There are ‘forever chemicals’ in our drinking water. Should standards change to protect our health?
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Today’s news coverage reports potentially unsafe levels of “forever chemicals” detected in drinking water supplies around Australia. These include human-made chemicals: perfluorooctane sulfonate (known as PFOS) and perflurooctanic acid (PFOA). They are classed under the broader category of per- and polyfluoroalkyl substances or PFAS chemicals.
The contaminants found in our drinking water are the same ones United States authorities warn can cause cancer over a long period of time, with reports warning there is “no safe level of exposure”.
In April, the US Environmental Protection Agency (USEPA) sent shock waves through the water industry around the world when it announced stricter advice on safe levels of PFOS/PFOA in drinking water. This reduced limits considered safe in supplies to zero and gave the water industry five years to meet legally enforceable limits of 4 parts per trillion.
So, should the same limits be enforced here in Australia? And how worried should we be that the drinking in many parts of Australia would fail the new US standards?
What are the health risks?
Medical knowledge about the human health effects of PFOS/PFOA is still emerging. An important factor is the bioaccumulation of these chemicals in different organs in the body over time.
Increased exposure of people to these chemicals has been associated with several adverse health effects. These include higher cholesterol, lower birth weights, modified immune responses, kidney and testicular cancer.
It has been very difficult to accurately track and measure effects of different levels of PFAS exposure on people. People may be exposed to PFAS chemicals in their everyday life through waterproofing of clothes, non-stick cookware coatings or through food and drinking water. PFAS can also be in pesticides, paints and cosmetics.
The International Agency for Research on Cancer (on behalf of the World Health Organization) regards PFOA as being carcinogenic to humans and PFOS as possibly carcinogenic to humans.
Our guidelines
Australian drinking water supplies are assessed against national water quality standards. These Australian Drinking Water Guidelines are continuously reviewed by industry and health experts that scan the international literature and update them accordingly.
All city and town water supplies across Australia are subject to a wide range of physical and chemical water tests. The results are compared to Australian water guidelines.
Some tests relate to human health considerations, such as levels of lead or bacteria. Others relate to “aesthetic” considerations, such as the appearance or taste of water. Most water authorities across Australia make water quality information and compliance with Australian guidelines freely available.
What about Australian PFOS and PFOA standards?
These chemicals can enter our drinking water system from many potential sources, such as via their use in fire-fighting foams or pesticides.
According to the Australian Drinking Water Guidelines, PFOS should not exceed 0.07 micrograms per litre in drinking water. And PFOA should not exceed 0.56 micrograms per litre. One microgram is equivalent to one part per billion.
The concentration of these chemicals in water is incredibly small. And much of the advice on their concentration is provided in different units. Sometimes in micrograms or nannograms. The USEPA uses parts per trillion.
In parts per trillion (ppt) the Australian Guidelines for PFOS is 70 ppt and PFOA is 560 ppt. The USEPA’s new maximum contaminant levels (enforceable levels) are 4 ppt for both PFOS and also PFOA. Previous news reports have pointed out Australian guidelines for these chemicals in drinking water are up to 140 times higher than the USEPA permits.
Yikes! That seems like a lot
Today’s news report cites PFOS and PFOA water tests done at many different water supplies across Australia. Some water samples did not detect either chemicals. But most did, with the highest PFOS concentration 15.1–15.6 parts per trillion from Glenunga, South Australia. The highest PFOA concentration was reported from a small water supply in western Sydney, where it was detected at 5.17–9.66 parts per trillion.
Australia and the US are not alone. This is an enormous global problem.
One of the obvious challenges for the Australian water industry is that current water treatment processes may not be effective at removing PFOS or PFOA. The Australian Drinking Water Guidelines provide this advice:
Standard water treatment technologies including coagulation followed by physical separation, aeration, chemical oxidation, UV irradiation, and disinfection have little or no effect on PFOS or PFOA concentrations.
Filtering with activated carbon and reverse osmosis may remove many PFAS chemicals. But no treatment systems appear to be completely effective at their removal.
Removing these contaminants might be particularly difficult for small regional water supplies already struggling to maintain their water infrastructure. The NSW Auditor General criticised the planning for, and funding of, town water infrastructure in regional NSW back in 2020.
Where to from here?
The Australian water industry likely has little choice but to follow the US lead and address PFOS/PFAS contamination in drinking water. Along with lower thresholds, the US committed US$1 billion to water infrastructure to improve detection and water treatment. They will also now require:
Public water systems must monitor for these PFAS and have three years to complete initial monitoring (by 2027) […]
As today’s report notes, it is very difficult to find any recent data on PFOS and PFOA in Australian drinking water supplies. Australian regulators should also require ongoing and widespread monitoring of our major city and regional water supplies for these “forever chemicals”.
