Grey Water Central
- Provides definitions, technical information, and regulations, as well as discussing possible applications and system design.
- http://oasisdesign.net/greywater/

On-Site Wastewater Research Program
- Site has information on septic system technology and other onsite sewage treatment options. (Nova Scotia provincial research program.)
- http://centreforwaterresourcesstudies.dal.ca/cwrs/onsite/cwrstab.htm

Managing Household Wastewater
- Mississippi State University fact sheet on septic tanks and soil absorption systems for household sewage and wastewater.
- http://msucares.com/pubs/publications/p1869.htm

Septic Systems (Pennsylvania Perspective)
- On-line guide to on-lot wastewater disposal in Pennsylvania provides basic information on approved, alternative and experimental land-based wastewater disposal and recharge systems.
- http://www.webdesignpros.net/consult/septic/septicsystem.htm

Recycling of Greywater
- How to process greywater from shower for toilet flushing in a simple and sustainible way.
- http://www.reinerhildebrand.de/grau/grey.html

Texas Water Resources Institute
- Serves as a focal point for water-related research at Texas universities, encouraging discussion of statewide issues through meetings and multi-university studies. Includes calendar of events, newsletters, and reports.
- http://twri.tamu.edu/

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/

How Stuff Works: Sewer and Septic Systems
- Illustrated multiple-part explanation of how sewer systems and septic tank systems really work, with related links.
- http://www.howstuffworks.com/sewer.htm

Septic Yellow Pages
- Septic system questions, answers and searchable directory of over 5,000 septic system professionals. Also includes a homeowner Septic System information section.
- http://www.septicyellowpages.com/

Kentucky Onsite Wastewater Training Center
- Training for designers, manufactures, installers, regulators, and homeowners, in the installation, operation, and maintenance of onsite wastewater treatment systems.
- http://www.kentuckyonsite.org/

Ecological Dry Toilets and Other Water Conservation Alternatives
- About small-scale solutions for water conservation: dry toilets, rainwater harvesting, constructed wetlands for greywater treatment, and organic gardening.
- http://www.laneta.apc.org/esac/drytoilet.htm

The Septic System Owner's Manual
- A straightforward, easy to understand, non-scholarly book on residential wastewater disposal.
- http://www.shelterpub.com/_shelter/ssom_book.html

Septic Protector
- How septic systems function, what causes them to fail, information and products to help prevent them from failing.
- http://www.septicprotector.com/

NOWRA
- The National Onsite Wastewater Recycling Association, Inc. (NOWRA) was founded in 1991 as a national professional organization to advance and promote the onsite wastewater industry.
- http://www.nowra.org/

Frequently Asked Question about Onsite Wastewater Treatment and Disposal Systems
- About septic systems and other small-scale onsite wastewater management.
- http://www.ci.austin.tx.us/wri/faq.htm

Greywater
- Technical information on characteristics and system designs.
- http://www.greywater.com/