The Ultimate Guide to Choosing an Eco-Friendly Bathtub for a Sustainable Bathroom

Stylish Modern Bathtub

Choosing an eco-friendly bathtub for your sustainable bathroom can be a challenging task. Did you know that 87% of professional builders prefer freestanding tubs due to their eco-friendly nature? This guide will simplify the process by providing key considerations, comparing different materials, and reviewing top eco-friendly bathtubs on the market.

Keep reading to create a healthier, greener bathroom space!

Key Takeaways

  • Consider the material, durability, water efficiency, and impact on health when choosing an eco-friendly bathtub for a sustainable bathroom.
  • Avoid bathtub materials like acrylic, fiberglass, ceramic tiles with lead glaze, and vinyl as they are not environmentally friendly.
  • Opt for healthy and eco-friendly materials such as cast iron, reclaimed crushed marble, NativeStone (a renewable concrete blend), or SculptureStone (made of ground natural minerals and a high-performance green resin).
  • Key brands offering eco – friendly bathtubs include Kohler with their enameled cast iron tubs and American Standard with their Americast Engineered Steel technology. These options provide durability, heat retention, low chemical emissions, and recyclability.

Key Considerations for Choosing an Eco-Friendly Bathtub

Consider the material, durability, water efficiency, and impact on health when choosing an eco-friendly bathtub.

Material of the bathtub

Selecting an eco-friendly bathtub begins with a careful examination of the material used in its construction. Materials like cast iron are highly recyclable, durable and excellent at retaining heat, making them an environmentally friendly choice.

For instance, Kohler’s Villager Alcove Soaking Bathtub is made from enameled cast iron and has even earned itself Environmental Product Declaration (EPD) recognition. American Standard utilizes Americast Engineered Steel, which expertly combines porcelain with steel for strength while integrating a structural composite backing for environmental consideration.

Other manufacturers such as Apaiser use locally-sourced crushed marble in their bathtubs to minimize transportation emissions. The key here is to prioritize materials that are both sustainable and healthy – those that don’t contribute negatively to indoor air quality or water pollution.


Durability is a major consideration when choosing an eco-friendly bathtub. Long-lasting tubs contribute less waste to landfills and require fewer resources for production and installation.

Cast iron bathtubs, such as those offered by Kohler, are highly durable and recyclable. They also hold heat extremely well, reducing the amount of energy needed to warm your bathwater.

Similarly, American Standard uses Americast Engineered Steel for their tubs – a blend of steel and porcelain that ensures longevity along with lightweight design features. Opting for high-quality materials like these not only assures longevity but also contributes significantly towards creating a sustainable bathroom space.

Water efficiency

In the realm of sustainable bathing, water efficiency takes center stage. Eco-friendly bathtubs prioritize low-water consumption, aligning with UN Sustainable Development Goal 6: Clean Water & Sanitation.

Many such bathtubs are designed to retain heat for longer periods, reducing the need for additional hot water and subsequently saving energy. For instance, cast iron tubs hold heat well which translates into less frequent refilling and reheating of water.

Opting for a bathtub equipped with Low-flow shower heads equally adds another layer to your eco-conscious lifestyle as it curbs extravagant water usage by dispensing smaller amounts of water while maintaining satisfactory pressure levels.

By selecting a bathtub that champions effective use of resources, you’re not just making an environmentally wise choice but also positioning yourself to reap benefits in terms of reduced utility bills over time.

Impact on health

The choice of bathtub materials can have a significant impact on your health. Some common materials, such as acrylic, can contain harmful phthalates and bisphenol toxins that may be released into the water you bathe in.

Fiberglass bathtubs, often coated with gelcoat resin, can emit volatile organic compounds (VOCs) that may contribute to indoor air pollution. It’s essential to opt for healthier alternatives like cast iron bathtubs with lead-free enamel finishes or enameled steel tubs that are scratch-resistant and durable.

When it comes to accessories, consider using non-toxic bath mats made from organic cotton canvas material or certified by GOTS (Global Organic Textile Standard). Additionally, don’t forget to choose low-toxin caulks and glues for installation purposes to ensure an overall healthy bathing experience.

