The 5 Best Composting Toilet Reviews in 2021

Composting toilets offer a functional and eco-friendly way of answering nature calls. With a well-ventilated container that holds and decomposes human waste, these toilets require no flushing. They depend on aerobic bacteria to breakdown human waste, which makes them an ideal choice for travel trailers, cabins, boats, mobile homes, trucks, and buses, as well as recreational vehicles.

After scouring the web for many hours and analyzing tens of composting toilets, we found these five as the best composting toilets. You can rest assured that these new toilets are completely hygienic and will not release any foul odors in your surroundings.

Our top choices are durable, easy to install and offer a good value for your money, with the most outstanding one being Nature’s Head Self Contained Composting Toilet. Many users have been praising its ease of use and build quality. Read on to learn more about this toilet and four others that made it to our list.

5 Best Composting Toilet Reviews 

1. Nature’s Head Self Contained Composting Toilet

This composting toilet from Nature’s Head is one of the best composting toilets for tiny houses and among the cheapest models on the market. However, don’t mistake it to be of low quality because of its price as it is highly durable and convenient. With an innovative, space-saving design, this is a perfect option for people who need a toilet to fit in tight spaces. Nature’s Head Self Contained Composting Toilet doesn’t require a water supply or connection to a sewer line.

This self-contained toilet comes with a separate urine holding tank and waste holding tank, which means the two never mix. In addition, it comes with a fan to speed up the composting process. You can turn the fan on when the toilet is in use and turn it off when the composting process is over.

To empty, just open the clips on both sides of the liquid tank and pull the unit by its handle. It offers about 80 flushes on solid waste storage, but the urine tank needs to be emptied regularly.

This composting toilet is an ideal option for RV or boats as it is designed to fit smaller spaces.


  • Has a standard seat height and thus ideal for everyone
  • Has separate tank and waste tank to prevent odors
  • You get stellar customer support from Nature’s Head
  • Emptying waste is easy
  • Convenient to carry around
  • It is durable and stable
  • Can support different weights and heights


  • Can only accommodate few users
  • The urine container doesn’t have an indicator that it is full and also fills up too fast
  • Not ideal for heavy usage

Overall, this is a quality composting toilet we can recommend to anyone looking for a portable toilet to fit in tiny spaces. It has a perfect height that supports virtually all users and is comfortable to use.


2. Camco 41535 Portable Travel Toilet

Made by one of the most respected and renowned brands in the industry, Camco, this portable toilet is among the best composting toilet models.

Compared to most other models, Camco 41535 portable toilet has a larger seat and larger bowl size. As you will learn following on in this guide, the capacity of the waste storage tank is a crucial part to consider when looking for a portable composting toilet.

The waste storage tank on this toilet is detachable, and thus easier to empty when it gets full. It is sealed firmly to keep off-odor from leaking from the tank. In terms of capacity, the waste storage tank has the capacity to hold up to 2.6 gallons of waste.

This means you can carry the toilet around even when the storage tank is full. To make the task of emptying its tank easier, the interior surface is slick. This means solid waste will not get attached to it. To remove the tank, you just need to toggle a locking latch on the side. The latch system on this model is spring-loaded, which makes it easier to operate.

Just like other products made by Camco, this portable travel toilet is made from premium construction materials that make it durable, and thus worth the money. For instance, the removable lid is made from durable ABS resin. In addition, it has a solid base that allows it to accommodate people of different weights.


  • It features a compact design, which presents it ideal for smaller spaces
  • This toilet is equipped with a detachable waste tank that makes disposing of waste easier
  • The interior surface is slick for easier emptying and cleaning
  • It uses a pumping toilet flush action to ensure the bowl is clean and hygienic
  • The waste tank is sizeable enough to accommodate usage by several individuals
  • It is made of high-quality materials which makes it durable


  • It is relatively larger than most models which makes it less portable
  • If not installed properly, the latch may begin to leak odor after some time

Overall, this Camco portable travel toilet is lightweight and features an attractive design with a durable body. It is an ideal choice for travelers or campers.


