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6 Best Composting Toilets Reviews & Buying Guide 2022

6 Best Composting Toilets Reviews & Buying Guide 2022

6 Best Composting Toilets Reviews & Buying Guide 2022

A composting toilet is a type of dry toilet that treats human waste by a biological process called composting. This process leads to the decomposition of organic matter and turns human waste into compost-like material. Composting is carried out by microorganisms under controlled aerobic conditions.

  • Types: Slow composting (or moldering) toilets, active composters (self-contained), vermifilter toilets
  • Position in sanitation chain: User interface, collection/treatment (on-site)
  • Management level: Household, public, shared (most common is household level)
  • Application level: Household, neighborhood

Composting toilets get the job done, whether you’re off the grid on a boat or in a stateroom, enjoying the freedom of tiny house living, or want to upgrade your old traditional water-hog toilet. They use little or no water and do not require a connection to a sewer system, so they work by allowing the natural process of aerobic decomposition to occur.

Bestseller No. 1
Nature's Head Self Contained Composting Toilet with Close...
  • No one - and I mean no one - will beat my customer...
  • Easy to install by any reasonably handy person.
  • Absolutely No Odor. No Maintenance. 5 Year...
  • Huge Capacity. 2 people using full time will empty...
  • A vast improvement over older composting toilet...
SaleBestseller No. 2
Essential Composting Toilets: A Guide to Options, Design,...
39 Reviews
Essential Composting Toilets: A Guide to Options, Design,...
  • Baird, Gord (Author)
  • English (Publication Language)
  • 192 Pages - 11/27/2018 (Publication Date) - New...
Bestseller No. 3
Nature's Head® Self Contained Composting Toilet with Foot-Spider...
  • Item Category: Toilet Seat
  • Item Trademark: Nature's Head
  • manufacturer: Nature's Head Inc.
  • Item shape: Foot-Spider
Bestseller No. 4
Separett Villa 9215 AC/DC
  • Composting,Waterless,Urine diverting, off-grid,...
Bestseller No. 5
OGO™ Compost Toilet Self Contained Waterless for RVs, Vanlife,...
  • Electric agitator with an easy to empty solids bin
  • Modern, sleek compact design with very small...
  • USA Made with direct human contact customer...
  • Urine level indicator light with urine separating...
  • 2.4 gallon urine bottle and 25-30 use solids bin
Bestseller No. 6
The Floating Empire composting toilet book: Building your own DIY...
  • Amazon Kindle Edition
  • Elwell, Don (Author)
  • English (Publication Language)
  • 03/02/2019 (Publication Date) - Wild Shore Press...
Bestseller No. 7
Thinktank Composting Toilet
  • Brand New Composting Toilet solves major problems...
  • Airtight with separate air intake and exhaust...
  • Men can stand when using!
  • Very easy to clean. No bowl to get messy. Waste is...
  • Easy to use. Never need to add peat moss or turn a...
SaleBestseller No. 8
Composting Toilet System Book: A Practical Guide to Choosing,...
27 Reviews
Composting Toilet System Book: A Practical Guide to Choosing,...
  • David Del Porto (Author)
  • English (Publication Language)
  • 240 Pages - 04/01/1999 (Publication Date) -...
SaleBestseller No. 9
SUN-MAR GTG TOILET | Portable Toilet, Compost Toilet for RV
  • COMPACT AND PORTABLE - The efficient GTG is the...
  • INSTALLS IN MINUTES - This portable potty for...
  • SOLID/LIQUID SEPARATION - This smart toilet...
  • TINY - The most compact porta potty camp toilet...
  • EASY DISPOSAL - The GTG functions similarly to a...

Some are permanently installed with ventilation to the outside, while others are portable, so they are easier to set up and can be moved to another location if needed. While many people build their own using the “humanure” system, also known as the bucket and sawdust method, some great options on the market offer convenience and less mess.

While no organization sets functional requirements for these products, some manufacturers seek NSF International certification. This independent organization verifies that consumer products meet basic standards, such as being odor-free and capable of handling their advertised capacity.

1. Best Overall: Nature’s Head Self-Contained Composting Toilet

This self-contained toilet features stainless steel hardware, a built-in 12-volt fan, and a hose to vent to the outside and is made in the USA. The agitator for mixing materials is operated with a space-saving spider handle, but you can also get it with a standard crank handle. Peat or coir works best as a filler or substrate for processing waste.

There is virtually no odor, making it ideal on a boat or RV. Many people say that liquids need to be emptied every few days, but solids can last for months—the company estimates about 60 to 80 uses before you need to open.

Two veteran sailors designed the bathroom in 2007. The company supports charities like the Unchained Movement, which combats domestic sex trafficking, and Warrior Homesteads, which provides homeless veterans with sustainable housing on farmland.