Remember that safety data sheets for tubs might not always be provided, making it challenging to find information on materials and manufacturing processes. To make an informed decision about your eco-friendly bathtub purchase, it is best to look for products with relevant certifications such as GreenGuard Gold Certifications or ones recommended by reputable organizations like the U.S. Green Building Council or German Sustainable Building Council.

Bathtub Materials to Avoid for a Sustainable Bathroom

It is important to be aware of certain bathtub materials that are not environmentally friendly and should be avoided if you want to create a sustainable bathroom. Here are some materials to steer clear of:

  • Acrylic: Bathtubs made from acrylic can contain harmful phthalates and bisphenol toxins, which can be detrimental to both your health and the environment.
  • Fiberglass: Many fiberglass bathtubs are coated with gelcoat resin, which contains volatile organic compounds (VOCs). These chemicals can release harmful air pollutants that contribute to poor indoor air quality.
  • Ceramic tiles with lead glaze: Some ceramic tiles have glazes that contain lead, along with other toxic metals like zinc, barium, chromium, manganese, cobalt, and nickel. Additionally, certain ceramic tiles may also contain radioactive minerals.
  • Vinyl bathtubs or liners: Vinyl is a non-recyclable material that releases PVC and other toxic chemicals during its production and disposal process. This material is not recommended for a sustainable bathroom.

Healthy and Eco-Friendly Bathtub Materials

Choosing a healthy and eco-friendly bathtub material is essential for creating a sustainable bathroom. Here are four options to consider:

  1. Cast Iron: Cast iron tubs are not only durable but also environmentally friendly. They are made from recycled materials and can be recycled again at the end of their life. Cast iron tubs have excellent heat retention properties, allowing you to enjoy longer baths without using excessive hot water.
  2. Reclaimed Crushed Marble: Opting for nontoxic stone bathtubs made from reclaimed crushed marble is another eco-conscious choice. This material is sourced locally to minimize transportation emissions and offers a luxurious and natural aesthetic.
  3. NativeStone: NativeStone is a renewable concrete blend that combines vegetable fiber jute with concrete. It provides excellent heat retention and durability while being environmentally friendly.
  4. SculptureStone: SculptureStone is a non-porous material made of ground natural minerals and a high-performance green resin with renewable and recycled content. Not only does it offer excellent durability, but it also ensures easy maintenance and cleaning.

Detailed Review of Top Eco-Friendly Bathtubs

Let’s dive into the detailed review of some top eco-friendly bathtubs available in the market.

Kohler Eco-friendly Bathtub

Kohler offers a range of eco-friendly bathtubs that are perfect for creating a sustainable bathroom. One notable option is their Villager Alcove Soaking Bathtub, which is made of enameled cast iron and has received an Environmental Product Declaration (EPD).

This means that the materials used to make this bathtub have been thoroughly assessed for their environmental impact. Kohler’s enameled steel tubs are also worth considering, as they are made in the USA and do not contain any lead.

By choosing a Kohler eco-friendly bathtub, you can enjoy a luxurious bathing experience while minimizing your carbon footprint and supporting ethical business practices.

Features & Description (Kohler)

Kohler is a leading brand in the world of eco-friendly bathtubs, and their Villager Alcove Soaking Bathtub is a prime example of their commitment to sustainability. This bathtub is made from enameled cast iron, which not only provides durability but also ensures that it’s recyclable at the end of its lifespan.

With an Environmental Product Declaration (EPD), you can feel confident that this bathtub meets high environmental standards. Kohler’s bathtubs are designed to hold heat well, allowing for a relaxing and energy-efficient bathing experience.

Plus, they are resistant to scratches, cracks, and chips, ensuring longevity. When choosing an eco-friendly bathtub for your sustainable bathroom, consider Kohler as a reliable option that combines style with environmental consciousness.

American Standard Sustainable Bathtub

American Standard is a well-known brand that offers sustainable bathtub options for environmentally conscious consumers. One of their notable products is the American Standard Sustainable Bathtub, which is made using their innovative Americast Engineered Steel technology.

This unique construction method combines porcelain with steel and a structural composite backing, resulting in a lightweight yet durable bathtub. Not only does this make it easier to install, but it also ensures excellent heat retention and high resale and recycle value.

