Aguapura USA Inc.
AguaPura USA designs and builds water purification units for household, commercial, and seaborne applications.
http://www.aguapurausa.com

BiOzone Corporation
BiOzone creates effective and safe solutions for your Ozone Generator and Ozonation Needs: water disinfection, purification, color removal, process trains and more!
http://www.biozone.com/

Drinking Water and Health Basics
U.S. EPA Office of Ground Water and Drinking Water information on drinking water and health, including the National Primary Drinking Water Standards, fact sheets on specific drinking water contaminants, and guidance regarding Cryptosporidium for people with compromised immune systems.
http://www.epa.gov/safewater/dwh/index.html

Delft University of Technology
Department of Sanitary Engineering. Research and education programs on the 'urban water cycle', namely, including drinking water supply, waste water collection and urban drainage, and waste water treatment.
http://www.citg.tudelft.nl/live/pagina.jsp?id=f101fd4d-f95a-41eb-a561-2a555b90a58d&lang=en

Massachusetts Drinking Water Education Partnership
Provides year-round educational programs and information to increase public understanding of drinking water issues. Dedicated to protecting drinking water supplies and public health through collaborative projects, culminating in Drinking Water Week events each May.
http://madwep.org/

Water Purification Products, Inc.
Drinking water systems, and water analysis kits.
http://wppinc.com/

Non Chemical Water Treatment Systems
Lehmier Electric specializes in non-chemical water treatment, automatic emergency backup generators, and Electric-Saver systems.
http://www.lehmierelectric.com

National Drinking Water Clearinghouse
NDWC offers technical assistance and information about drinking water treatment, management, distribution, infrastructure, Safe Drinking Water Act regulations, and ground, surface and water conservation for America's small, rural communities.
http://www.ndwc.wvu.edu

Crystal Pure Drinking Water
Water purification vending machines. Online order form.
http://www.crystalpuredrinkingwater.com

BSK Analytical Laboratories
BSK Laboratories provides quality analytical services to municipalities, consultants and private industry in California, Nevada and Colorado
http://www.bsklabs.com/