10 Best Composting Toilets 2026 in the United States

The Modiwell Dry Flush Toilet offers a waterless and odorless solution designed for RVs, vans, boats, tiny houses, and off-grid use. Unlike traditional composting toilets, it uses an automatic dry flush system that seals waste in disposable bags, making it very easy to use and maintain without dealing with messy composting processes. Its built-in rechargeable battery supports 70 to 100 uses per charge, which is convenient for trips or places without plumbing. The toilet is compact (17"x17"x11") and lightweight (17 pounds), making it portable and versatile for many environments.

It supports users up to 350 pounds, with sturdy stainless steel legs for stability. Being self-contained, it doesn’t require ventilation systems or complicated liquid and solid separation typical of composting toilets. However, because it uses disposable waste bags and coagulant pouches, you will need to manage trash disposal regularly, which may not appeal to those wanting a zero-waste, fully composting system. It also depends on electricity for flushing, so prolonged off-grid use requires keeping the battery charged.

This toilet is a cleaner, less smelly, and easier to maintain alternative to composting toilets, especially in mobile or temporary setups. But if you prioritize large capacity or a truly composting method without waste bags, a traditional composting toilet might suit you better.

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.

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.