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The idea that powdered detergents are bad for septic systems has come up twice in the last couple of weeks and although I didn’t believe it I had to do some research to back up my disbelief. What did I find out? Professionals tell septic system owners that powdered detergents (laundry and dishwashing) will clog their tanks and this is a MYTH, well sort of. After reading up on it I realized it is not a difference between powder and liquid detergents, it is about natural/biodegradable ingredients vs. chemical/petroleum based ingredients. And it is about the fillers and additives. The professionals need to give a more detailed explanation before spreading this MYTH. And consumers need to dig a little deeper into their cleaning product ingredients because labels and product marketing can be very misleading and confusing. A little background if you are not familiar with septic systems A septic system, in partnership with ground soil and bacteria, works to filter waste water before it returns to the groundwater. A septic system needs the right balance of water, pH, and bacteria to keep the system healthy. Any disruption to this process could damage the health and structure of a septic system and pollute the surrounding ecosystem.
So how was this MYTH created? "Traditional" powdered detergents, compared to liquid, contains more fillers and additives. These fillers could be composed of anything, clay, granulated plastics, or other petroleum based ingredient that does not biodegrade or dissolve in water. These non-biodegradable ingredients will build up in the top layer of scum that also contains oils, fats, hair, and possibly paper products. A small scum layer is important and beneficial to the health of a tank, it acts as a seal to keep the air out and provides protection to the good bacteria, but if it becomes too large it will create clogging problems. "Traditional" liquid detergents will also have these non-biodegradable ingredients that do harm to septic tanks. Using liquid instead of powder detergent will not protect the health of a septic system if non-biodegradable and harsh chemicals are still being used. In conclusion to my quick, down and dirty research, don't worry about your preference between liquid and powder cleaners when considering the health of your septic system. Do not pay attention to all the flashy marketing and greenwashing. Pay attention to the ingredients and always choose biodegradable. Reading labels can get confusing and overwhelming because of all the variations in chemical names. Companies try to sneak in all those nasty fillers and additives using a variety of names. Environmental Working Group is a great resource to check the safety of ingredients in any household or body care product you are considering purchasing. I use this website all the time when researching new products. They also have an app to put on your phone to use while on the go and shopping. https://www.ewg.org/ Never choose these ingredients!
Let's talk Surfactants The word surfactant means surface active agent. Surfactants help to repeal dirt from a surface. There are both natural/biodegradable and man-made/chemical surfactants. This was news to me because I thought the term surfactants was something bad and was a warning sign to stay away from that product. In its pure form, washing soda is a surfactant. Okay, I just dipped my toes too deep into the chemistry (chemistry killed my dream of a biology degree) of surfactants and got overwhelmed! Here are a couple of websites I found that explains surfactants: https://www.safehouseholdcleaning.com/anionic-nonionic-surfactants/ and https://www.ipcol.com/blog/an-easy-guide-to-understanding-surfactants/ Feel free to explore and learn more details about surfactants all you want!
And we should talk about SUDS!- yay, more chemistry!  HE washing machines and septic systems hate excessive suds and having foaming bubbles don't make clothes any cleaner. For those that have already switched to natural cleaning and body care products you may have noticed less suds in your life and you and your home are just as clean and happy without all that foaming action. SLS- Sodium Laureth Sulfate is a foaming agent. SLS is bad for your health, your septic tank, and the environment. Just take my word for it because I really don't want to learn and explain the chemistry on this one! Always choose biodegradable ingredients!
I decided to dig deeper into the individual ingredients of Molly’s Suds to learn their affects to a septic system. Magnesium Sulfate (Epsom Salts): removes buildup in fibers and helps keep washing machines smelling clean. Epsom salt is only mildly acidic and will not affect the pH balance of a healthy septic system. It will work as a fertilizer in the leaching field. Sodium Bicarbonate (Baking Soda): Molly’s Suds uses aluminum-free and food-grade quality. It reduces odor causing bacteria and sudsing (remember sudsing is BAD) and is a gentle cleanser. A septic system will benefit from the addition of baking soda. Baking soda is used as a natural, biodegradable alternative to synthetic, harsh chemicals and will help keep a septic tank from clogging without the harsh chemicals that kill off all the good bacteria. Sodium Carbonate (washing soda, soda ash): Molly’s Suds uses a sustainably sourced, pure product that is safe to use as medicinal and food ingredients. It is used to remove stains and is a natural, biodegradable alternative to chemical surfactants. It is also used as a natural water softener to boost the cleaning power of the other ingredients Sea Salt: used to prevent clumping. A natural, safe alternative to borax. There are many differing opinions on whether borax is safe. Other References https://www.thespruce.com/best-laundry-detergents-for-septic-systems-2146618 https://thetoiletzone.com/septic-safe-laundry-detergent/ https://advancedsepticservicesfl.com/septic-safe-laundry-soap-dishwashing/ https://martinseptic.com/which-laundry-detergents-are-safe-for-septic-system/ https://www.hunker.com/13408564/the-best-detergent-cleaning-product-for-septic-tanks https://flohawks.com/is-your-soap-damaging-your-septic-system/ https://mollyssuds.com/ Bonus tip: Regularly use baking soda, vinegar, and hot water to keep your drains clean. Chemical drain cleaners will kill all the good bacteria in your septic tank.
