A World Leader In Composting Toilets For Over 40 Years

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

Buy Sun-Mar composting toilets here or at over 2,000 stores

Find Your Perfect Composting Toilet

Our most popular self-contained and urine diverting composting toilets

large rectangular image with a map and the words We have moved, and the words Our new address 384 Millen Rd Unit 5 Stoney Creek ON L8E 2P7
Shop Excel
Shop Excel NE
Buy now
Shop GTG
Shop Compact

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's Open Box Sale with details of the sale on a blue background with snow flakes
rectangular banner with a CENTREX 2000 and an AM Style II ultra low water flush toilet and the words "A different kind of composting toilet. Combines a low flush toilet in the bathroom connected to a separate central composting unit located outside or underneath

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 this link to visit our video gallery 

Click the images below to read 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.
Tim-hortons-logo
Sun-Mar composting toilets have become a part of Tim Horton Children's Foundation.
The Smithsonian brought Sun-Mar composting toilets on board at their CCRE facility.
Sun-Mar teamed up with Clayoquot Wilderness Resort to bring composting toilets to their glamping getaway.

Click here to read more profiles of Sun-Mar composting toilet installations. 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 has written several Q & A blog posts to address frequently asked questions! Click to read our composting toilet Q and A

Fun Facts

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

NSF stamp of certification

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 this link to view our NSF certification and for more information on our certified products. 

To learn more about Sun-Mar’s other certifications, visit our certifications page 

Canadian flag

All Sun-Mar composting toilets are manufactured, tested, sold and shipped world wide from the head office in Stoney Creek, Ontario, Canada, just outside of Hamilton, ON and about an hour away from Niagara Falls, ON.