enhancing the Global Water Environment

NIST
National Institute of Standards and Technology

SW-846
Test Method for evaluating Solid Wastes Physical/Chemical

American Water Works Association
The Authoritive Resourse on Safe Water

NIOSH
National Instute for Occupational Safety and Health