Replicating Toronto Tap Water

The following is an account of an experiment I did in April 2020.

The Context

I had been messing with water for two years, adding minerals to pure water and trying all sorts of different brands, with varying results. I was having fun, but I knew there was better water out there than what I was making, buying, and getting out of my tap. As I was reading Late Steeps, Marco Gualtieri’s tea notes blog, I noticed he seemed to be getting amazing sessions with aged teas like the 2004-06 Yang Qing Hao productions. I’m aware that now his opinions of those teas have changed a bit, but back then he was enjoying them, getting tons of intense flavor and engaging energy. My experiences with Yang Qing Hao were less stellar, more boring and flat. I started to wonder… what if it was the water? Marco lives in Toronto and was using tap water usually in his older reviews. I looked up the water quality report and thought,

What if I could make Marco’s tap water in my own apartment?

The Process

The first thing I had to do was figure out the mineral composition that I was going for. The water quality report has minimum, maximum and average ranges for each of the relevant mineral ions; for example, the calcium content is between 31.1 and 38 mg/L, with an average of 35.6. I decided to aim for the averages, and see if it led to any problems. I used a slightly modified version of the Khymos mineral water calculator to convert my target ion concentrations into a mineral recipe that I could use.

(Ignore the carbon dioxide and pH, they are wrong, and also it’s not grams on the right column, but milligrams)

The ion charges didn’t match up, so I let the calculator compensate by adding bicarbonate to balance it out. 118 mg/L of bicarbonate was still within the range on the water quality report. This water is very heavy, and pretty hard. However, the hardness is higher than the alkalinity, which basically means that the flavor won’t get eaten up by excess bicarbonate. In general, the hardness to alkalinity ratio should be above 1 to prevent dullness of flavor. However, Icelandic glacial is decent for tea and has a hardness to alkalinity ratio of 0.85. This toronto water replica has a ratio of 1.32.

The amount of each mineral I had to add per gallon was all the way on the right column, in milligrams. I needed seven ingredients in my water to get that Toronto profile. My plan was to add them one at a time until I was done, pretty simple. If you add them all at once, there’s a chance they might react in some negative way.

The gang’s all here

The first five minerals, NaCl, KHCO3, MgCl2-6H2O, MgSO4-7H2O, and CaSO4-2H2O, dissolve fairly easily in water. However, the last two ingredients, MgCO3 and CaCO3 (chalk), are insoluble. So what did I do? Khymos instructs to carbonate the water – put simply, this produces carbonic acid which reacts with CaCO3 and MgCO3 to form soluble/aqueous Ca(HCO3)2 and Mg(HCO3)2. This works, but you end up with bubbly water, which I didn’t want to use for tea – I wanted to simulate what someone in Toronto would get out of their tap.

Bubbling and Debubbling


Luckily, the local Publix supermarket had Syfo Seltzer, a Reverse Osmosis carbonated water with 0 mineral content. My strategy was to make two concentrated solutions: I dissolved a gram of chalk in one bottle and 500 mg of MgCO3 in the other bottle, left it in the fridge over two nights, and rotated the bottles every once in a while until they were clear. Then, when it was time to make the water, I used an aquarium air pump to bubble air through each of the concentrates until the solution reached a pH of 8 or above, meaning all the dissolved CO2 was basically gone. I tried using a vacuum chamber for this another time, but it didn’t seem to work as well.

pH 8!

Making the Water – Putting it all together

A pinch of salt

It was then an iterative process of measuring out minerals, dissolving them in 0 TDS RO water, and then pouring that into the big jar.

Et cetera

After the first five minerals were added, it was time for the CaCO3 and MgCO3 concentrates. I simply measured out the appropriate amounts of each – one ml of the CaCO3 concentrate contained one mg of CaCO3 (in a way) and one ml of the MgCO3 concentrate contained 0.5 mg MgCO3.

This is only some of the chalk concentrate – there’s a lot in this water!
Pouring it in, almost done!
There are ions in this water is what this reading means

The TDS (Total Dissolved Solids) measured 148, even though the calculated TDS was 232. Quick note about TDS meters – they measure conductivity and multiply that reading by a constant to estimate the TDS. This water is less conductive per mg of TDS than the solution that the meter’s coefficient constant is based on. Bicarbonates are much less conductive than chlorides and sulfates. My meter’s coefficient is actually smaller than the commonly accepted one, too. So, that TDS reading was nearly meaningless, and the water was likely actually the proper TDS.

