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To catch the rain cover.png Sign up for our new book on Rainwater Catchment and Community.


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The new and improved Marsh
AEF greywater. For our final project we rebuilt a greywater system at the CSA, Arcata Educational Farm. Greywater consists of all used water produced at a particular site, except for water coming from the toilet, which is known as blackwater. When building a greywater system you first separate the greywater from the blackwater and send the greywater through a separate treatment system. Ideally, after the greywater passes through the purification process it will then be able to be reused. Greywater systems are an appropriate use of technology for many reasons. Some of them being: they reduce the use of fresh water, there is less stress on existing more conventional septic tanks, it is a highly effective purification process, and there is less chemical and energy use required. In our case the majority of water used on the farm is to water vegetables, herbs, flowers and fruits, and the source of greywater comes from the outdoor kitchen, used by the farmers and volunteers to cook and wash vegetables or dishes.
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UABJO Demonstration Wetland Wastewater Treatment, Reclamation, and Outreach

A wetland waste water treatment and reclamation plant that is part of UABJO's Outreach program in Oaxaca, Mexico.

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Community action news

Critical Mass Chicago 050826.jpg
Nov 16 Chicago: Come for the fun, stay for the revolution [1]

Nov 14 Climate news 2017: Record Emissions: 41 Billion Tons of Heat-Trapping Carbon Dioxide Were Added to the Atmosphere This Year[2]

Nov 13 Climate news 2017: COP23: Where is the place for community-led initiatives? [3]

Nov 10 Towards sustainable economies news: Building resilience [4]

Nov 10 Spain: Climate Change Related Drought Bakes the Iberian Peninsula [5]

Read More...


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Thomas Edison
I’d put my money on the Sun and Solar Energy, what a source of Power! I hope we don’t have to wait until oil and coal run out, before we tackle that.

Thomas EdisonW
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Hot topics / In the news

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Planted cattails at Millcreek greywater
Greywater, sometimes also spelled as graywater, grey water or gray water, is all of the effluent water from a household, such as water discharged from lavatories (bathroom sinks), bathtubs, showers, clothes washers, and laundry trays. Greywater is not wastewater from a sink used for food preparation, or water closet (toilet) wastewater.

The water leaving our homes carries nutrients and value. It may also contain pathogens, and/or harsh chemicals and care should be taken with it. However, it is not a great risk compared to blackwater (sewage).

Redirecting the water we use for tasks such as showering allows us to reclaim some of that value to grow plants and recharge the water table. It may be necessary to choose our soaps and detergents more carefully, if we use the greywater for watering and fertilizing plants.

Main portal: Water
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ENGR 215 Introduction to Design projects – Spring 2010: World Shelters: One lab of the Spring 2010 semester of Engineering 215 worked worked with World Shelters to design and improve upon structures by leveraging the resources of Haiti and World Shelters.

Spring 2010 ENGR 215 Intro to Design Projects - World Shelters
Simple Square
Reduces the amount of unique connecting pieces needed to construct World Shelter's JAS Shelter  
Rock Roots JAS
JAS Shelter retrofits to withstand a Class One hurricane  
Make it Complete with Papercrete
Inner wall system incorporates the use of papercrete, a weatherproof and fire resistant material  
Rubble to Resource
Rubble trench foundations utilize rubble to rebuild Haiti  
Bags of Shelter
Earthbag shelter designed for use as a transitional shelter  
Titanium Sun Shield
Primer and topcoat application over the polypropylene exterior of a WorldShelters temporary structure  
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