Best Laundry Detergent for Septic Systems and Greywater in Australia

Best Laundry Detergent for Septic Systems and Greywater in Australia

When it comes to cleaning products like laundry detergents and dishwasher liquids, Australian households with septic systems and those using greywater for their gardens face a unique challenge. The choice of detergent is crucial, as the wrong type can harm these systems and the environment.

In this comprehensive guide, we'll explore the best laundry detergent for these purposes, with a special focus on the eco-friendly and innovative Sheet Yeah! Laundry Detergent Sheets.

Understanding septic systems and greywater

Grey Water Septic system 2 cement tanks for treating waste water

Septic systems are underground wastewater treatment structures, common in rural areas without centralised sewer systems. They use a combination of nature and technology to treat household wastewater from bathrooms, kitchen drains, and laundry.

Greywater, on the other hand, is relatively clean waste water from baths, sinks, dishwashers, washing machines, and other kitchen appliances. It's often reused for gardening.

Currently, 1.4 million Australian homes use secondary wastewater treatment systems. About 500,000 of them are in Queensland. 

Using harsh chemicals such as chlorine bleach in cleaning products can disrupt the delicate balance in septic systems and harm the environment when greywater is repurposed or makes its way into nature's waterways.

Greywater System showing how water is collected and treated

What is a septic safe laundry detergent?

A septic safe laundry detergent is specifically formulated to be safe for use with septic systems. It does not contain harsh ingredients or chemicals that could harm the delicate balance of bacteria in the septic tank.

Factors to consider when choosing laundry detergent 

When selecting a laundry detergent for septic systems and greywater usage in Australia, consider these factors:

  • Biodegradability: The detergent should break down naturally without leaving harmful residues.
  • Phosphate-Free Formula: Phosphates can lead to algal blooms in water bodies, disrupting ecosystems.
  • Low Sudsing Properties: Excessive suds can cause problems in septic systems and greywater treatment.
  • Bleach and Synthetic Fragrance Free: Bleach is harsh on the delicate ecosystem, while synthetic fragrances are made up of undisclosed chemicals that can disrupt the microbial balance in septic tanks, leaving you with costly repair bills and smelly waste water.
Unbalance Grey water Septic system hash chemicals

The impact of laundry detergents on septic systems

Laundry products can significantly impact the health of septic systems. Chemicals in traditional cleaning products such as detergents, enzymes and bleach can kill the beneficial bacteria that break down waste, leading to system failures and environmental pollution.

Similarly, greywater systems, which repurpose water for gardening, can suffer from the toxic runoff of these detergents. The need for a septic-safe, eco-friendly detergent is not just a preference but a necessity for the health of these systems and the environment.

The best laundry detergent for septic systems and grey water in Australia

Sheet Yeah! laundry detergent sheets: A game changer

Sheet Yeah! Laundry Detergent Sheets are an innovative product designed with the health of septic systems and the environment in mind. These sheets are biodegradable, bleach & phosphate-free, low-sudsing, and come in either unscented or Summer Daze which is fragranced with only natural essential oils making them an ideal choice for Australian households.

They dissolve easily, leave no residue, and most importantly, are gentle on the environment.  


Comparison with traditional detergents

Traditional cleaning products often contain harsh chemicals, high levels of phosphorus and synthetic fragrances that can damage septic systems and pollute greywater. In contrast, Sheet Yeah! is formulated to be gentle on the environment while still providing effective cleaning.

Sheet Yeah! Laundry Detergent Sheets also lead when it comes to packaging, compared to your bulky traditional detergents bottles these dissolvable soap sheets win hands down arriving in a compact 100% plastic free cardboard pack that makes them a great zero waste choice that reduces the products carbon footprint by 94%.




User experiences and reviews

Many Australians have already switched to Sheet Yeah! citing its effectiveness and eco-friendliness. Reviews often highlight the ease of use of Sheet Yeah! and its positive impact as an eco cleaner on septic systems and greywater usage as well as 

"Love these, have tried both scented and unscented. I have excema and since using these have no allergic reaction . First purchased about 6 months ago and just got my second order. Recommended to my parents as dad also has skin allergies, they love it too. Happy customer . Thanks guys." - Julie D

"I would 100% recommend Sheet Yeah…smells amazing, leaves ur clothes feeling amazing and just over all an amazing product! Our septic system loves us for it!  The people who created Sheet Yeah are amazing to…sooooo HAPPY with EVERYTHING about this product!!!! 10/10" - Gemz C

"I tried these laundry sheets this morning for the first time! The laundry smelt amazing. The best part for me is knowing that they are natural and no harsh chemicals. The second best part is that they are so easy to use and no mess. The third part is that one small packet can last so many washes! Now, I literally can't wait to do my washing, so that I can use them again! What a great invention!!!" - Diana A


Customer Review no allergic reaction for excema happy customer

Advantages of Sheet Yeah! for septic systems

Sheet Yeah!, a eco-friendly laundry liquid, offers several benefits for septic systems and is free from harmful compounds like chlorine and phosphorus.

