9 Best Laundry Detergent For Septic Systems

Which are the best laundry detergent for septic tanks? Let’s find out the best septic-safe laundry detergent brands.

When your home isn’t connected to a central sewer system, the only option you’re left with is an onsite waste treatment system; the septic system.

Unlike the sewer system where sewage is treated centrally, more responsibilities regarding the condition of your sewage system lie on you.

In other words, you’ll need to be wary of what goes into your septic system.

There are lots of items that shouldn’t go into a septic system. A few of them include hair, cigarette butts, condoms, disposable diapers, sanitary napkins & tampons, trash, handi-wipes, grease, and so on.

Even the type of detergent used for laundry matters a lot.

How so? All drainage points in a home are channeled to the septic tank. Now, there are millions of bacteria within your septic tank that help break down waste.

These could be harmed when you flush certain types of laundry detergent products down your drain.

How Laundry Detergents Affect Your Septic System

What type of laundry detergent do you use? Certain laundry detergents are known to be harmful to beneficial bacteria found within septic tanks. These bacteria act on organic waste by breaking these into simple components.

Without them, wastewater treatment will be impossible.

Now, laundry detergents are known to contain different chemical ingredients that could prove lethal to digestive bacteria in septic tanks. The culprits are mostly bleach, phosphates, or nonylphenol ethoxylate.

These are found in a lot of laundry detergents.

So, how best do you go about preventing these harmful bacteria from getting into your septic tank? It’s easy! You’ll have to stop using them! Stop using laundry detergents completely? Not at all!

There are fewer harmful laundry detergents designed with your septic system in mind.

Use Only Septic-Safe Laundry Detergents

Thankfully there are quite a lot of septic-safe laundry detergent products available today.

With these, you won’t have to fear your septic system’s condition. These have been specially formulated to exclude harmful chemicals such as those mentioned earlier.

Will I still get brilliant laundry results with their use? Absolutely! We’ve included a list of septic-safe laundry detergents that are free from toxic chemicals harmful to septic tank bacteria.

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You only need to pick any of those listed below to keep your septic system functional.

Septic-Safe Laundry Detergents To Buy

Several high-quality septic-safe detergents are available and can be easily bought from stores.

Some of them include Arm & Hammer Plus OxiClean Odor Blasters, ECOS Liquid Laundry Detergent, Solimo Concentrated Liquid Laundry Detergent, and Seventh Generation Free & Clear Laundry.

Other quality septic-safe detergent products include Method Free + Clear Laundry Detergent, Method Concentrated Laundry Detergent, Charlie’s Soap Laundry Powder, and Dropps Stain & Odor Laundry Detergent Pod. Ecover Laundry Detergent is another product you should try out.

  • Arm & Hammer Plus OxiClean Odor Blasters Laundry Detergent

Is Oxiclean safe for septic systems? Yes.

With this detergent product, you get many benefits ranging from a long-lasting scent to a great wash with odor elimination properties. Of more importance to us is its septic-safe formulation.

This means you can use this product without fear of harming septic tank bacteria.

  • ECOS Liquid Laundry Detergent

ECOS is a liquid detergent that’s specially formulated to be environmentally friendly. This plant-powered product when used in homes with septic systems poses no problems whatsoever.

What more? Harmful chemicals like phthalates, dyes, phosphates, and parabens are left out.

These will easily harm useful bacteria when included.

  • Solimo Concentrated Liquid Laundry Detergent

This is a super-concentrated liquid laundry detergent that comes in lavender, free clear, fresh scent, and clean-linen variants among others.

Solimo detergent can be used with zero fear of harming microorganisms in your septic tank. You only need to use it as instructed for the best results.

  • Seventh Generation Free & Clear Laundry Detergent

Starting at $11.32, the Seventh Generation detergent works excellently to get rid of tough stains. Your septic system is free from any adverse effects of its use because it doesn’t contain harmful chemicals.

This detergent excludes artificial brightening chemicals as well as dyes and fragrances. Without these, there’s no fear for your septic system.

  • Method Free + Clear Laundry Detergent

Another septic-safe laundry detergent you can use is the Method Free + Clear.

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It’s a high-efficiency laundry product that serves all your basic laundry needs while being free of fragrances, environmentally friendly, and free of dye.

Asides from protecting your fabrics, it also poses no harm to septic tank bacteria.

  • Method Concentrated Laundry Detergent

Keep your septic tank functional by using a product that’s confirmed to be septic-safe. Plus, you also get all the benefits of an excellent laundry detergent.

These are all the perks associated with using Method Concentrated Laundry detergent. It comes in concentrated liquid form which is gentle on skin and clothes.

  • Charlie’s Soap Laundry Powder Detergent

Are you looking for a green laundry detergent that won’t pose any harm to your septic system? Charlie’s Soap Laundry detergent powder provides all of that. It is designed to be fragrance-free.

More important is the fact that it’s 100% safe to use in septic systems with no adverse effect whatsoever.

  • Dropps Stain & Odor Laundry Detergent Pod

Dropps is made from natural plant-based ingredients proven to be totally safe for septic system use. It comes in pod form and is free from parabens, phosphates, and dye.

This is an environmentally-centered product that comes in compact packaging. With Dropps, you get value for money while keeping your septic systems safe.

  • Ecover Laundry Detergent

This is another plant-based septic-safe laundry detergent product you can trust for all your laundry needs. It’s designed to be biodegradable and will easily handle all sorts of tough stains to give you excellent laundry results.

It comes in liquid concentrates which are applied to laundry in dosages.

These are only a few products among several known to be septic-safe and will readily get rid of all stains and dirt. The best part is, digestive bacteria within your septic tank aren’t impacted negatively.

This enhances the breakdown of waste without any problems.


The septic-safe laundry detergent products listed above offer you options. You’re spoiled for choice because each of these products offers excellent laundry results and septic system protection.

There are also some brands of septic-safe shampoos and soaps that you should consider.

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