The bottom line for drinking tap water is to keep watching this space. Buying bottled water might not be effective (2021 US research detected PFAS in 39 out of 100 bottled waters). The USEPA suggests people can reduce PFAS exposure with measures including avoiding fish from contaminated waters and considering home filtration systems.
Correction: this article previously listed the maximum Australian Drinking Water Guidelines PFOA level as 0.056 micrograms per litre. The figure has been updated to show the correct level of 0.56 micrograms per litre.
Ian A. Wright, Associate Professor in Environmental Science, Western Sydney University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Dial Down Your Pain
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This is Dr. Christiane Wolf. Is than an MD or a PhD, you ask? The answer is: yes (it is both; the latter being in psychosomatic medicine).
She also teaches Mindfulness-Based Stress Reduction, which as you may recall is pretty much the most well-evidenced* form of meditation there is, in terms of benefits:
No-Frills, Evidence-Based Mindfulness
*which is not to claim it is necessarily the best (although it also could be); rather, this means that it is the form of meditation that’s accumulated the most scientific backing in total. If another equal or better form of meditation enjoyed less scientific scrutiny, then there could an alternative out there languishing with only two and a half scientific papers to its name. However, we at 10almonds are not research scientists, and thus can only comment on the body of evidence that has been published.
In any case, today is going to be about pain.
What does she want us to know?
Your mind does matter
It’s easy to think that anything you can do with your mind is going to be quite small comfort when your nerves feel like they’re on fire.
However, Dr. Wolf makes the case for pain consisting of three components:
- the physical sensation(s)
- the emotions we have about those
- the meaning we give to such (or “the story” that we use to describe it)
To clarify, let’s give an example:
- the physical sensations of burning, searing, and occasionally stabbing pains in the lower back
- the emotions of anguish, anger, despair, self-pity
- the story of “this pain has ruined my life, is making it unbearable, will almost certainly continue, and may get worse”
We are not going to tell you to throw any of those out of the window for now (and, would that you could throw the first line out, of course).
The first thing Dr. Wolf wants us to do to make this more manageable is to break it down.
Because presently, all three of those things are lumped together in a single box labelled “pain”.
If each of those items is at a “10” on the scale of pain, then this is 10×10×10=1000.
If our pain is at 1000/10, that’s a lot. We want to leave the pain in the box, not look at it, and try to distract ourselves. That is one possible strategy, by the way, and it’s not always bad when it comes to giving oneself a short-term reprieve. We balanced it against meditation, here:
Managing Chronic Pain (Realistically)
However, back to the box analogy, if we open that box and take out each of those items to examine them, then even without changing anything, even with them all still at 10, they can each be managed for what they are individually, so it’s now 10+10+10=30.
If our pain is at 30/10, that’s still a lot, but it’s a lot more manageable than 1000/10.
On rating pain, by the way, see:
Get The Right Help For Your Pain
Dealing with the separate parts
It would be nice, of course, for each of those separate parts to not be at 10.
With regard to the physical side of pain, this is not Dr. Wolf’s specialty, but we have some good resources here at 10almonds:
- The 7 Approaches To Pain Management
- 10 Tips To Reduce Morning Pain & Stiffness With Arthritis
- Science-Based Alternative Pain Relief: When Painkillers Aren’t Helping, These Things Might
When it comes to emotions associated with pain, Dr. Wolf (who incidentally is a Buddhist and also a teacher of same, and runs meditation retreats for such), recommends (of course) mindfulness, and what in Dialectical Behavior Therapy (DBT) is called “radical acceptance” (in Buddhism, it may be referred to as being at one with things). We’ve written about this here:
“Hello, Emotions”: Radical Acceptance In CBT & DBT
Once again, the aim here is still not to throw the (often perfectly valid) emotions out of the window (unless you want to), but rather, to neutrally note and acknowledge the emotions as they arrive, á la “Hello, despair. Depression, my old foe, we meet again. Hello again, resentment.” …and so on.
The reason this helps is because emotions, much like the physical sensations of pain, are first and foremost messengers, and sometimes (as in the case of chronic pain) they get broken and keep delivering the message beyond necessity. Acknowledging the message helps your brain (and all that is attached to it) realize “ok, this message has been delivered now; we can chill about it a little”.