Taste of Toronto

I’ve never been to Toronto, but the finished water had a nice, natural mineral taste. It really didn’t taste synthetic, and was quite full and soft. I was impressed! The whole process took about three days, with two hours of work total.

Making the Tea

Ok! Now that the water was finally done, it was time to test it out. I had some Yang Qing Hao Jinhao Chawang lying around, so I fired up the kettle and did a little session.

The result was astounding. I had never experienced such a concentrated, thick, powerful tea before, especially from Yang Qing Hao. It’s hard to describe, but it was so satisfying, and I felt the energy much more than other sessions. I could tell that the full potential of this tea was being extracted, but the bicarbonate was providing a wonderful softness and richness. I now understood where Marco was coming from with his praise, when before, with Nashville water and even bottled water, I never got close to this experience.

Many other sessions were had with this gallon of fake homemade Toronto water.

I forget what tea this was
Teaswelike 2001 Yellow Mark
Young Sheng – thick and sweet

It was all amazing. To be clear, this water is heavy. You couldn’t go much heavier than this and have a good experience. But the calcium and magnesium are in perfect balance, as well as the sulfate and chloride, hardness and alkalinity, just a bit of potassium, not too much sodium. This, as I understand it, is a great mineral profile, especially for a water as heavy as this. I also like lighter waters, but there’s something with this Toronto water, this density in the resulting tea, that is extremely addictive. It’s too bad it was so hard to make. I plan on making it again, with a slightly easier method that shuffles the minerals around so I only have to make one concentrate.

So yeah, this is one example of what I’ve been up to in regards to water and tea. If there ever was a tea secret, this is one – water mineral content has an enormous effect on tea. I’m not suggesting everyone should make this water, as it’s rather difficult and time consuming, and maybe not for everyone. I feel like most people know that water has an effect on tea, but don’t know what to do about it. There’s probably a 50-70% chance that your tap water, when filtered to remove chlorine taste, is good enough. But if it isn’t, it might be worthwhile to find a solution (haha) to that problem, to get the most out of that hard-earned tea. Also, it’s just fun to play around with water! This experiment really opened my mind to what’s possible with a little chemistry and imagination, and I’m looking forward to making water that’s even better than Toronto’s.

Thanks for reading!!

Water, a Wicked Problem

I’ve been working on making good water for tea for almost two years now. A recent article on TeaDB mentioned puer tea storage as a “wicked problem” where there’s so many variables and not very good or clear feedback. Water for tea has proven to be a similarly wicked problem.

Natural vs. Artificial

What’s the difference between natural spring water and artificial purified mineralized water? Obviously, spring water comes from nature, and purified remineralized water is man-made. But what is the actual difference between these two substances? Does spring water have some magic structure, or is it just a good mineral balance?

What is in water?

There are 11 substances besides water that are in drinking water in various forms.

  1. Calcium
  2. Magnesium
  3. Sodium
  4. Potassium
  5. Chloride
  6. Sulfate
  7. Bicarbonate
  8. Silica
  9. Oxygen
  10. Carbon Dioxide
  11. Nitrate

These are 11 of the variables we can manipulate in the study of water. Where do you even start?

The Challenge of Purity

Getting purified water in a small scale is extremely difficult. My tap water comes from a dirty river, so cleaning it up has been a struggle. Distilled water bought at the store commonly comes in bottles that reek of plastic, are expensive, and pollute the environment. My local supermarket’s Reverse Osmosis machine produces water with a chemical aftertaste, likely from the monthly bleach treatment.

Distillation at home can be done with a distiller, but these are full of metal tubing and leave the water tasting quite strange. Also, distillation doesn’t remove odors in water very well, so distillers come with charcoal packets which don’t quite remove the taste. I purchased a $300 unit and despite the positive amazon reviews, it produced drinkable, but obviously metallic water.

I’ve also distilled in a closed all-glass setup, but the VOCs (volatile organic compounds) are reabsorbed back into the water along with high concentrations of CO2, which makes the water taste not very nice. Basically, you can have water free of minerals, with 0 TDS (Total Dissolved Solids), but full of gross gases and non-conductive chemicals from your water supply. However smartwater gets their water, I would like that too, but it’s probably a piece of equipment worth a ton of money and bigger than my apartment.

I have a home RO (Reverse Osmosis) system, but the high pressure concentrates hydrogen sulfide into the end product, and I get eggy water. Also, the TDS is only divided by 10, so there’s some minerals left. It’s quick though and not metallic, so that’s what I’m working with.

If someone knows how to get pure water at home (or anywhere) without any metallic taste, plastic taste or dissolved grossness, that tastes like absolutely nothing, please comment on this post. It would help my research a lot, and I can share my findings with others.


