The Water Classroom

Learn the basics of water chemistry and water treatment.

Pool Chemistry: The Secret to Swimming Pool Science

by Abbey R Published 5.19.2016

I can't believe that it has taken me this long to write a blog about one of the biggest roles that water has played in my life: the water in swimming pools.  I was a competitive swimmer for 15 years, a lifeguard for 6 years and a swim coach for 4 years.  I've seen and smelled my fair share of swimming pools.  Just like your drinking water there are rules and regulations about swimming pools that are designed to keep you healthy.  The CDC (Centers for Disease control) recommends that free chlorine should be 1-3 ppm (parts per million) and the pH should be 7.2-7.8.  Other sources further recommend that the total alkalinity should be 80-120 ppm and the calcium hardness between 200-400 ppm.  Why are there such specifics about pool water?

One of the first things you notice when you visit a pool is how it looks.  A well maintained pool will have transparent water that allows you to see clearly to the bottom.  I've swam in some pools where you have to feel your way to the wall or lift your head out of the water to figure out where you are. 

Cloudy water can be caused from an improper balance of chemicals or filtration problems.  For an outdoor pool, the sun or too much rain can quickly cause an imbalance in chemicals.  In addition, outdoor pools face all sorts of other obstacles like birds, pollen and sunscreen.  Cloudy water is also caused by poor filtration.  The water should be going through a filtration system.  Some pools use a reverse osmosis system to reduce the amount of calcium in the water that tends to accumulate over time.  Using a reverse osmosis system allows the vast majority of water to be reutilized.  Score!

Another sense that you notice before ever going in the water is the smell of a pool.  A well-maintained pool shouldn't have any smell.  The pool smell comes from chloramines.  Chloramines are formed because of an interaction with compounds like sweat and urine.  Most pools that I have been to have a pool rule of showering before entering.  The shower cuts down on the compounds that can cause chloramine formation.  Adding more chlorine reduces the chloramines and thus the pool smell.  Similarly, when there isn't enough chlorine in the pool, our eyes and skin get irritated.  The pH is too low and chlorine needs added to raise it closer to the pH of human tears, 7.4.  Both of those things that we've been taught to mean that there is too much chlorine in the pool actually means there is too little chlorine in the water. 

Swimming pool water requires careful monitoring and adjusting of chemicals to ensure your health and safety.  This is very similar to a municipal water system although the complexity and end water chemistry is a little different.  So, before you dive into that refreshing pool, take a moment to appreciate the clean and odorless water and the chemistry that is making the water look so inviting.  


Water Contaminant: Lead

by Mark B Published 11.4.2015

You’ve probably already heard that Lead is a toxic metal that you don’t want in your drinking water.  Interestingly, the connection between Lead and water delivery goes back to at least Roman times.   In fact, the Latin word for Lead is plumbum, which gives us the chemical symbol Pb, as well as the words “plumbing,” “plumber,” etc.  In spite of how useful it has always been, Lead also causes significant health issues.  Consuming Lead has been shown to reduce intelligence, increase aggression, cause deafness, stunt growth, and damage organs including the brain and kidneys.  Children are at greatest risk because they are growing and because of their smaller bodies (they would consume more relative to their body weight).  The USEPA regulates Lead in public water supplies to a maximum of 0.015 parts per million, but the public health goal is to have zero in drinking water.   


Typically Lead would be present because it leached from Lead pipes or joints that bring water into the house, leached from Lead solder used to join pipes together, or from erosion of natural ores in the ground.  Another source could be older brass faucets or other fittings which come in contact with the water.  While Lead has been banned from plumbing solder and distribution system piping for many years, just recently the US EPA determined that only brass with less than 0.25% Lead content is allowed to be in contact with drinking water.

This metal can be either dissolved in the water or it may be present as very small particles, or it  can be in both forms at the same time.  When treating your water in the home it is important to  be aware of this.  A filter that reduces one form may not do a good job with the other.  For example,  a pitcher might do well against dissolved Lead but not particulate, while a micron cartridge might filter some particles but not the dissolved form.  To protect yourself and your family, choose a treatment that has been certified to the relevant standard.  Because of normal shifts in water chemistry or physical disturbances to pipes, it may be best to select a device that reduces both forms of Lead.  Point-of-use choices include reverse osmosis, distillation, as well as carbon blocks that have been specially designed to treat both the particulate and dissolved forms of Lead.  The web sites of the Water Quality Association and National Sanitation Foundation provide listings of devices certified to Standards WQAS-200, ANSI/NSF 53, 58, 62, and 372.   