Because there is a wide variation in how these units work and are installed, be sure to follow the manufacturer’s instructions when installing them. 

Most of them don’t require a ton of woodwork or special skills to install. But in some municipalities, you may need to obtain a permanent installation permit, so do your homework in advance to be aware of local regulations.

2. Best Separation: Separett Villa 9215 Urine Diversion Toilet

This toilet has been made in Sweden since 1976 and happens to be the brand founder Graham Hill has in his Maui home. The Separett separates urine and solid waste to reduce odor and volume to handle.

When you sit down, a screen covers the solid waste container and, at the same time, rotates it so that the contents are evenly distributed. There is also a child seat that can be purchased and placed in the middle for the little ones.

It comes with a fan that has AC/DC adapters. You can use a biodegradable bag placed in the container to simplify cleanup. There is no need to add bulky material, so it looks and “feels” more like a regular toilet. The company supports projects to improve sanitation in China and Peru.

Composting toilets are not maintenance-free, so follow your manufacturer’s recommendations to keep everything running smoothly and odor-free. Finally, remind all guests to be seated during use; otherwise, the units will not separate liquids and solids properly. Which helps prevent odors.

3. Best Compact: Sun-Mar Compact Waterless Electric Composting Toilet

If you’re looking for a mid-capacity toilet, this low-profile unit is compact and more affordable than many other models. It plugs into a standard 110-volt outlet and is designed for seasonal use for up to three adults or one adult for residential help.

Use the handle to mix and aerate the materials in the three-chamber holding drum every other day the unit is used. You will also need to add one cup of cargo material per person per day. The customer service isn’t the greatest, but it’s easy to install and eliminates the hassle of septic problems in rural areas.

4. Best Budget: Loo’s Lovable Starter Kit

If you need a simple and inexpensive solution for your off-grid camping, this low-tech option is the answer. It requires no electricity, water, plumbing, ventilation, or chemicals. It’s a bucket inside a wooden box with the toilet seat attached.

You will add sawdust to cover the waste after each use. You can add the contents to your outdoor compost bin or pile when the container is complete. The simple concept of this product has been promoted for years by Joe Jenkins, a humanure advocate.

5. Best Automatic: BioLet 65 Composting Toilet

This closed-system toilet, made in Sweden, breaks down waste materials in the bathroom itself. It’s expensive, yes, but it’s fully automatic: sitting down opens the hatches, and closing the lid activates the mixing arm to break up the paper and distribute the moisture in the upper chamber. 

A fan recirculates the hot area under the compost. The afloat switch activates heat if the excess liquid is detected.

The dry material falls into the lower chamber, where an LED light indicates when it needs to be emptied. The only additional expense is a compost mix, which must be added to the toilet to jumpstart the process. 

It’s worth the price if you’re very squeamish about maintaining other types; additionally, it is designed for families of four for full-time use and six for part-time help.

6. Best for Multiple Users: Envirolet MS10 Self-Contained Waterless System

Envirolet is another popular composting toilet, Design Editor Lloyd Alter owns. This all-in-one design features a wide box for air circulation around the compost.

The unit, manufactured in Canada, has dual fans to create a high volume of high-velocity airflow and a heater to evaporate liquids. You won’t have to spin anything to mix the content, so it’s easier than some systems.

Its large capacity means it’s a good choice for families or those who receive many visitors. It can accommodate up to eight people per day for vacation use or six people for continuous use.