  • Safe for Bacteria: It doesn't harm the beneficial bacteria in septic tanks.
  • Environmentally Friendly: Fully biodegradable with no harmful residues.
  • Efficient Cleaning: Effective in removing dirt and stains without harming the system.
  • Plant-based formula thats planet-friendly and perfect for sensitive skin
  • Vegan and cruelty-free 
  • Strong cleaning power without harsh chemicals 

How to use laundry detergents effectively for septic systems

Effective use of laundry detergents is key to protecting your septic system.

Use the recommended amount – overuse can lead to excess suds and strain on the system. Opt for cold water washes to save energy and reduce the environmental impact. Regular maintenance of your septic system is also crucial to ensure its longevity and efficiency.

Cost effectiveness

Sheet Yeah! are comparable in price to many traditional detergents, but its long-term benefits for septic system health and the environment offer substantial savings.

Where to buy laundry detergent sheets in Australia

Sheet Yeah! Laundry Detergent Sheets are available on their website HERE in Australia and are also available on Amazon if you live in the USA HERE. Both sites offer a one off purchase or a subscription option for an easy set and forget solution to ensure you always have laundry detergent when you need it.

Common mistakes to avoid when using cleaning products

One common mistake is assuming all "green" or "natural" detergents are safe for septic systems. It's important to check the specific ingredients and properties. 


Choosing the right laundry detergent is essential for households with septic systems and greywater in Australia.

If you're looking for a eco-friendly laundry detergent thats safe for your septic tanks and won't cause harm to the beneficial bacteria in your septic system then Sheet Yeah! Laundry Detergent Sheets stand out as an effective, eco-friendly option that meets these specific needs.


FAQs about laundry detergent for septic systems

Q: Is Sheet Yeah! safe for all types of septic systems?

Yes, it's formulated to be safe for all septic systems.

Q: Can Sheet Yeah! be used for both coloured and white laundry?

Absolutely, it's suitable for all fabric types.

Q: How does Sheet Yeah! impact the environment compared to liquid detergents?

Sheet Yeah! an eco-friendly cleaner, has a significantly lower environmental impact, thanks to their plant-based ingredients, biodegradability, and zero-waste packaging, making them safe for septic systems and the environment.

Q: Are there any fragrances in Sheet Yeah?

It's available in both fragrance-free and Summer Daze which is scented with essential oils unlike other sheets which contain synthetic fragrances which are toxic to you, and your septic system.

Q: How long does a pack of Sheet Yeah! last compared to traditional detergents?

It depends on laundry frequency and size of load, but generally, it offers comparable longevity.

Q: How do you use Sheet Yeah! Detergent Sheets? 

Using Sheet Yeah! is simple: choose the amount based on the size of your load, and just place a half sheet or full sheet in the washing machine drum before adding clothes for front loader and on top of clothes in a top loader. The soap sheet dissolves completely during the wash cycle.   

Q: Can I use regular laundry detergent in a septic system?

A: It is recommended to use a laundry detergent specifically labeled as septic safe to ensure it does not contain any harmful chemicals that could disrupt the septic system.

Q: What is greywater, and why is it important for laundry detergents?

A: Greywater is wastewater generated from activities such as laundry, dishwashing, and bathing. It is important for laundry detergents to be safe for greywater as it can be reused for purposes like irrigation and flushing toilets.

Q: How to choose the best laundry detergent for septic systems and greywater?

A: Look for laundry detergents labeled as septic safe and greywater friendly. Consider products that are biodegradable, free from phosphates and chlorine, and have a neutral pH to ensure they are safe for both septic systems and greywater.

Q: Are there specific ingredients to avoid in laundry detergents for septic systems?

A: Avoid laundry detergents with high levels of phosphates, chlorine, and other harsh chemicals that can disrupt the balance of bacteria in the septic system. Look for products that use biodegradable and septic safe ingredients.

Q: Can septic safe laundry detergents effectively remove stains?

A: Yes, there are septic safe laundry detergents designed to effectively tackle stains while still being safe for septic systems and greywater. Look for products that are specifically formulated for stain removal.

Q: What is the significance of using eco-friendly laundry detergents for septic systems?

A: Eco-friendly laundry detergents are beneficial for septic systems as they minimize the impact of harmful chemicals on the environment and the septic tank. Choosing eco-friendly options also aligns with sustainable and responsible household practices.

Q: Does the amount of detergent used impact septic system health?

A: Yes, using excessive amounts of detergent can potentially harm the balance of the septic system. It is important to follow the recommended usage guidelines and use the appropriate amount of septic safe laundry detergent to maintain a healthy septic system.