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Take Home a Composting Toilet Barrel Kit

*Kits are available for pickup in Tucson only!*

DIY Composting Toilet Kits

Did you know traditional toilets are the biggest source of indoor water use? Replace your traditional toilet with a waterless composting toilet and save thousands of gallons of water a year, while producing a safe, nutrient-rich fertilizer at home. Composting toilets are also an alternative to installing a costly septic system at a new home.

To start, you'll want to:

  1. Look up permitting requirements for your county - Check out our permitting guide if you live in Arizona.
  2. Plan where to put your compost toilet so it’s convenient and comfortable to visit throughout the year.
  3. Decide on what composting toilet system fits your needs. Our 2-barrel and 3-barrel models have  high capacity and have been approved by the Arizona Department of Environmental Quality (ADEQ).
  4. Purchase a compost toilet kit with WMG and pick it up at our office. If you may need additional assistance to install your compost toilet let us know how we can help.
Kit Components

Designed, tested, and refined over the years by David Omick, an expert on sustainable living from southern Arizona, the barrel composting toilet system is easy to use and cost-effective. This design features a series of 55-gallon high-density polyethylene (HDPE) barrels as the collection and composting container. A customized HDPE panel top serves as a removable lid and a seat, vent, and light trap platform. To complement the barrel composting toilet design, this kit includes a low-cost, practical urine diversion system that provides additional nutrients for your plants.

Please note :These systems are listed on Arizona Department of Environmental Quality's (ADEQ) approved composting toilet list. If you reside in Pima County, a typical permit will cost $575. If you live in a county that delegates authority back to the Arizona Department of Environmental Quality (ADEQ), your permit may cost up to $1,000.

You Information
How many individuals plan to use the composting toilet full time? The number of users determines the number of recommended barrels. Number of barrels = numbers of users + 1
Where will you locate your composting toilet. Each barrel requires a 2ft by 2ft space + access. If outdoors we strongly recommend providing a shelter that will protect the barrel top from rain and sun. Be sure your shelter is not within property boundary setbacks. Check with your local jurisdiction regarding property setbacks for basic structures (i.e. garden sheds or other).