Additionally, American Standard bathtubs have met GreenGuard Gold Certifications for low chemical emissions, promoting better indoor air quality in your bathroom. With their commitment to creating eco-friendly bathing solutions, American Standard provides consumers with peace of mind knowing they can enjoy a luxurious bath while minimizing their carbon footprint.

Features & Description (American Standard)

American Standard is a trusted brand known for its commitment to sustainability and eco-friendly products. Their bathtubs are crafted using the innovative Americast Engineered Steel, which combines porcelain with steel and a structural composite backing.

This unique combination results in a bathtub that is not only lightweight but also incredibly durable and scratch-resistant.

One of the standout features of American Standard bathtubs is their excellent heat retention. This means that your bathwater will stay warm longer, allowing you to enjoy a relaxing soak without constantly needing to add hot water.

In addition to their exceptional quality, American Standard bathtubs are also considered eco-friendly. The use of Americast Engineered Steel results in reduced environmental impact compared to traditional cast iron bathtubs.

Furthermore, these bathtubs are made with recyclable materials, making them an environmentally responsible choice.

MTI Baths Eco-friendly Bathtub

MTI Baths offers a truly sustainable and eco-friendly bathtub option with their SculptureStone material. Made from ground natural minerals and a high-performance green resin, this non-porous material is not only durable but also environmentally friendly.

With renewable and recycled content, MTI Baths’ acrylic products, including soaking tubs, are designed to be as green as possible. In fact, they use over 40% post-industrial recycled material in their acrylic tubs.

So you can enjoy a luxurious bath while knowing that you’re making a positive impact on the environment.

Features & Description (MTI Baths)

MTI Baths offers a range of eco-friendly bathtubs that are both beautiful and sustainable. One standout feature is their use of SculptureStone, a non-porous material made from ground natural minerals and a high-performance green resin with renewable and recycled content.

This innovative material not only contributes to the longevity of the bathtub but also ensures it is mold-resistant, easy to maintain, and has excellent heat retention properties. Additionally, MTI Baths’ acrylic products, including soaking tubs, utilize over 40% post-industrial recycled material.

With their commitment to using environmentally friendly materials without compromising on style or functionality, MTI Baths is an excellent choice for anyone seeking an eco-friendly bathtub for their sustainable bathroom.

Bathtub Accessories for a Sustainable Bathroom

To further enhance the sustainability of your bathroom, consider incorporating these eco-friendly bathtub accessories:

  • Hemp shower curtain: Opt for a shower curtain made from organic cotton canvas material or hemp. These natural fibers are biodegradable and free from harmful chemicals often found in conventional shower curtains.
  • Shower curtain liner: Choose a PVC-free and chlorine-free liner made from non-toxic materials. Look for liners that are mold and mildew resistant to reduce the need for harsh chemical cleaners.
  • Bathmat: Select a bathmat made from sustainable materials such as bamboo or organic cotton. These options are not only environmentally friendly, but they also provide a soft and comfortable surface while stepping out of the tub.
  • Chlorine filter: Install a chlorine filter on your showerhead to reduce exposure to this chemical during bathing. This will not only benefit your health but also prevent chlorine from entering the water supply.

Tips for Installation Using Healthy Materials

  • Choose bathtubs made from non-toxic and eco-friendly materials such as cast iron, solid surface, quartz, or bio-resin.
  • Look for certifications like GreenGuard Gold to ensure the bathtub meets strict indoor air quality standards.
  • Use caulk and glues that are low in VOCs (volatile organic compounds) to prevent harmful air vapors in your bathroom.
  • Opt for caulking compounds like AFM Safecoat All Purpose Caulk or Chemlink Clear, which are known for their low toxicity.
  • Consider using adhesives like Titebond Tub & Tile Caulk or 3M Marine Adhesive Sealant 4000, which are safe and durable.
  • Check for products with certifications from healthy home resources like the U.S. Green Building Council or the German Sustainable Building Council.
  • When remodeling your bathroom, choose plywood alternatives that are free from formaldehyde and other toxic chemicals.

Remember to prioritize your health and the environment by selecting installation materials that have minimal impact on indoor air quality and contribute to a healthy living environment.

How to Maintain Your Eco-friendly Bathtub

To keep your eco-friendly bathtub in great condition, use non-toxic cleaning products, regularly check for leaks, and monitor humidity levels for optimal maintenance.