22 Comments
Millie Engstrand
11/14/2019 05:08:47 pm
Thank you Karen. I love Mollie’s Suds. I use vinegar and baking soda also. I clean my drains once monthly with baking soda and vinegar and hot water. My pipes are almost a century old. They are better than they were 30 years ago. 6/24/2020 09:33:12 am
Good article. I can see you have done your research! The bacteria that is present in septic tanks is key to breaking down the waste contained within. So yes, we need to be very careful about what we use and what ends up in the tank. It can cause damage and repair or replacement could be costly. 6/28/2020 09:35:53 pm
I have been planning to have a septic tank installed in my newly constructed apartment building. I'm glad you shared this because I never knew that the septic tank will require the right balance of PH, balance, and water. It's no wonder that some tanks are being damaged, due to too much usage of harsh chemicals. 11/24/2020 02:32:25 am
Thank you sharing useful information for us. i always read your blog. 4/16/2021 11:38:22 am
Thank you for helping me to understand that a septic system utilizes bacteria to help turn wastewater into something that can be used again. It seems like a septic system would be most useful on rural property because it seems like it requires a good amount of space to be effective. How much space does a septic system require in order to be most efficient? 5/7/2021 08:48:15 am
It's great that you talked about detergents and their effect on septic tanks. Recently, my wife and I moved into another house, and we just found out it came with a septic system. We're not familiar with septic systems, and we're worried about damaging ours, so we'll be sure to read your piece thoroughly. Thanks for the information on how a septic system works. 11/1/2021 04:56:18 pm
Thanks for pointing out that it doesn't matter if the cleaner is liquid or powder for the septic system. With that in mind, I will just make sure that I hire reputable septic cleaning services. We just need the system to be maintained now that we have been in this house for three years now, so there must be cleaning neededby now. 11/1/2021 10:08:24 pm
Looking for forward to finding out additional from you afterward 11/1/2021 10:14:11 pm
Very interesting details you have observed, thank you for putting up. 11/9/2021 04:56:00 pm
I like what you said about using sodium carbonate to clean the tank. My septic tank hasn't been cleaned in 4 years. I'll have to hire a plumber to pump out the sludge. 12/16/2021 06:26:27 am
I want to make sure that I take good care of my septic system. It makes sense that I would want to ensure that the right cleaning supplies are used. It might be smart for me to get a professional to help me out with this. Thanks for helping me understand that a septic system has to have the right balance of water, pH, and bacteria to ensure that it is in great condition. I will make sure that I will have professionals checking the unit once we have one installed for our new home. It will give us peace of mind that it will work well for a long time which will prevent issues that can also affect our health. 8/1/2022 08:28:55 pm
It never occurred to me that the type of detergent we use can impact our septic system. My dad mentioned that his septic pipes have been backed up. Since he uses powder detergent, maybe I can recommend him to stop using it and opt for liquid detergent instead. 9/1/2022 11:17:14 pm
I was captured when you discussed that a septic system functions to filter wastewater before it returns to the groundwater. My friend told me that their septic system is clogging. I think it's time for her to call a septic tank service to prevent further damage. 9/29/2022 11:10:45 pm
Nice post keep it up, Sep-Tech is owned by Joe Reed, who is proud to be the person who answers every phone call and provides the service to all of his loyal customers. Joe has worked extremely hard to make Sep-Tech what it is today and would like to thank all his customers who have hired him for either one job or multiple service calls. 10/4/2022 04:55:12 pm
I like the tip you gave about how the filters work for the septic to partner the soil and bacteria for the groundwater. After moving to our current area, we noticed that we are having problems with our septic tank because it cannot support the addition of our bathrooms, and we don't have any idea why. Thank you for the tips on how we can solve the problem. We will consider consulting a trusted septic tank installation service as they can help us with our concerns. 10/10/2022 01:54:18 pm
I didn't know that baking soda could help purge the odor. My septic tank seems to have a leak. I'll have to hire a plumber to patch it up. 10/26/2022 06:21:19 pm
It's great that you pointed out that using liquid detergent in place of powder won't prevent a septic system from damage if harsh, non-biodegradable chemicals are still being used. I recently moved into a new home and want to install a septic system there. I'll make a call to the septic tank services to have one installed in my home, and will apply your advice to maintain the health of my septic tank. Leave a Reply. |
Author: Karen West
Exploring and learning all things sustainability as a small retail business owner in Homer, AK. Archives
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