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

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/

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

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/

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

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/

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/

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

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/

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

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/

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

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/

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

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/

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

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

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

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

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/

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

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/

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/

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/

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

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/

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