Using non-toxic cleaning products

Using non-toxic cleaning products is crucial for maintaining an eco-friendly bathtub and ensuring a sustainable bathroom. Here are some tips to help you choose non-toxic cleaning products:

  1. Look for products with natural ingredients: Opt for cleaning products that are made from plant-based or bio-based ingredients. These products are free from harsh chemicals like chlorine, ammonia, and phosphates.
  2. Read labels carefully: Check the labels of cleaning products to ensure they are certified as non-toxic and environmentally friendly. Look for certifications such as GreenGuard Gold, which guarantees low chemical emissions.
  3. Avoid synthetic fragrances: Synthetic fragrances in cleaning products can contain harmful toxins known as phthalates. Choose fragrance-free or naturally scented products instead.
  4. Make your own cleaners: Consider making your own non-toxic cleaners using simple ingredients like vinegar, baking soda, and lemon juice. These natural ingredients are effective at removing stains and disinfecting surfaces.
  5. Use microfiber cloths: Microfiber cloths are great for cleaning bathtubs as they require less water and can easily remove dirt and grime without the need for harsh chemicals.
  6. Choose reusable cleaning tools: Opt for reusable or washable cleaning tools like sponges or scrub brushes instead of disposable ones. This reduces waste and helps minimize the use of unnecessary resources.
  7. Dispose of cleaning waste properly: When disposing of old or expired cleaning products, make sure to follow local guidelines for hazardous waste disposal to avoid polluting the environment.

Regular check for leaks

Regularly checking for leaks in your eco-friendly bathtub is essential to maintain its efficiency and prevent any water wastage. Leaks can lead to increased water consumption and potential damage to your bathroom.

By scheduling regular inspections, you can identify and fix any leaks promptly, ensuring that your bathtub continues to function optimally.

One key benefit of eco-friendly bathtubs is their design, which often includes seamless construction to prevent water leaks. However, it’s still important to check for any signs of leakage around the edges or drains.

Additionally, be mindful of any unusual drops in water pressure or damp areas near the tub as these could indicate a leak.

Monitoring humidity levels

Monitoring humidity levels in your bathroom is an essential step in maintaining the health and longevity of your eco-friendly bathtub. Excessive moisture can lead to mold and mildew growth, which not only affects the appearance of your tub but also poses health risks.

To prevent this, invest in a hygrometer, a device that measures humidity levels, and keep it in your bathroom. Ideally, you want to aim for humidity levels between 30% to 50%. If you notice higher levels of humidity, consider improving ventilation by using exhaust fans or opening windows after showering.

By keeping an eye on humidity levels, you can ensure that your sustainable bathtub continues to provide a healthy bathing experience for years to come.


In conclusion, choosing an eco-friendly bathtub for a sustainable bathroom is not only beneficial for the environment but also for your health. By considering factors such as material, durability, water efficiency, and impact on health, you can make a conscious decision that aligns with your values.

Whether it’s cast iron tubs with their recyclability and heat retention or innovative materials like NativeStone and SculptureStone that prioritize renewable resources and non-toxicity, there are plenty of options available to create a bathroom that is both stylish and sustainable.

So go ahead and make a splash while making a positive impact! Check out Journey to Conscious Living for more tips!


1. What makes a bathtub eco-friendly?

An eco-friendly bathtub is made from sustainable materials such as recycled or renewable resources like bamboo, reclaimed wood, or recycled metal. It should also have water-saving features and be free of harmful chemicals.

2. How can I determine if a bathtub is environmentally friendly?

You can look for certifications such as the WaterSense label, which ensures that the product meets specific criteria for water efficiency. Additionally, check if the manufacturer provides information about the materials used and any sustainability initiatives they follow.

3. Are there any disadvantages to choosing an eco-friendly bathtub?

While eco-friendly bathtubs are designed to minimize their environmental impact, they may have a higher initial cost compared to traditional tubs made from less sustainable materials. Additionally, some options may have limited design choices available.

4. Can I still enjoy luxury and comfort with an eco-friendly bathtub?

Absolutely! Many manufacturers offer luxurious and comfortable options in their range of eco-friendly bathtubs. You can find models with ergonomic designs, built-in features like heated surfaces or jets for relaxation while minimizing harm to the environment through their sustainable construction and water usage practices