10 Best Composting Toilets 2025 in the United States

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 BOXIO Toilet PLUS is a portable composting toilet that excels in several areas. Its high capacity allows users to use it 8-10 times before needing disposal, making it ideal for camping trips or mobile living situations. The design is compact and mobile, easily fitting into small spaces like car trunks or boats, with dimensions of 15.75 x 11.81 x 11.0 inches and a weight of 4.75 kilograms. This makes it extremely convenient for on-the-go use.

Additionally, it is environmentally friendly, as it requires no chemicals for waste disposal, and the simple separation system for solids and liquids ensures easy and sanitary disposal. The inclusion of a separation container with a lid and a leak-proof urine canister contributes to its hygienic use, and users have reported minimal odor issues, thanks to the HEMPLITTER and PLUG components.

Potential drawbacks include that it may require users to be diligent about maintenance to avoid any sanitation issues. There is also no mention of an integrated ventilation system, which could be a downside for those using it in enclosed spaces for longer periods. Additionally, it does not have any power source requirements, which can be seen as both a positive and negative—while it adds to the portability, some users might miss the convenience of powered features like fans for ventilation.

The Separett Villa 9215 is a waterless composting toilet designed for off-grid use, making it an excellent choice for those looking to minimize water usage or who live in remote areas. One of its strengths is its high capacity, allowing it to handle significant waste while efficiently diverting urine, which promotes better composting. The wall-mounted design saves space, a plus for smaller bathrooms or installations where floor space is limited.

Ease of maintenance is another advantage; it comes with all necessary components for simple installation and venting, which can help keep odors at bay. The materials used, including polypropylene, are durable and easy to clean, contributing to the user-friendly experience.

There are a few drawbacks to consider. The requirement for a power source (either AC or DC) can be a limitation for some users, especially in truly off-grid situations where electricity may not be readily available. Additionally, while the installation is designed to be straightforward, those not handy might find the wall mounting a bit challenging. Size-wise, while it’s compact, the 34-pound weight could be a concern for some, especially if frequent relocation is necessary. The aesthetic is quite basic, which may not appeal to everyone looking for a more modern look in their bathroom.

The Separett Villa 9215 is particularly suitable for environmentally-conscious users or off-grid living enthusiasts seeking an effective composting solution. It excels in capacity and maintenance ease but may pose challenges in power requirements and installation for the less experienced.