Having done that, if you can reasonably tweak any of the emotions (for example, perhaps that self-pity we mentioned could be turned into self-compassion, which is more useful), that’s great. If not, at least you know what’s on the battlefield now.
When we examine the story of our pain, lastly, Dr. Wolf invites us to look at how one of the biggest drivers of distress under pain is the uncertainty of how long the pain will last, whether it will get worse, whether what we are doing will make it worse, and so forth. See for example:
How long does back pain last? And how can learning about pain increase the chance of recovery?
And of course, many things we do specifically in response to pain can indeed make our pain worse, and spread:
Dr. Wolf’s perspective says:
- Life involves pain
- Pain invariably has a cause
- What has a cause, can have an end
- We just need to go through that process
This may seem like small comfort when we are in the middle of the pain, but if we’ve broken it down into parts with Dr. Wolf’s “box method”, and dealt with the first two parts (the sensations and the emotions) as well as reasonably possible, then we can tackle the third one (the story) a little more easily than we could if we were trying to come at it with no preparation.
What used to be:
“This pain has ruined my life, is making it unbearable, will almost certainly continue, and may get worse”
…can now become:
“This pain is a big challenge, but since I’m here for it whether I want to be or not, I will suffer as I must, while calmly looking for ways to reduce that suffering as I go.”
In short: you cannot “think healing thoughts” and expect your pain to go away. But you can do a lot more than you might (if you left it unexamined) expect.
Want to know more from Dr. Wolf?
We reviewed a book of hers recently, which you might enjoy:
Outsmart Your Pain – by Dr. Christiane Wolf
Take care!
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Oranges vs Lemons – Which is Healthier?
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Our Verdict
When comparing oranges to lemons, we picked the oranges.
Why?
In the battle of these popular citrus fruits, there is a clear winner on the nutritional front.
Things were initially promising for lemons when looking at the macros—lemons have a little more fiber while oranges are slightly higher in carbs, but the differences are small and both are very healthy in this regard.
However, alas for this writer who prefers sour fruits to sweet ones (I’m sweet enough already), the micronutrient profiles tell a different story:
In terms of vitamins, oranges have more of vitamins A, B1, B2, B3, B5, B9, E, and choline. In contrast, lemons have a (very) little more vitamin B6. You might be wondering about vitamin C, since both fruits are famous for that—they’re equal on vitamin C. But, with that stack we listed above, oranges clearly win the vitamin category easily.
As for minerals, oranges boast more calcium, copper, magnesium, potassium, selenium, and zinc, while lemons have more iron, manganese, and phosphorus.
Technically lemons also have more sodium, but the numbers are truly miniscule (by coincidence, we discover upon grabbing a calculator, you’d need to eat approximately your own bodyweight in whole lemons to get to the RDA of sodium—and that’s to reach the RDA, not the upper healthy limit) so we’ll overlook the tiny sodium difference as irrelevant. Which means, while closer than the vitamins category, oranges win on minerals with a 6:3 lead over lemons.
Both fruits offer generous helpings of flavonoids and other polyphenols such as naringenin and hesperidin, which have anti-inflammatory properties and more specifically can also reduce allergy symptoms (unless, of course, you are allergic to citrus fruits, which is a relatively rare but extant allergy).
In short: as ever, enjoy both; diversity is great for the health. But if you want to maximize the nutrients you get, it’s oranges.
Want to learn more?
You might like to read:
Lemons vs Limes – Which is Healthier?
Take care!
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Tips for Avoiding PFAs
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It’s Q&A Day at 10almonds!
Have a question or a request? You can always hit “reply” to any of our emails, or use the feedback widget at the bottom!
In cases where we’ve already covered something, we might link to what we wrote before, but will always be happy to revisit any of our topics again in the future too—there’s always more to say!
As ever: if the question/request can be answered briefly, we’ll do it here in our Q&A Thursday edition. If not, we’ll make a main feature of it shortly afterwards!
So, no question/request too big or small
❝Hi, do you have anything helpful on avoiding PFAs?❞
PFAS, or perfluoroalkyl and polyfluoroalkyl substances, are “forever chemicals” made specifically to avoid degradation of industrial and chemical products. Which is great for providing stain and water resistance, but not so great for our bodies or the environment.
To go into all the harms they cause would take a main feature (maybe we will, one of these days), but suffice it to say, they’re not good, and range from cancer and insulin resistance to hypertension and reduced immune response.
