A World Leader In Composting Toilets For Over 40 Years

(Some toilets only separate waste, ours separate and treat your waste)

Buy composting toilets here or at over 10,000 stores

Find Your Perfect Composting Toilet

Our most popular self-contained and urine diverting composting toilets

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Shop Excel NE
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Sun-Mar composting toilets are a safe and environmentally friendly method of waste treatment. Our composting toilets evaporate liquids and compost the solids, saving water and creating usable compost for your favorite shrubs or flower gardens.

Our 3 chamber design means easy operation and maintenance. Our patented Bio-drum means fast, odor-free composting, and we’re the only ones certified by the NSF to NSF/ANSI Standard 41 for residential and cottage use.

Do you need a bathroom near your pool? In a beach house, or a tree house? A tiny home or RV? What about a barn, in your chalet, or in your cabin in the woods? Sun-Mar’s robust line of composting toilets has a toilet to fit your every need and provide comfortable bathroom facilities in your home, or your home away from home.

Sun-Mar has a comprehensive line of composting toilets, and we take part in several tradeshows throughout the year. If you’d like to learn more, contact our sales department at 905.332.1314 ext 1032 or by email at sales@sun-mar.com

Explore the leader in composting toilet innovation

Sun-Mar Composting Toilet Profile: The Smithsonian Institute
Customer review: Longtime user loves their composting toilet
Explore Sun-Mar's Excel NE Composting Toilet
Explore Sun-Mar's GTG Urine Diverting Composting Toilet

Click to visit our video gallery 

Click the images below to view profiles on Sun-Mar composting toilet installations

Sun-Mar partners with NASA for their Hi-Seas simulation of how composting toilets can be a part of life on Mars.
Sun-Mar teamed up with Clayoquot Wilderness Resort to bring composting toilets to their glamping getaway.
The Smithsonian brought Sun-Mar composting toilets on board at their CCRE facility.
Sun-Mar composting toilets have become a part of Tim Horton Children's Foundation.

Click here to read more profiles of Sun-Mar composting toilet installations all over the world.  If you have an interesting Sun-Mar composting toilet installation, we’d love to write a profile on it! Reach out to marketing@sun-mar.com for more information.

Sun-Mar composting toilets have been featured in many different articles over our 40 + years of innovation. We’ve gathered a few of them together and put them in one easy-to-find location. 

The Gold Standard

Sun-Mar is certified by the NSF under this stringent standard. Testing is conducted for 6 months at a NSF recognized, independent testing laboratory under a strict test protocol. There is only one performance standard for composting toilets in North America. This is National Sanitation Foundation NSF/ANSI Standard #41. 

Click here to learn more about our NSF certification and for more information on our certified products.