3. Nature’s Head Dry Composting Toilet

Nature’s Head is one of the most respected makers of composting toilets, and this is another valuable product from them. With an innovative design, this urine diverting and self-contained toilet offer good value for the money.

The waterless operation of this toilet means that you can use it in multiple places. It is also compact and lightweight, which makes it perfect for use at home, in a workshop, remote cabin, or a boat.

This model features stainless steel hardware, which means it looks great. In addition, the stainless steel hardware makes it capable of withstanding harsh conditions at any place, including outdoors.

This toilet also has a standard hand crank agitator at its bottom to accelerate the composting process. It is also easy to install and comes with all the necessary accessories to ensure a fast and smooth installation. This includes a 5-inch vent hose, bottle cap, and 12 volts power plug.

The main thing that differentiates this composting toilet from other models is the agitator handle and the fact that it has an electric fan, which you can turn on and off.


  • It is easy to install
  • Self-contained, which means no regular cleanups
  • All accessories needed for installation are included
  • The molded design and stainless steel body makes it unique and classy
  • Has a faster composting rate making it the best in its category


  • It is a bit pricey
  • The handle is hard to turn

The main reason to pick this portable toilet is because of its classy design and fast composting rate. This makes it ideal for people living off-grid and in a remote cabin.


4. Nature’s Head Composting Toilet with Spider Handle

Nature’s Head started off many years ago and has a wealth of composting toilet experience. Their products feature a quality build, but there are also other reasons to choose Nature’s Head Composting Toilet. To begin with, they provide a 5-year warranty, which offers excellent value for money, especially when the cost is quite large. Being a US-based company, they offer professional customer support in case you need any help. As for durability, Nature’s Head Composting Toilet was initially designed for use in a harsh environment. Featuring stainless steel hardware, it is sturdy and will stand extreme weather and bad conditions.

Another good thing about this composting toilet is it’s odor-free. This is because it uses a two waste bin system; one for liquid waste and the other one for solid waste. Separating the two chambers means you do not have to worry about getting sewage odor.

This toiled is water-free hence no flushing needed. It works by using a spider handle to stir the solid waste after each deposit. The advantage of having the spider handle is that it’s neat and space-saving and thus doesn’t extend on the outer side.


  • It is handy and doesn’t need water/electricity hence you can take it anywhere you need
  • Easy to install
  • It doesn’t use water hence saves water bills
  • It doesn’t emit smell and has a fan that aids in ventilation


  • The disposal process might be cumbersome as you have to remind yourself to dispose of the waste regularly

This composting toilet with a spider handle from Nature’s Head has some attractive features that made it included in this list. It is portable and suits different purposes, including camping, picnic, and travel.

5. Sun-Mar Excel Toilet

The Sun-Mar non-electric toilet is a good option for people living off-the-grid. This model does not use water or electricity, a factor that saves you extra bills while ensuring that you stay comfortable. It is a popular option for those in remote areas.

The model works for any bathroom. It is waterless and hence good for regions with water problems. For green technology enthusiasts, this toilet is the perfect deal.

The Sun-Mar NE is still 100% non-polluting thanks to its patented bio-drum and recessed handle to process waste. In other words, it is a self-contained toilet that prevents odor from seeping out and converts human waste into a safe matter that would fertilize the soil.

It is designed for use in a 2-3 people residential setting as a primary toilet or for a group of up to 7 people who plan to camp in the woods for an entire weekend. The only thing you need to have while using this toilet is a drain hole. With the drain attached, you won’t need water when cleaning.

Another necessity you get during purchase is the venting kit that ensures you don’t have to deal with the odor. It meets all the NSF/ANSI standards.


  • It is odorless with 3-chamber technology
  • It’s non-electric meaning you save more energy
  • Certified by NSF
  • Has a large bowl which makes it ideal for a sizeable group of people


  • It’s a bit pricey

There are many reasons to advise this product, including being self-contained, odorless, and classy. It is the best composting toilet for people living off-grid.