Bestseller No. 1
Vive Handheld Bidet - Attachment Bathroom Accessories - Cloth...
  • VERSATILE SPRAYER FOR IMPROVED HYGIENE:...
  • HANDHELD FOR INCREASED CONTROL: A smooth, wide...
  • EASY WALL OR TANK INSTALLATION: Easily mount the...
  • SLEEK STAINLESS STEEL CONSTRUCTION: Made with...
  • VIVE GUARANTEE: One year guarantee so you can...
Bestseller No. 2
Swiss Madison Well Made Forever SM-1T254 St. Tropez One Piece...
  • Modern design, clean, sleek look and compliment...
  • Fully skirted trapway - extremely easy to clean
  • Sleek and eye appealing modern design
  • Soft closing seat included
  • Special holes to reach the bolts - includes bolt...
Bestseller No. 3
Nature's Head® Self Contained Composting Toilet with Foot-Spider...
  • Item Category: Toilet Seat
  • Item Trademark: Nature's Head
  • manufacturer: Nature's Head Inc.
  • Item shape: Foot-Spider
SaleBestseller No. 4
Veken Ultra-Slim Bidet, Non-Electric Dual Nozzle...
  • 【Two spraying modes】 - This bidet attachment...
  • 【Adjustable water pressure】- The chrome-plated...
  • 【More Durable】- Plastic inlets found on other...
  • 【Thin and Compatible】- This bidet sprayer for...
  • 【Easy to install】 - Veken provides simple and...
SaleBestseller No. 5
HAKDAY Portable Female Women Urinal Camping Travel Toilet Device...
  • ❤Material: Made with flexible, medical grade...
  • ❤Leak-free and Easy to use: A wide funnel to...
  • ❤Compact and Discreet: Urine funnel is small,...
  • ❤Features: Female urination device that allows...
  • ❤Multipurpose: Ideal Accessory for Travelling,...
SaleBestseller No. 6
Camco Portable Toilet with Seat and Cover, 5 Gallons, Blue...
  • Portable Travel Toilet: This portable camping...
  • Sturdy Construction: This bucket toilet is made of...
  • Easy Handling: Portable toilet features an...
  • Easy to Clean: This portable toilet for camping...
  • Quality Products: Camco makes quality products for...
Bestseller No. 7
Earring Pack Round Full Diamond Earrings Jewelry Birthday...
  • Thi Biker Earrings Earrings Valentines Earring...
  • Come Multiple Earrings for One Ear Stainless Steel...
Bestseller No. 8
WOODBRIDGE T-0019-CH TOILET, WIth Chrome Button
  • ✅ [LUXURIOUS MODERN DESIGN]: Luxurious Modern...
  • ✅ [EASY TO CLEAN DESIGN]: The skirted trap way...
  • ✅ [CHROME BUTTON]: A timeless, sophisticated and...
  • ✅ [QUITE AND POWERFUL FLUSHING]: Siphon Flushing...
  • ✅ [Map Flush 1000 Grams]: Best Maximum...
Bestseller No. 9
Nature's Head Self Contained Composting Toilet with Close...
  • No one - and I mean no one - will beat my customer...
  • Easy to install by any reasonably handy person.
  • Absolutely No Odor. No Maintenance. 5 Year...
  • Huge Capacity. 2 people using full time will empty...
  • A vast improvement over older composting toilet...
SaleBestseller No. 10
LUXE Bidet Neo 120 - Self Cleaning Nozzle - Fresh Water...
  • A LUXURIOUS LOOK AT AN EXCELLENT PRICE – With a...
  • HYGIENIC NOZZLE GUARD GATE – Shields the nozzle...
  • HAVE FUN DOING IT YOURSELF - Includes ALL PARTS...
  • ENVIRONMENTALLY-FRIENDLY, WORTHWHILE INVESTMENT...
  • NO KIDDING 18-MONTH WARRANTY – We are always...

Types Of Composting Toilets

Make sure you are working on your location before purchasing a composting toilet. There are two types – standalone and split/central systems – and while they both break down waste, they work differently and have different requirements.

Standalone system

The compost toilet compost system consists of a small toilet with a detachable tank and a liquid drain to remove waste. Some standalone systems are portable, suitable for camping trips or boat rides, and can be placed where plumbing does not reach, such as a workshop or garage.

The entire composting process takes place in the toilet, hence the name. When finished, remove the hopper and empty the manure. These systems sometimes have freshwater tanks or supply lines to flush the wastewater into the chamber below.

Shared system or central system

Composting toilets that work with shared or central systems are similar to traditional bathrooms. They connect to a pipe system that feeds waste to a central bio-drum, hopper, or composting hopper.

The hopper compacts waste, allowing it to decompose while discharging odorless gases. When the tank is full, empty it like a standalone toilet.

A split compost toilet system is much more expensive than standalone composters as they require a hopper, usually installed underneath the toilet. Hoppers are an advantage as they significantly increase the compost they can hold.

They may be an attractive solution for off-grid permanent or eco-friendly homes, but the setup makes these composting toilets a poor choice due to their portability.

Buying Guide For The Best Composting Toilets

Keep the following points in mind to make the best compost toilet choice for your needs.

Available Space

Composting toilets take up slightly more space than a traditional toilet and do not require an additional container for feces. Look for a compact composting toilet with a smaller waste container for a small house or boat.

If space is available for a split system, it is worth the increased capacity investment. Areas such as garages and cabins sometimes have the option of adding a hopper. In warmer climates, mounting the tank outdoors is an option.

Portable vs. Composting 

A portable toilet and a composting toilet may seem similar, but some very significant differences. Composting toilets use bacteria to break down human waste. 

They separate solid and liquid waste, allowing bacteria to feed on the organic compounds. After the composting process, a person can strengthen the lawn or garden. A by-product of the composting process fertilizes the soil and provides the plants with nutrients.

The portable toilet does nothing of the sort. In portable toilets, everything goes to one waste container, in which no liquids are separated from solids. 

