10 Best Composting Toilets 2025 in the United States

The TRELINO Composting Toilet Evo L is a portable, odorless composting toilet designed especially for camping, vans, tents, and other small spaces. It uses a dry separation system that effectively controls odors without relying on chemicals or water, which is great for staying independent from dump stations. With two separate containers—each holding about 2.6 gallons—it can handle up to 11–22 uses for urine and 11–20 uses for solid waste before needing emptying.

The size (approximately 13 x 15.4 x 17 inches) is compact enough for tight spaces, and its sturdy ABS plastic body supports users up to 330 lbs, making it reliable and durable. Ventilation is managed through the design that dries waste to reduce smell, but no powered ventilation system is included, meaning airflow depends on the environment. Maintenance is straightforward thanks to the easy-to-remove waste containers and included bags, although frequent emptying is necessary if used heavily. It doesn’t require electricity, making it convenient for off-grid use.

Its German-made quality and 7-year warranty add confidence in durability, though some users might find the capacity limiting for longer trips or multiple users. This model is a solid choice for those seeking a portable, clean, and eco-friendly toilet option for outdoor or small-space use.

The OGO™ Compost Toilet stands out as a practical solution for those who live in RVs, tiny houses, boats, or off-grid environments. Its urine separating feature is a highlight, effectively preventing odors and eliminating the need for chemicals or water, which is a big plus for users looking for a more eco-friendly option. The toilet's capacity allows for 25-30 uses for solid waste and 2.4 gallons for liquid, which is reasonable for its intended use in smaller spaces.

One of the strengths is its robust build quality, designed to handle up to 550 lbs, ensuring durability over time. Its compact size (15"L x 16"W x 18.4"H) makes it suitable for tight installations, and the modern design adds a touch of aesthetics to small living areas. Maintenance is straightforward due to the removable solids bin and urine bottle, making cleaning a hassle-free process. However, users should note that, while the toilet is designed to be odorless, proper ventilation is still important for optimal performance. It does not require a black tank or dump stations, which can be a significant advantage for those who travel frequently.

On the downside, the OGO™ Compost Toilet has a Best Sellers Rank of #313,898 in Automotive and #80 in RV Toilets, which might suggest that it's not as widely recognized compared to other models. As for power sourcing, this unit is electric, which means a reliable power source is necessary. If you are in a completely off-grid setting, this could be a drawback. The OGO™ Compost Toilet is a strong contender for eco-conscious users seeking a convenient, easy-to-maintain composting toilet solution for compact living arrangements.

The Nature's Head Self Contained Composting Toilet is designed for those seeking an efficient and odor-free solution for waste management. One of its standout strengths is its large capacity; it can serve two people full-time, allowing for easy emptying every 4-6 weeks, which is quite practical for households or camping situations. The installation process is also user-friendly, making it accessible for individuals who are reasonably handy around the house. Plus, the manufacturer's commitment to customer service ensures support if needed, which can be reassuring for first-time users.

The design of the toilet, specifically the Close Quarters Spider Handle, is another plus, as it aims to optimize space without compromising functionality. Users will appreciate that the product claims to maintain zero odor, which is a common concern with composting toilets. This can make a significant difference in comfort and hygiene, particularly in small living spaces or off-grid setups.

There are some considerations to keep in mind. While the installation is straightforward for those with basic skills, it may still pose a challenge for individuals who are not handy. The plastic material, while lightweight, might not appeal to everyone’s aesthetic preferences compared to more traditional toilet designs. Additionally, while the toilet can handle waste effectively, regular maintenance is still necessary, such as ensuring the composting process is optimal, which some users may find daunting.