My recent greywater research is part of a homestead greywater feasibility study and focuses on two things: analyzing the greywater safeness of the products I currently use, and looking for locally available, affordable alternatives if needed. In this post I'll share what I've learned about the products I use. I try to be conscientious about what I use, so I was hoping they'd also be safe for greywater usage.
I focused on my three main concerns: pH, sodium, and boron (although read part one to see why I'm only nominally concerned about pH and boron.) There may be other problems with these products, for example health and environmental concerns, but in context this post only focuses on those three because of how they effect my greywater.
The biggest problem with analyzing cleaning products is ingredient labels, or rather lack of. Very few manufacturers give a detailed list of actual ingredients. Mostly they use advertising terms instead, things like "natural," "biodegradable" or "phosphate free." They rarely tell what's actually in the product. Thanks to the internet, I found much of this information online.
Following is a list of the products I use, their ingredients, anything else I learned about them, cost per use if applicable, and any concerns I have.
Laundry. I use either homemade laundry detergent or Charlie's Liquid Laundry Detergent. I don't use laundry softeners, stain removers (other than rubbing the stain with a bar of soap), or bleach.
Homemade laundry detergent:
- washing soda (sodium carbonate)
- borax (boron)
- and either Fels-Naptha laundry bar or Zote bar soap
- Fels-Naptha
- sodium tallowate (beef tallow), sodium cocoate (coconut oil), sodium palmatate kernalate (palm kernel oil), and/or sodium palmate (palm oil)
- water
- talc
- dipentene coconut acid, palm acid, and/or palm acid
- peg-6 methyl ether
- glycerine
- sodium chloride (salt)
- pentasodium pentetate and/or tetrasodium etdronate
- titanium oxide (whitener)
- tricloroban (antibacterial agent)
- fragrance
- acid orange 24 and yellow 73
- or Zote
- Sodium tallowate
- Sodium cocoate
- Fragrance (citronella oil)
- Optical brighteners
- Dye (pink and blue bars only)
Cost per load: about $0.10.
Laundry water pH - I'm out at the moment so I don't know. Probably basic because based on what I read, liquid soaps and detergents tend to be neutral, solid soaps (bars and powders) are alkaline.
Concerns: Even without knowing exactly what all these chemicals are, I see "sodium" popping up everywhere, plus the boron. The whiteners, antibacterials, and coloring agents in the bar soaps are also a concern. If I do continue to make homemade laundry powder, I'll likely switch to homemade soap.
Charlie's Liquid Laundry Detergent
- Water
- Sodium carbonate (washing soda)
- C12-15, Pareth-2 (biodegradable vegetable and mineral sourced surfactants)
Cost per load: for the 1-gallon size, less than $0.13
Laundry water pH - 7 (neutral), although the straight product is highly alkaline.
Concerns: The sodium of course. Also, there is some argument around the internet about the C12-15, Pareth-2. These are used in some Seventh Generation products which might lend a sense of credibility, but, on the other hand, Seventh Generation products are not considered greywater safe. I would like to further investigate the criticism over the surfactants.
Dishwashing. I've been using old-fashioned non-concentrated, Simply Clean original scent Dawn. Dawn is made by Procter & Gamble, who boast that "Dawn helps save wildlife," because it is used to safely bath animals rescued from oil spills. (Click that link for more information.) Sounds good, but does being safe to bath animals mean Dawn is safe to feed plants?
Finding an ingredient list was not easy. The only thing the label tells me is that it contains biodegradable surfactants and no phosphates. I finally tracked down a P&G MSDS for Dawn Simply Clean Original and discovered it contains this:
- Sulfuric acid
- mono-C10-16-alkyl esters
- Amine oxides
- C10-16-alkyldimethyl Poly(oxy-1,2-ethanediyl)
- alpha-sulfo-omega-hydroxy-
- C10-16-alkyl ethers
- sodium salts
pH - neutral
Cost per use - I haven't tried to figure that one out
Concerns: although the amount of sodium appears to be small, my biggest question is whether these chemicals are petroleum based (as are many synthetic chemicals).