Probably 10% of people are getting the most out of their tea leaves, water-wise. There is so much that can go wrong with just the mineral balance of water that can ruin your tea. I also believe there are new heights in water quality and mineral content that could beat any spring water. If you disagree, please tell me why this wouldn’t be the case.

P.S. I am aware that this is a problem in coffee that has been partially solved by various companies, i.e. Third Wave Water and gcwater. These could point in the right direction, but tea is not coffee, and there’s reasons these recipes might not be optimal.


Why do I keep drinking tea?

Sometimes there are tea sessions that just aren’t good. People don’t talk about them usually because they just aren’t notable or interesting – they are moments of failure. Usually, the explanation for these sessions is “I just wasn’t in the zone.”

During tonight’s ripe session, after a full day of water research (yes, I’m diving deep into water for tea), I was kind of bouncing back and forth between the computer and the tea table, sort of half focused. Suddenly, a song came on: Mind Mischief (The Field Remix) by Tame Impala. I have been listening to both Tame Impala and The Field for years, but didn’t discover this song until I heard it repeatedly on White2Tea’s Instagram and Snapchat stories. When I kept hearing it there, I started to wonder, “yeah, it’s a cool song, but what does Paul see in it that makes him listen again and again?

This is a pattern of thinking that I believe is central to modern tea culture. What do people see in Yang Qing Hao that makes them buy it by the tong? What do people see in old Yixing teapots that make them obsessed? What makes people buy those $130 samples of old Liu Bao from Essence of Tea? And on and on.

I closed my eyes as the song played and suddenly I was lulled into a sense of happy peaceful nostalgia (yes this reads like a bad college admissions essay but it’s the truth) where my old neighborhood flashed before my eyes, the cul-de-sac with its fresh mulch, the happy feelings of freedom so different from what I find most of the time in my young adult life.

When I opened my eyes, I saw everything with startling clarity – I mean to say that colors were more vivid, details were more pronounced. The texture of the modern zhuni teapot contrasted against the plate, the whiteness of the porcelain, the waste bowl, the chabu (tea mat), everything. I suddenly felt like I was capable of greater things, to transcend my everyday life.

When you invest time and or money into tea and or teaware, you are buying opportunity for moments like this. It’s not about always having the best tea session; that can be taken away, but nothing can take away the opportunity for an incredible, eye-opening experience.



Beginners and Experts

In the world of tea, what do we gain with experience?

What’s the difference between an experienced tea drinker and a relative novice? I’m not an expert, but I’m closer to being an expert than I used to be. I’ve also interacted with many people I would consider to be experts, especially in certain areas. Here are a few things people seem to collect along the way.

Tea and teaware

I’ve not met any tea enthusiast who does not have a sizable collection. From people with over 100 teapots to those with entire rooms full of tea, there exist tea-fans so obsessed that they have gone beyond practicality. The more you learn about tea, and the more tea you learn about, the more temptation there is to buy it. Marketing is getting better and better, limited releases are everywhere (white2tea,, others), and the selection of teaware is unbelievable. It is very difficult to purposefully reduce the size of your tea/teaware stash over time, and the best way is a sale or swap.

The ability to relax and enjoy

In order to fully enjoy tea, one must drop everything else (aside from possibly a good book or album). I mean to say that worry and tea don’t go well together, especially not worry about tea. I see most (not all) beginners quite concerned about if they are making the tea “right.” Eventually, an expert learns to let the tea make itself. This is done partially through development of personal style and habit, and otherwise learning how to relax and make tea at the same time.

The ability to make good tea

Of the ten thousand ways to make tea, not all are good. Making good tea is about maximizing good qualities and minimizing bad ones. It is an iterative process that comes from many attempts. The more pots one has, the longer it takes to learn their nuances, and the worse the available water is, well, you gotta figure out a solution. The better the water is, the easier it is to make good tea. The point is, people usually get better with experience, or at least develop some character and style in their resulting tea.

Positive memories

Some tea sessions stick out over others for various reasons. With experience, the list of memorable tea sessions lengthens. That time I had HK Henry after a long, stressful day. The outdoor session at the pond in the woods. That six-tea marathon session. The tea masterclass where the puers just got older and older. That time the tea made me tear up (it happens to more people than you think!) That first bitter-turning-to sweet taste of raw puer. And the list goes on.


I’ve met some people online and offline in the tea community. Some of these friendships go beyond tea, but it’s perfectly possible and okay to have deep friendships entirely about tea. There are one-sided relationships too – some people serve as the experts and others as the novices. The best way to put your own tea journey in context is to show others what you are doing and compare with what they do. This is not to say that people with more experience are necessarily correct, but that they may have reasons for what they do that you can think about as you decide what to incorporate in different ways.

