Activated Sludge Microorganisms
   Discusses and illustrates the organisms in sludge, and what can be learned by microscopic analysis of biological treatment systems for wastewater.
   http://www.engitech.com/asm.htm

Ames, Iowa Water and Pollution Control Department
   Drinking water and wastewater treatment provider for the City of Ames, Iowa
   http://www.city.ames.ia.us/waterweb/

Association of Metropolitan Sewerage Agencies (U.S.)
   Has current news and information about clean water issues (such as nonpoint source pollution and radioactivity in municipal wastewater), as well as resources for POTW operators.
   http://www.amsa-cleanwater.org/

CIPCA
   Colorado Industrial Pretreatment Coordinators Association
   http://cipca.org/

Camden County Municipal Utilities Authority
   The CCMUA treats 55-60 million gallons per day of wastewater in Camden County, NJ, USA. Topics run from industrial pretreatment to sludge disposal.
   http://www.ccmua.org/

Cap-Net.Org
   Water education and training, integrated water resources management, IMRM, IWRM, reports, training material, case studies, information, specialists, global water partnership, capacity building in IWRM, database of global water management, training institu
   http://www.cap-net.org/

ChemDen Nitrate Conversion Pilot Plant
   Information about a new denitrification technology to convert nitrate in wastewater, agriculture runoff, and other waters to nitrogen gas.
   http://www.lanl.gov/orgs/tt/pdf/techs/chemden.pdf

Clean River Works, Portland's Combined Sewer Overflow Program
   A collection of sewer projects for reducing CSOs from the west side of the Willamette River in Portland, Oregon.
   http://www.portlandonline.com/cso/

Database Central
   Wastewater organisms database.
   http://home1.gte.net/vsjslsk1/index.htm

Ecowaters Projects
   CEPP conducts workshops, demonstrations, evaluation and public education about ecological wastewater solutions, such as composting toilets and graywater systems.
   http://www.ecowaters.org/

Iowa Water Pollution Control Association
   Design, construction, operation, and management of water pollution control works and exchange of information.
   http://www.iawpca.org/

Irepolia Environmental studies and analysis center
   Conducts research and technology development on wastewater treatment methods. Site is in English and French.
   http://www.irepolia.com/

King County Industrial Waste Program
   How the county (Washington state, USA) regulates industrial discharges into its wastewater system, including discharge limits, approvals, enforcement, and fees.
   http://dnr.metrokc.gov/wlr/indwaste/index.htm

Living Technologies Ltd.
   Designs and builds ecological wastewater treatment systems called 'Living Machines in UK.
   http://www.ltluk.com/

Maine Lagoon Systems
   Information about the operation and science of aerated lagoons for wastewater treatment.
   http://www.lagoonsonline.com/

Michigan Water Environment Association (MWEA)
   A forum for all water environment topics.
   http://www.mi-wea.org

NSF International: Certified Wastewater Treatment Units
   Database of wastewater treatment processes and equipment (for industrial, municipal, and residential use) that have been evaluated and certified to meet technical standards.
   http://www.nsf.org/Certified/Wastewater/

National Small Flows Clearinghouse
   Provides information about alternative waste water systems for home owners or communities serving fewer than 10,000 people who treat wastewater via septic systems. Includes publications, services and databases of related information.
   http://www.nsfc.wvu.edu/

Science Traveller International
   A wastewater forum with information on wastewater software and news. It also includes 'Wastewater World Wide' - extensive Wastewater Web Link pages.
   http://www.scitrav.com/wwater/

Sewage World
   Wastewater and water treatment plants around the world: virtual visit and industrial flowcharts
   http://www.sewage.net/

U.S. EPA Office of Wastewater Management
   Information on wastewater treatment technologies, NPDES permitting requirements, biosolids management, EPA water quality initiatives, and other water quality topics.
   http://www.epa.gov/owm/index.htm

Wastewater Pollution in China
   An article on wastewater pollution in China, by Kris Min.
   http://darwin.bio.uci.edu/~sustain/suscoasts/krismin.html

Wastewater Treatment Principles and Regulations
   Fact sheet on wastewater treatment, by Ohio State University.
   http://ohioline.osu.edu/aex-fact/0768.html

Wastewater fact sheet
   From Pipeline* by National Small Flows Clearinghouse. This publication has been adapted for use in Indiana by Purdue University
   http://danpatch.ecn.purdue.edu/~epados/septics/wwater.htm

Water and Wastewater Equipment Manufacturers Association
   WWEMA is a non-profit trade organization for companies that manufacture products sold to the potable water and wastewater treatment industries. Members supply leading-edge products and technologies, offering solutions to numerous water-related environment
   http://www.wwema.org/

WaterWiser
   Water efficiency clearning house. Directory of water and wastewater related publications, products and services.
   http://www.awwa.org/waterwiser/

WaterWorld Magazine: Municipal Water/Wastewater Information
   Liquid and solid waste, water quality, contamination and pollution information, trends and technology online for professionals in the municipal water and wastewater industry.
   http://ww.pennnet.com/

World Wide Web Virtual Library: Wastewater Engineering
   Municipal Wastewater, Academic and Research Institutions, Professional and Trade Organizations, Consultants, Suppliers, Resource bases, Company listing collections, Pretreatment, and Agencies.
   http://www.cleanh2o.com/ww/