Cleaning. I use vinegar, dish soap, elbow grease, hydrogen peroxide, and a DIY scrubbing powder that I've really liked. Unfortunately it contains equal parts of:
- table salt (sodium chloride)
- washing soda (sodium carbonate)
- borax (boron)
All huge no-nos! While small amounts of the washing soda and borax may not be too bad, pouring table salt on my garden doesn't seem like a good idea. The other scrubbing powder I keep on hand is Bon Ami Powder Cleanser. It contains:
- Limestone
- Feldspar
- Surfactant from coconut and corn oil
- Soda ash (washing soda or sodium carbonate)
- Baking soda (sodium bicarbonate)
Concerns: Soda ash and baking soda are listed last on the label, so at least I know they contain less sodium than my homemade scrubbing powder.
Bath Soap. I've used Ivory bar soap for a long time, recently found Clearly Natural bar soap, and also use some homemade soaps.
Ivory
- sodium tallowate (beef tallow) and/or sodium palmate (palm oil)
- water
- sodium palm kernelate (palm kernel oil), and/or sodium cocoate (coconut oil)
- fragrance (in the aloe scented bars)
- sodium chloride (salt)
- glycerin
- coconut acid
- palm kernel acid
- tallow acid
- palm acid
- citric acid
- sodium citrate
- tetrasodium (water softener)
- aloe barbadensis leaf extract
Clearly Natural Soap
- Glycerine
- sodium stearate and sodium oleate (saponified coconut, palm and/or palm kernel)
- decyl glucoside (vegetable-derived surfactants)
- propanediol and sorbital (humectants)
- sodium citrate
- Fragranced versions contain a blend of natural aromas and essential oils
Homemade soaps - These basically contain fat and lye, which undergo a chemical process called saponification to make what we know as soap. According to the Caveman Chemist (interesting article here) saponification produces fatty acids, the names of which are all sodium somethingorotherate. The bottom line is that homemade soaps contain sodium and are alkaline (although aging the bars has something to do with how alkaline).
Concerns: are the same as for everything else, but honestly, I don't think I'm doing terrible bad on this one.
Shampoo - I just buy the junky stuff for dry hair because it's cheap. Ditto for conditioner. Shocking, I know.
Miscellaneous - Then there are all the little things that go down the drain, which may or may not be of concern. I'm not listing all of them, but am discovering that once I started analyzing this way, I realized that anything that goes on our bodies, ends up getting washed off.
- Body care: Things like facial care, salves, and lotions. I have very dry skin so I like to keep lotion around. I make some of my own but also buy Burt's Bees products (of which some are considered greywater safe by the experts).
- Deodorant: Yeah, even that gets washed off with a residue going down the drain. I've been using a deodorant stone for years. These are made of mineral salts (back to the salt again), although the synthetic ones are not pure.
- Toothpaste: Another one I wouldn't have thought of. My current toothpaste is also homemade. I got the recipe from this website:
- 1/4 cup eggshell powder (I use shells from hard boiled eggs, drying thoroughly)
- 2 tbsp coconut oil (which is liquid in summer and solid in winter)
- 1 tbsp baking soda (sodium bicarbonate)
- a few drops of essential oil if desired (usually peppermint)
All in all, I'd have to say I don't think I'm doing too badly. One thing I'm learning is that there are no perfect cleaning products.
Interested in seeing what's in the products you use? You can either try to track them down with numerous searches like I did, or try these sites (which I discovered after all my research).
They don't contain some of the newer natural products that are out, but they're a good starting point for doing your own research.
In my next post I'll share what products I can buy locally that are more greywater friendly. Click here to read it.
© July 2016 by Leigh at http://www.5acresandadream.com/