Personal opinions / the (dis)respect of others

The tea culture is a generally polite place full of different opinions. Most tea-learning is confirmed by experience, and people don’t easily let go of that which they’ve learned from experience. There are usually reasons for differing opinions but they are not easy to figure out. So, there are commonly long arguments about, for example, tea storage, unglazed vs. glazed clay, vendor choices, whether a tea is good or bad, and water (this one seems especially contentious). This is what makes tea so exciting to an expert, especially one who is willing to change their mind.

Appreciation of non-tea

The more one learns to enjoy tea, the more that enjoyment spills over into non-tea elements. Whether it’s the world of alcoholic beverages, from single malts to wine to beer to eaux-de-vie, or just appreciation of nature, tea is about exploring the richness of the world to the fullest extent. Eventually, one learns to enjoy simply living and breathing.

Patience and its rewards

Patience is a virtue, and tea requires patience. Waiting for the water to boil takes patience. Waiting for the hot tea to cool a bit takes patience. Waiting for those loooong steeps at the end of a session takes patience. And all that patience is rewarded with a slow, steady adventure. It’s quite uncomfortable to wait so long doing nothing when you are a tea novice, but eventually it becomes clear that doing nothing is the gateway to a clear experience of reality, or something like that.

Learning from mistakes / Beginner’s mind

It’s easy to mess up a session, or brew a tea for a significant other that evokes the reaction of disgust, or spill tea all over your pants. It’s also incredibly common to have your most expensive tea with your favorite teaware and be completely let down by the result. This is learning, and why the best approach to tea is not as an expert, but as a beginner, open to whatever may happen in the current circumstance. The tea experts I respect the most don’t have any pretentious attitude, but simply know how to enjoy and share tea in their own way, and especially are good at listening to experts and beginners alike.

at puerh brooklyn

P.S. I’m doing a lot of hard, time-consuming, mildly expensive work with water, and plan to share it with the world around March 2020. Sorry for the wait, but distilling water takes many hours, and my glass lab equipment is in customs. Thanks for reading!

Taste as Meditation

A lot of people make a separation between those who “nerd out” about tea and those who are spiritually connected to the tea. The zen people say “don’t think about the taste of the tea just make it and drink it” and the tea nerds say “don’t worry about stories about zen monks and health benefits just make it and drink it.” The “just make it and drink it” is common to both approaches, of course.

For a very long time, I have been just making and drinking my tea, with a sort of soft focus and presence: I pay attention and relax. But recently, I have been consciously analyzing my tea as I drink it, like some kind of sommelier searching for flavor notes. Now why would I do such a thing?

The level of focus required in order to determine what kinds of flavors are present in the tea is surprisingly deep. The fact that taste is subjective doesn’t change the fact that the tastes are there waiting to be uncovered. Perhaps they don’t need to be labeled, especially because I can’t tell my longans from my gardenias, but at least you can group your raw tea-drinking sensation into different dimensions of flavor. For example, low notes vs high notes: you can think “this taste, although I haven’t a clue what it resembles, is low.” Also, does it last a long time? When does it arrive, and when does it leave? Do the successions of notes have a rhythm?


Yun is a term that, according to chinese tea lexicon Babelcarp, means “literally Rhyme, but in a tea context, Aftertaste, or more generally, the elusive essence of experiencing a given tea.” It’s used as Yan Yun when it refers to a Wuyi rock oolong’s “rocky” taste/aftertaste. Now why would it be called rhyme?

My personal view on Yun is that it occurs when the succession of flavors has a rhythm. In poetry, a rhyme only happens with a rhyme scheme, which is essentially rhythmic:

I drank my tea alone today

It seemed to me sublime

For when I focused deep within,

I found a splendid rhyme.

The rhyming words go in a specific place rhythmically: if they were anywhere else in the poem, it would feel different, and probably not rhyme at all.

I sipped a tea with a friend

She hated it because

It didn’t have a rhyme at all,

It wasn’t a very good time.

See, that’s awkward and bad. So, when a tea has Yun, or rhyme, it is because the interplay of flavors over time is rhythmically structured. By focusing and bringing these flavors to consciousness in real time, you can experience the essence of the tea as if it were a poem and a song. This strikes a perfect balance between the meditative and the enthusiast approaches to tea, which usually oppose each other. I used to look for qi more than yun, but perhaps they are two sides of the same thing!