The Best Composting Toilets to Buy in 2023


If you are looking for a sustainable and eco-friendly alternative to conventional toilets, you might want to consider a composting toilet. A composting toilet is a type of toilet that does not use water or chemicals to flush away waste. Instead, it uses natural processes such as evaporation and aerobic decomposition to break down waste into a harmless and odorless compost. Composting toilets have many benefits, such as:

  • Saving water: Composting toilets use little or no water, which can save thousands of gallons of water per year and reduce your water bills.
  • Reducing waste: Composting toilets reduce the amount of waste that goes into landfills or sewage systems, which can reduce pollution and greenhouse gas emissions.
  • Producing fertilizer: Composting toilets produce a rich and organic fertilizer that can be used for gardening or landscaping, which can improve soil quality and plant growth.
  • Being versatile: Composting toilets can be installed in any location that does not have access to plumbing or electricity, such as off-grid homes, tiny houses, remote cabins, boats, and RVs.

However, not all composting toilets are created equal. There are different types, sizes, designs, and features of composting toilets that suit different needs and preferences. To help you choose the best composting toilet for your situation, we have reviewed the top five products on the market based on their performance, durability, ease of use, maintenance, and customer feedback.

Our Top Picks

  1. Best Overall: Nature’s Head Self Contained Composting Toilet. This is a high-quality and user-friendly composting toilet that has a sturdy design, a built-in fan and vent hose, a liquid-separating feature, and a space-saving handle. It is easy to install, operate, and empty, and it can handle regular use by two adults for several weeks before needing to be emptied.
  2. Best Separating: Separett Villa 9215. This is a waterless self-contained composting toilet that has an electric fan to exchange gases, operating on both 110V in a standard outlet or 12V in an RV or boat. It has a urine-diverting feature that separates liquid from solid waste, which reduces odor and moisture. It also has a child seat adapter and a biodegradable bag system for easy disposal of solid waste.
  3. Best for Tiny House: Sun-Mar Compact Composting Toilet. This is a medium-capacity composting toilet that uses electricity to heat up and evaporate excess liquid. It has a patented Bio-drum that rotates to mix and aerate the waste, which speeds up the composting process. It also has a vent fan that eliminates odor and a finishing drawer that collects the finished compost.
  4. Best Automatic: DeerValley DV-1F52508. This is an advanced and fully automatic composting toilet that uses sensors to control the temperature, airflow, and moisture level in the composting chamber. It has a large capacity that can accommodate up to four people full-time or six people part-time. It also has an automatic mixing mechanism that ensures even decomposition of waste.

Buying Guide

Best composting toilets are a great way to reduce your environmental impact and save water. They are also ideal for off-grid living, RVs, cabins, and tiny houses. However, not all composting toilets are created equal. There are some things to consider before buying one.

  • First, you need to decide between a self-contained or a central composting toilet. A self-contained unit has the composting chamber and the toilet seat in one piece, while a central unit has a separate composting chamber that can be installed in a basement or outside. A self-contained unit is easier to install and maintain, but it has less capacity and may produce more odor. A central unit can handle more waste and has better odor control, but it requires more plumbing and ventilation.
  • Second, you need to consider the size and capacity of the composting toilet. You should choose a model that can accommodate the number of people who will use it and the frequency of use. You should also check the dimensions of the unit and make sure it fits your space. Some composting toilets are designed for low or medium use, while others are suitable for heavy or continuous use.
  • Third, you need to consider the power source and ventilation of the composting toilet. Some models require electricity to operate fans, heaters, or mixers that speed up the composting process and reduce odor. Others are non-electric and rely on natural air flow and manual stirring. You should also make sure that the unit has a proper vent pipe that can be routed to the outside to eliminate any smell.


Q: How do I empty and clean a composting toilet?

A: The frequency of emptying and cleaning a composting toilet depends on the model and the usage. Generally, you should empty the composting chamber when it is about two-thirds full. You should also add bulking material such as sawdust or peat moss regularly to improve the composting process and absorb moisture. To clean the unit, you can use mild soap and water or vinegar and baking soda. Avoid using harsh chemicals that can kill the beneficial bacteria in the compost.

Q: Is a composting toilet safe and sanitary?

A: Yes, a composting toilet is safe and sanitary if used and maintained properly. The composting process kills most pathogens and reduces the volume of waste by up to 90%. The end product is a nutrient-rich fertilizer that can be used for gardening or landscaping. However, you should always wear gloves and wash your hands when handling the compost. You should also follow local regulations regarding the disposal or use of humanure.

Q: What are the benefits of a composting toilet?

A: A composting toilet has many benefits for both you and the environment. It can save up to 60 gallons of water per person per day, which lowers your water bill and conserves a precious resource. It can also reduce your sewage or septic system costs and maintenance. It can produce valuable compost that can enrich your soil and plants. It can also reduce greenhouse gas emissions by preventing methane production from anaerobic decomposition.


Composting toilets are an eco-friendly alternative to conventional toilets that can help you save water, money, and resources. They can also provide you with organic fertilizer for your garden or lawn. However, before buying one, you should consider some factors such as the type, size, capacity, power source, and ventilation of the unit. You should also learn how to use and maintain your best composting toilet properly to ensure its safety and efficiency.

Serena Hammes

Serena Hammes is a digital nomad and solo female travel blogger. She shares her first-hand experiences using various public toilets when traveling to destinations around the globe. Cassie's blog posts provide unique perspectives on amenities, safety and accessibility of restrooms specifically geared towards female travelers discovering both popular and off-the-beaten-path locations. Her candid reviews and photos of toilets in various countries and cities highlight the facilities and features that would be most appreciated by women on the road. For female users of our toilet directory, Hammes's on-the-ground input serves as an helpful reference guide for planning worry-free trips.

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