Your septic tank probably isn't something you think about while doing the washing.
And honestly, that's probably a good thing. 😅
But if your home uses a septic system, or you reuse laundry water as greywater, what goes down the drain matters.
Every load of washing sends detergent and water into your wastewater system. Choosing the right laundry products and using the right amount can help you create a laundry routine that's kinder to your home, your wastewater system and the environment.
Here's what Australian households need to know.
First, What Does "Septic Safe" Actually Mean?
Unlike homes connected to a mains sewer system, a septic system treats household wastewater on your property.
Inside the system, microorganisms help break down waste.
That means it's important to be mindful of what you're regularly sending down the drain. Large amounts of unsuitable cleaning chemicals can interfere with how the system works.
The good news?
You don't need to completely rethink your laundry routine.
Choosing a laundry detergent that's suitable for septic systems, and using only as much as you actually need, is a great place to start.
And What Does "Greywater Safe" Mean?
Greywater is household wastewater that doesn't come from the toilet.
Depending on your home, this can include water from:
- Washing machines
- Showers
- Baths
- Bathroom basins
Some Australian households collect or divert greywater for reuse, particularly in the garden.
If your washing machine contributes to your greywater system, your choice of laundry detergent becomes especially important because whatever you add to your washing machine ends up in that water.
A quick note: Greywater use and requirements can vary between Australian states, councils and individual systems. If you're reusing laundry water around your home or garden, always follow your local guidelines and the instructions for your greywater system.
What Should You Look for in a Laundry Product?
There's no need to become a detergent scientist every time you shop.
But there are a few things worth considering.
1. Look for a Septic-Safe Product
The simplest place to start is checking whether the laundry detergent is specifically labelled or described as suitable for septic systems.
Resparkle Natural Laundry Powder is septic tank safe and greywater safe, making it suitable for households using these systems when used as directed.
2. Pay Attention to Phosphates
Phosphates have traditionally been used in some cleaning products to improve cleaning performance, but they can contribute to nutrient pollution when they enter waterways.
If wastewater impact matters to your household, choosing a phosphate-free laundry product is one simple change you can make.
Resparkle Natural Laundry Powder is phosphate free.
3. Choose a Concentrated Formula
More detergent doesn't automatically mean cleaner clothes.
In fact, using too much can mean more detergent residue on your clothes, inside your washing machine and ultimately entering your wastewater.
A concentrated formula allows you to use a smaller amount while still getting the cleaning performance you need.
4. Follow the Recommended Dose
This one is surprisingly important.
It's tempting to add an extra scoop when you've got a particularly dirty load.
But your laundry doesn't always need more detergent.
Using the recommended amount means less unnecessary product going into your washing machine, and from there, into your septic or greywater system.
For stubborn stains, you're often better off treating the stain directly rather than adding more powder to the entire load.
Meet Resparkle Natural Laundry Powder
We wanted our Natural Laundry Powder to deliver a powerful clean while fitting naturally into a more conscious household routine.
It's septic tank safe and greywater safe, concentrated and formulated without phosphates.
Its formula includes:
Sodium Carbonate - EWG Rating 1
A cleaning agent that helps lift everyday dirt and grime.
Sodium Percarbonate - EWG Rating 1
Supports the powder's cleaning performance.
Coconut-Derived Surfactant - EWG Rating 1
Helps lift dirt and oils so they can be washed away.
Sodium Carboxymethyl Cellulose - EWG Rating 1
Helps with stain removal and keeping loosened dirt from settling back onto fabrics.
Sodium Metasilicate Pentahydrate - EWG Rating 2
A builder that supports cleaning performance.
Sodium Citrate - EWG Rating 1
A chelating agent that helps the detergent work effectively in water.
Natural Enzyme Blend - EWG Rating 1
Helps break down common protein and starch-based stains.
Our scented formula also contains an essential oil blend, while a Fragrance Free option is available for households that prefer their laundry without added scent.
No need for a complicated ingredient list. Just a hardworking formula designed to get on with the washing.
5 Easy Habits for a More Septic & Greywater-Friendly Laundry
Choosing the right detergent is only one part of the picture.
A few simple laundry habits can help too.
1. Don't Overdose Your Detergent
Start with the recommended amount.
More powder isn't necessarily going to give you a better clean, and it means more product entering your wastewater.
2. Treat Stains Where They Are
Got a stubborn coffee, food or grass stain?
Rather than adding another scoop of detergent to the whole wash, treat the stain directly before washing.
Our Universal Stain Remover can be used to pre-treat stubborn laundry stains before your normal wash.
3. Wash Full Loads Where Possible
Waiting until you have a full load can reduce the number of wash cycles your household runs, saving water and energy along the way.
Just don't pack your machine too tightly, your clothes still need room to move.
4. Spread Your Washing Out
If you have a septic system, running multiple washing-machine loads one after another can send a lot of water into the system at once.
Where practical, spreading loads throughout the week can help avoid sudden large volumes of wastewater entering your septic system.
5. Know Where Your Greywater Goes
If you're reusing laundry water, know where it's being directed and follow the requirements for your particular system and local area.
Simple, but important.
A Better Laundry Routine Doesn't Need to Be Complicated
Being more mindful about what goes down the drain doesn't mean you need a completely different way of doing laundry.
- Start small.
- Choose a laundry powder suitable for your wastewater system.
- Use the recommended amount.
- Treat stubborn stains instead of automatically adding more detergent.
- Wash full loads where practical.
And if you reuse greywater, understand where that water is going.
Small everyday choices can add up to a laundry routine that's better suited to your home and a little kinder to the environment too.
Laundry That's Kinder Beyond the Washing Machine
Clean clothes are only part of the story.
Choosing a septic tank safe and greywater safe laundry powder means thinking about where your wash water goes once the cycle finishes too.
Resparkle Natural Laundry Powder gives you powerful everyday cleaning in a concentrated, phosphate-free formula that's suitable for septic tanks and greywater systems when used as directed.
Clean clothes. A simpler routine. And a little more thought about what goes down the drain.
Frequently Asked Questions
Is laundry powder safe for septic tanks?
Some are and some aren't, so check the individual product rather than assuming all powders are suitable. If your home uses a septic system, look for a laundry detergent that's specifically identified as septic safe and follow its dosing instructions.
Is Resparkle Natural Laundry Powder septic tank safe?
Yes. Resparkle Natural Laundry Powder is septic tank safe when used as directed.
It's also phosphate free and concentrated, so you only need the recommended amount for each wash.
Is Resparkle Natural Laundry Powder greywater safe?
Yes. Resparkle Natural Laundry Powder is greywater safe when used as directed.
If you reuse washing-machine water around your property, remember that greywater requirements vary depending on your location and system. Always follow your local regulations and greywater-system instructions.
Can I use washing-machine water on my garden?
Laundry water can form part of a household greywater system, but where and how it can be reused depends on your location, the plants involved and your particular system.
Check your state or local council guidance before using laundry greywater in the garden.
Does using more laundry powder make clothes cleaner?
Not necessarily.
With a concentrated formula, using more than the recommended amount can simply mean more detergent going into the wash. Start with the recommended dose and pre-treat stubborn stains separately when needed.