To answer your question in a nutshell, avoiding them completely would be almost impossible, but we can reduce our exposure a lot by avoiding single-use food/drink products that have been waterproofed, e.g. paper/bamboo straws, utensils, cups, dishes, take-out containers, etc.
Also, anything advertised as “stain-resistant” that you suspect should be quite stainable by nature, is probably good to avoid too.
For more detailed information than we have room for here today, here’s a helpful overview:
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The Health Fix – by Dr. Ayan Panja
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The book is divided into three main sections:
- The foundations
- The aspirations
- The fixes
The foundations are an overview of the things you’re going to need to know, about biology, behaviors, and being human.
The aspirations are research-generated common hopes, desires, dreams and goals of patients who have come to Dr. Panja for help.
The fixes are exactly what you’d hope them to be. They’re strategies, tools, hacks, tips, tricks, to get you from where you are now to where you want to be, health-wise.
The book is well-structured, with deep-dives, summaries, and practical advice of how to make sure everything you’re doing works together as part of the big picture that you’re building for your health.
All in all, a fantastic catch-all book, whatever your health goals.
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Tasty Tabbouleh with Tahini
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Tabbouleh is a salad, but it’s not “just a salad”. It’s a special kind of salad that’s as exciting for the tastebuds as it is healthy for the body and brain. Its core ingredients have been traditional for about a dozen generations, and seasonings are always a personal matter (not to mention that Lebanese tabbouleh-makers centuries ago might not have used miso and nooch, as we will today), but the overall feel of the Gestalt of tabbouleh seasonings remains the same, and this recipe is true to that.
You will need
For the tabbouleh:
- 1 cup bulgur wheat
- 1 cup plum tomatoes, chopped
- 1 cucumber, peeled and chopped (add the peel to a jug of water and put it in the fridge; this will be refreshing cucumber water later!)
- 1 cup chickpeas, cooked without salt
- 1/2 cup parsley, chopped
- 1/2 cup mint, chopped
- 2 spring onions, finely chopped
- 2oz fresh lemon juice
- 1 tsp white miso paste
- 1 tsp garlic powder
- 1 tsp ground cumin
- 1 tsp ground celery seeds
- 1 tsp ground nigella seeds
- 1 tsp ground black pepper
- 1 tsp MSG, or 1/2 tsp low sodium salt (you can find it in supermarkets, the sodium chloride is cut with potassium chloride to make it have less sodium and more potassium)
- 1 tbsp nutritional yeast (nooch), ground (it comes in flakes; you will have to grind it in a spice grinder or with a pestle and mortar)
For the tahini sauce:
- 3 garlic cloves, crushed
- 3 tbsp tahini
- 1 tbsp fresh lemon juice
- 1 tbsp white miso paste
- 1 tsp ground cumin
To serve:
- A generous helping of leafy greens; we recommend collard greens, but whatever works for you is good; just remember that dark green is best. Consider cavolo nero, or even kale if that’s your thing, but to be honest this writer doesn’t love kale
- 1 tsp coarsely ground nigella seeds
- Balsamic vinegar, ideally aged balsamic vinegar (this is thicker and sweeter, but unlike most balsamic vinegar reductions, doesn’t have added sugar).
Method
(we suggest you read everything at least once before doing anything)
1) Rinse the bulgur wheat and then soak it in warm water. There is no need to boil it; the warm water is enough to soften it and you don’t need to cook it (bulgur wheat has already been parboiled before it got to you).
2) While you wait, take a small bowl and mix the rest of the ingredients from the tabbouleh section (so, the lemon juice, miso paste, and all those ground spices and MSG/salt and ground nutritional yeast); you’re making a dressing out of all the ingredients here.
3) When the bulgur wheat is soft (expect it to take under 15 minutes), drain it and put it in a big bowl. Add the tomatoes, cucumber, chickpeas, parsley, mint, and spring onions. This now technically qualifies as tabbouleh already, but we’re not done.
4) Add the dressing to the tabbouleh and mix thoroughly but gently (you don’t want to squash the tomatoes, cucumber, etc). Leave it be for at least 15 minutes while the flavors blend.
5) Take the “For the tahini sauce” ingredients (all of them) and blend them with 4 oz water, until smooth. You’re going to want to drizzle this sauce, so if the consistency is too thick for drizzling, add a little more water and/or lemon juice (per your preference), 1 tbsp at a time.
6) Roughly chop the leafy greens and put them in a bowl big enough for the tabbouleh to join them there. The greens will serve as a bed for the tabbouleh itself.
7) Drizzle the tahini over the tabbouleh, and drizzle a little of the aged balsamic vinegar too.
