Cold climate sewage treatment specialists

Residential Wastewater Treatment Systems

Lifewater Engineering Company offers above ground and below ground ExtremeSTP® residential sewage treatment plants. The above ground units are specifically designed for areas where permafrost, bedrock or other ground or soil conditions make it impractical to install a below ground system. For the above ground systems, the preferred location for discharge is to undisturbed, natural vegetation such as a black spruce forest floor, the tundra surface, or a peat bog.


Lifewater’s residential ExtremeSTP® sewage treatment plants:


• Will operate at -60°F (-53°C), provided reliable electrical power is available
• Will not corrode and never need painting
• Are sized to be aircraft transportable to remote northern communities
• Utilize submerged, fixed film, activated sludge aerobic sewage treatment
• Include UV disinfection
• Include an effluent pump 


The following types of systems are available:

(all systems have effluent discharge pumps)

• Double-walled, fully insulated systems for outdoor installation above ground (with or without built-in inlet lift station) 
• Single-walled, uninsulated systems for indoor installation
• Single-walled, insulated systems for installation below ground


The following optional equipment is available for residential or small commercial use:


• Arctic outdoor lift station (to lift raw sewage up into an above ground treatment plant)
• Thermosyphon (to keep the permafrost underneath the system frozen )


Larger Homes or Apartment BuildingsGood construction on permafrost - including an insulated gravel pad, a Triodetic foundation, an above ground sewage treatment plant with a thermal break beneath it, and a surface discharge to natural vegetation


Larger models are available for larger homes and apartment buildings. 



Systems suitable for subdivisions are described under Village, Subdivision, or Cluster Systems

ExtremeSTP (XSTP)® 


Available above-ground models:

SST300 (up to 3-bedroom home on hauled water; up to 2-bedroom home on a well or piped water)

SST300-LS (with built-in inlet lift station; up to 3-bedroom home on hauled water; up to 2-bedroom home on a well or piped water)

SST600 (up to 4-bedroom home)

SST600-LS (with built-in inlet lift station; up to 4-bedroom home)

BBR500 (up to 3-bedroom home; membrane bioreactor sewage treatment plant)


Available below-ground models:

SST650-UG (up to 4-bedroom home)


Separett® Toilets


Separett® waterless toilets are designed to be placed in homes and cabins where there is no access to septic systems, or where a homeowner desires to use less water.

Village, Subdivisions and Cluster Systems

Fixed film or membrane bioreactor systems provide alternatives to lagoons and traditional wastewater treatment plants.


SST1200 (fixed film)

Lifewater Engineering Company, 1963 Donald Avenue, Fairbanks Alaska 99701    Tel: 907-458-7024    Toll Free: 1-866-458-7024