10 Best Composting Toilets 2025 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 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 Modiwell Smart Dry Flush Toilet is a compact, portable waterless toilet designed especially for RVs, camping, tiny homes, and similar uses where traditional plumbing isn’t available. Weighing only 17 pounds and with a footprint of 16"x16"x11", it’s easy to carry and fits small spaces well. Instead of composting, it uses a self-contained dry-flush system that seals waste in bags automatically with a single button press, which makes it very user-friendly and eliminates odors effectively. This system also prevents liquid leaks by using coagulant pouches, which helps keep mess and smell under control.

It supports users up to 350 pounds thanks to sturdy stainless steel legs, making it stable and comfortable for adults. The built-in rechargeable battery can last for 70–100 uses per charge, so it doesn’t need a constant power source, which is great for off-grid situations. Since it uses disposable bags, you have to manage waste bags regularly, which can add ongoing costs and environmental considerations compared to composting toilets that recycle waste on-site. There is no active ventilation system, but the sealed bags and coagulants work well to control odor.

Because it’s a dry-flush model rather than a traditional composting toilet, it doesn’t perform liquid and solid waste separation or compost waste internally. That makes it simpler to maintain but might not suit users looking for a fully self-contained composting solution. This toilet provides an easy, odorless, and portable option for people needing a waterless toilet without complex upkeep, best suited for camping, travel, or temporary setups rather than full-time composting.