Enjoy!
Want to learn more?
For those interested in some of the science of what we have going on today:
Take care!
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Which Plant Milk?
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Plant-based milks—what’s best?
You asked us to look at some popular plant milks and their health properties, and we said we’d do a main feature, so here it is!
We’ll also give a quick nod to environmental considerations at the end too (they might not be quite what you expect!). That said, as a health and productivity newsletter, we’ll be focusing on the health benefits.
While we can give a broad overview, please note that individual brands may vary, especially in two important ways:
- Pro: many (most?) brands of plant milks fortify their products with extra vitamins and minerals, especially vitamin D and calcium.
- Con: some brands also add sugar.
So, by all means use this guide to learn about the different plants’ properties, and/but still do check labels later.
Alternatively, consider making your own!
- Pros: no added sugar + cheaper
- Cons: no added vitamins and minerals + some equipment required
Almond milk
Almond milk is low in carbs and thus good for a carb-controlled diet. It’s also high in vitamin E and a collection of minerals.
Oat milk
Oats are one of the healthiest “staple foods” around, and while drinking oat milk doesn’t convey all the benefits, it does a lot. It also has one of the highest soluble fiber contents of any milk, which is good for reducing LDL (bad) cholesterol levels.
See for example: Consumption of oat milk for 5 weeks lowers serum cholesterol and LDL cholesterol in free-living men with moderate hypercholesterolemia
Coconut milk
Coconut has a higher fat content than most plant milks, but also contains medium-chain triglycerides (MCTs). These raise HDL (good) cholesterol levels.
Read the study: How well do plant based alternatives fare nutritionally compared to cow’s milk?
Hemp milk
Being made from hemp seeds that contain a lot of protein and healthy fats (including omega-3 and omega-6), hemp milk packs a nutritious punch. It’s carb-free. It’s also THC-free, in case you were wondering, which means no, it does not have psychoactive effects.
Pea milk
It’s very high in protein, and contains an array of vitamins and minerals. It’s not very popular yet, so there isn’t as much research about it. This 2021 study found that it had the nutritional profile the closest to cow’s milk (beating soy by a narrow margin) and praised it as a good alternative for those with a soy allergy.
This is Research Review Monday so we try to stick to pure science, but for your interest… here’s an interesting pop-science article (ostensibly in affiliation with the pea milk brand, Ripple) about the nutritional qualities of their pea milk specifically, which uses particularly nutrient-dense yellow peas, plus some extra vitamin and mineral fortifications:
Read: Ripple Milk: 6 Reasons Why You Should Try Pea Milk
Soy milk
Perhaps the most popular plant milk, and certainly usually the cheapest in stores. It’s high in protein, similar to cow’s milk. In fact, nutritionally, it’s one of the closest to cow’s milk without involving cows as a middleman. (Did you know three quarters of all soy in the world is grown to feed to livestock, not humans? Now you do).
And no, gentlemen-readers, it won’t have any feminizing effects. The human body can’t use the plant estrogens in soy for that. It does give some isoflavone benefits though, which are broadly good for everyone’s health. See for example this research review with 439 sources of its own:
Read: Soy and Health Update: Evaluation of the Clinical and Epidemiologic Literature
Quick note on flavor: nut milks have the flavor of the nut they were made from. Coconut milk tastes of coconut. The other milks listed above don’t have much of a flavor—which in many cases may be what you want.
Note on environmental considerations:
A lot of us try to be as socially responsible as reasonably possible in our choices, so this may be an influencing factor. In a nutshell:
- Oats and Soy are generally grown as vast monocrops, and these are bad for the environment
- They are still better for the environment than cow’s milk though, as for example most soy is grown to feed to cows, not humans. So including cows in the process means four times as much monocrop farming, plus adds several other environmental issues that are beyond the scope of this newsletter.
- Almonds are particularly resource-intensive when it comes to water use.
- Still nowhere near as much as cows, though.
- Peas are grown in places that naturally have very high rainfall, so are a good option here. Same generally goes for rice, which didn’t make the cut today. (Nor did hazelnuts, sorry—we can only include so much!)
- Hemp is by far and away the most environmentally friendly, assuming it is grown in a climate naturally conducive to such.
- Making plant milk at home is usually most environmentally friendly, depending on where your ingredients came from.
- Literally any plant milk is much more environmentally friendly than cow’s milk.
See the science for yourself: Reducing food’s environmental impacts through producers and consumers
See also (if you like graphs and charts): Environmental footprints of dairy and plant-based milks
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