- 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.
- Frequently Asked Question about Onsite Wastewater Treatment and Disposal Systems - About septic systems and other small-scale onsite wastewater management.
- Grey Water Central - Provides definitions, technical information, and regulations, as well as discussing possible applications and system design.
- Greywater - Technical information on characteristics and system designs.
- How Stuff Works: Sewer and Septic Systems - Illustrated multiple-part explanation of how sewer systems and septic tank systems really work, with related links.
- Kentucky Onsite Wastewater Training Center - Training for designers, manufactures, installers, regulators, and homeowners, in the installation, operation, and maintenance of onsite wastewater treatment systems.
- Managing Household Wastewater - Mississippi State University fact sheet on septic tanks and soil absorption systems for household sewage and wastewater.
- 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.
- On-Site Wastewater Research Program - Site has information on septic system technology and other onsite sewage treatment options. (Nova Scotia provincial research program.)
- Recycling of Greywater - How to process greywater from shower for toilet flushing in a simple and sustainible way.
- Septic Protector - How septic systems function, what causes them to fail, information and products to help prevent them from failing.
- 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.
- 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.
- 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.
- The Septic System Owner's Manual - A straightforward, easy to understand, non-scholarly book on residential wastewater disposal.