Best Composting Toilet Buyer’s Guide

Why You Should Own a Composting Toilet?

  • They do not need water for flushing, which helps reduce water usage
  • They have a low power consumption rate
  • They are great for new construction in remote places and for traveling
  • They turn human waste into compost which means it can be used to enrich your garden
  • For people with small spaces such as boat cabin or traveling vans, installing a composting toilet is a noble idea

How Do You Choose the Best Composting Toilets?

Now that we have discussed our top 5 products, you might be wondering how to select the right one from the list for your needs. They may not be many products, but their features are confusing, which is why this criterion will help you choose the right composting toilet for your needs.

Factors to Consider When Buying a Composting Toilet

Type of Composting Toilet

Self-contained or central units

In simple terms, self-contained toilets are those that hold waste within a tank that is attached to the toilet structure while central units are those that are linked to a larger tank in another location. If you are targeting a few users, the self-contained toilet is your best option since it has a relatively smaller tank. However, if you have many people using your toilet, the central unit is the best bet for you.

Self Contained Composting Toilet

Electrical and non-electrical units

Depending on where you want to install your toilet, you might need to consider using power or battery. Most composting toilets are fitted with a fan that needs the power to aerate the waste to speed up the composting rate. This means you have to install them in an area with an electrical connection.


When it appears to install a composting toilet, it is important to know the dimensions of the area you need it installed. Most composting toilets need a sizeable area to install because of the ventilation needed. It is for this reason that you need to check the size of the toilet and compare it to where you need it installed. This will help you know whether the toilet will fit in the available space.

Ease of Installation

A composting toilet requires proper sealing to prevent leakages and odor. All the above composting toilets we have reviewed here are easy to install. With an already installed ventilation pipe, these units can be anchored in place, and be ready for use. It is one of the reasons they made it to our list.


The amount of waste a toilet tank can hold is what we refer to as its capacity. You should consider the capacity of a composting toilet to be sure it will serve the number of people you are targeting.

If you are looking for a toilet for use during hunting or travels, then one with a smaller tank will suit you.

Large capacity toilets should be chosen if you are targeting many people or you intend to use them for a relatively long period of time before emptying.

Care and Maintenance

Overall, composting toilets do not require a lot of maintenance, but of course, you need to keep the bowl clean.

Besides, you have to remove the compost regularly when the tank gets full to avoid causing a mess. To reduce maintenance work, go for toilets with separate urine and solid tanks.


If you intend to carry your toilet to different places, a lighter unit will be ideal, even if they tend to be pricier than their heavy counterparts.

To wind up our guide, let’s answer some of the frequently asked questions about composting toilets.

Composting Toilet FAQ’s

Question: Do composting toilets release bad odor?

Answer: No, especially when properly installed. When they have a functional ventilation system, the fan draws air into the waterless tank and vents out through a pipe. As a result, the surrounding area smells less than a traditional toilet that needs flushing.

Question: How do I clean a composting toilet?

Answer: By simply wiping your toilet using a disinfectant on the seating area. Avoid using harsh chemical agents or chlorine as they will kill the microbes doing the job of converting human wastes to compost. Therefore, green-friendly products will be ideal for cleaning these toilets.

Question: Should I switch off the venting fan after some time?

Answer: Most of the composting toilets we have reviewed in this guide come with some type of venting system to accelerate the composting process. In most cases, this involves a fan. When using this toilet frequently, the fan should be left to run throughout.

Question: Can I use toilet paper when using a composting toilet?

Answer: Yes. Composting toilets can breakdown both toilet paper and human waste. However, if possible, use single-ply paper as it breaks down faster than double-ply paper.

Bottom Line

There you have it the ultimate guide to choosing the best composting toilet! The toilets we have reviewed here are the best in the market and will give you excellent value for the money. They are also made by reputable brands, and thus, you can rest assured they are quality and durable. Additionally, they have received many positive reviews and high ratings.

Depending on your needs, you can select the best composting toilet of your choice from the list above. Make sure you pick the right choice!