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

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

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

Institute of Water Treatment and Research Haiyang
Water treatment equipment ,design and construction of projects for the production of drinking water,pharmaceutical and electronical industries and all kinds of water treatment.
http://www.helpwater.com

Association of Metropolitan Water Agencies [AMWA]
Association of Metropolitan Water Agencies [AMWA] - The site features items of interest in the fields of drinking water regulation and legislation, the Safe Drinking Water Act, Source Water Protection, Watershed Assessments, Drinking Water Treatment, and Competitiveness issues for Public Utilities.
http://www.amwa.net/

Aqua Technique
Manufacturers of drinking water treatment and vending machine equipment producing drinking water from non-potable supply sources.
http://www.aqua-technique.fr/eng_index.htm

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/

Drinking Water Services
Anybody who uses a natural untreated drinking water source should confirm that it is a safe supply through regular testing.
http://www.drinking-water.co.uk

National Drinking Water Clearinghouse
Information primarily for and about small community drinking water systems. Includes fact sheets, educational materials, and information on water treatment technologies successfully used in small U.S. community water supply systems.
http://www.nesc.wvu.edu/ndwc/ndwc_index.htm

California Water Association
A consortium of investor-owned water utilities providing water utility services to customers throughout California. Site has information on drinking water standards, water treatment, and related topics.
http://www.calwaterassn.com/