Even after pouring enzymes and deodorant into the tank to break down the solids and balance the unpleasant odor, the end product still has to end up in a sewage system or septic tank. So, while a portable toilet may be helpful for camping and boat trips, it may not be the best choice for permanent residences such as mobile homes and small apartments.

Tank capacity

When looking for the best composting toilet, how many people will use it should decide how large a tank is required. Manufacturers often break this down into family size and appropriate use.

For example, a split system with a large capacity tank could handle waste from three adults or a family of five, while a standalone composting toilet with a 5-gallon tank would be sufficient for one adult. The idea is that, with the right tank size, the waste will have enough time to break down into manure before the tank is full.

Utility Usage 

Some composting toilets use electricity to run a fan that draws air into the tank and through the waste. The atmosphere is rich in oxygen, which fuels the aerobic bacteria that break down waste. It also exchanges the carbon dioxide produced by the bacteria, releasing it into the air. Many work with a home 110V system, while some work with both 110V AC and 12V DC from a car or RV battery.

A composting toilet may also require a water connection. Though counterintuitive, composting toilets that use water use very little with each flush – much less than a standard residential toilet. Waterless and non-electric models are also available, so consider your utility configuration and household budget when choosing the bathroom that will work best.

SaleBestseller No. 1
Composting Toilet System Book: A Practical Guide to Choosing,...
27 Reviews
Composting Toilet System Book: A Practical Guide to Choosing,...
  • David Del Porto (Author)
  • English (Publication Language)
  • 240 Pages - 04/01/1999 (Publication Date) -...
Bestseller No. 2
Nature's Head Self Contained Composting Toilet with Close...
  • No one - and I mean no one - will beat my customer...
  • Easy to install by any reasonably handy person.
  • Absolutely No Odor. No Maintenance. 5 Year...
  • Huge Capacity. 2 people using full time will empty...
  • A vast improvement over older composting toilet...
Bestseller No. 3
Separett Villa 9215 AC/DC
  • Composting,Waterless,Urine diverting, off-grid,...
Bestseller No. 4
OGO™ Compost Toilet Self Contained Waterless for RVs, Vanlife,...
  • Electric agitator with an easy to empty solids bin
  • Modern, sleek compact design with very small...
  • USA Made with direct human contact customer...
  • Urine level indicator light with urine separating...
  • 2.4 gallon urine bottle and 25-30 use solids bin
Bestseller No. 5
Nature's Head® Self Contained Composting Toilet with Foot-Spider...
  • Item Category: Toilet Seat
  • Item Trademark: Nature's Head
  • manufacturer: Nature's Head Inc.
  • Item shape: Foot-Spider
Bestseller No. 6
Essential Composting Toilets: A Guide to Options, Design,...
  • Amazon Kindle Edition
  • Baird, Gord (Author)
  • English (Publication Language)
  • 385 Pages - 11/27/2018 (Publication Date) - New...
Bestseller No. 9
Compost-It Compost Accelerator / Starter 100g Spout Pack for All...
  • Starter and accelerator to create nutrient-rich...
  • Suitable for all composting systems and worm farms
  • Over 60 different active ingredients, fast,...
  • Reduces unpleasant and unhealthy odors, perfect...
  • Chemical and poison free - safe and natural...
SaleBestseller No. 10
YITAHOME Portable Sink and Toilet, 17 L Hand Washing Station &...
  • RECYCLING WORKING: The hand washing station...
  • PORTABLE CAMPING SINK: The portable handwashing...
  • COMPOSTING TOILET: The T-type water outlet of...
  • SAFE & LEAK-PROOF: The camping wash basin and...
  • EASY TO INSTALL: For its detachable and compact...

Odor removal

The gases produced by the bacteria in the composting toilet must be removed. Otherwise, odors may build up, or the bacterial performance may suffer from a lack of fresh oxygen. 

Some models’ fans suck air into the tank and push gases through the vent, removing unpleasant odors. After each use, organic materials such as sawdust to the top of the waste can block the smell while allowing bacteria to break down the solids.

What are the drawbacks of a composting toilet? List of Cons for Composting Toilets

  • Not every composting toilet contains the odor well. …
  • It may be difficult to use. …
  • They don’t always save space. …
  • People will talk about it. …
  • Single units may require extra compost maintenance. …
  • A special permit may be required to install it.

Can you pee in a composting toilet?

Separate Chambers

In a composting toilet that has two Chambers, one is for feces and one is for urine. You can pee in the toilet with absolutely no problems at all. This is because the toilet diverts urine into its own chamber.

Do composting toilets stink?

Does composting toilets smell bad? When people consider the new idea of compost toilets, they assume the toilet would stink up the house. They donít. In fact there, there is very little odor at all, and what little smell you get is similar to the smell of wood or mulch.

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