It’s probably worth having your water tested, especially if you have children and / or live in an older home.  Lead in drinking water can be a serious health hazard.  Fortunately there are many options to limit exposure for you and your family.

Contact Mark B.

What's in Your City Water Supply? Part 2

by Dan M Published 10.21.2015

In my previous blog, I explained how city water is typically treated and posed the question, what is still left in the water after it has gone through the city’s water treatment process?

Let’s start with a big concern for some people, bacteria. For the most part, all cities add chlorine to disinfect the water, however; they do not remove bacteria from the water supply. Although chlorine does not remove bacteria, it will render it harmless.  But, how does disinfection differ from removal?

Removal is exactly as it sounds: It is the absence of the contaminant in question.  In this case, the absence of bacteria.  It is not necessary to remove bacteria from the water source if all of the bacteria is disinfected properly (rendered harmless) and the water transportation system is in good working order - free of leaks with consistent pressure.  A leak could reintroduce organic matter into the water supply and the disinfected bacteria will become a food source to live organic matter.  The protocol for such a problem is for the end user to boil their water before consumption.  The act of removing the bacteria from the water at the treatment facility is extremely costly and is a much slower process, thus, disinfection is the widely chosen process.

So what about other contaminants in the water such as lead, iron and hardness?  City water treatment plants test for lead before sending the water to homes and businesses and if the protocols are followed the levels of lead delivered to your home are safe.  However, most old plumbing systems have lead in the pipes.  This allows lead to be reintroduced into the water supply depending on many different scenarios such as velocity of water, aggressiveness of water and contact time.  Cleveland water supplies add orthophosphate to help reduce the leaching effect of those lead pipes. But how do you know that after traveling along miles and miles of plumbing that your water supply hasn’t picked up enough lead to do damage?  That one is on you!!  What goes through your pipes and plumbing fixtures is your responsibility. 

Similar to the lead issue, most old city pipes are made of cast iron and depending on velocity and pressure changes, your city water will pick up iron sediment from the plumbing and bring it straight to your clothes, hot water tank, dishes, lawn and anywhere else that will be a nuisance.  Who is responsible for the orange staining and inefficient life span of appliances caused by iron in the water?  That again is on you! 

And, how about hardness scaling?  If you noticed from the Cleveland water example there wasn’t any hardness removal mentioned in the process.  Surface water is relatively low in hardness because it hasn’t made its way through calcium enriched stone and materials such as limestone.  In Cleveland, the hardness can generally range anywhere from 7-18 gpg.  This is enough hardness to cause problems with hot water tanks, spotting of dishes, etched shower doors, dishwashers, washing machines, ice machines, refrigerator dispensers, hair and skin irritations and the effectiveness of soaps used in your home. Although hardness is not directly harmful in small doses its effects are costly. The treatment of hardness in city water is also your responsibility as the homeowner.

So, what can a city resident do to ensure that their home is free from the effects of lead, iron and hardness in city water?  There are thousands of in-home, residential water treatment options available at water treatment companies, DIY stores and local plumbing supply houses. Do yourself a favor and research your water treatment options before making a purchase. Also, have your water tested by a local water treatment professional to verify what is actually in your water that needs to me removed.  Make sure that what you buy will treat your specific concerns and that the water treatment equipment you choose can be maintained easily by yourself and/or a quality professional.  Not all water treatment equipment is equal and most long lasting, efficient systems are not cheap.

Now I am not advocating protesting against water companies and questioning any regulation that governs your daily life however, it is good to know what the regulation protects you against.  It is good to know why a regulation is in place and who it protects.  It is good to know that when chlorine is added to your water it is better than not having it added to the water.  I would rather know where I stack up against the regulations and be proactive in making healthier choices when and where I can to protect myself.  The research is out there we just need to ask the right questions.  So I ask you…what is in your city water?


Lead Pipe with Iron Deposits



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Maple Syrup Meets Technology

by Abbey R Published 8.26.2015

My daughter loves watching Curious George. I'm not sure why, unless it is that she gets to see one of her stuffed animals come to life on the screen. In one of the recent episodes, George learned how to make maple syrup. He tapped a tree, gathered sap and then watched it boil down into syrup. George, of course, managed to do all of this in a 12 minute episode, but even the episode depicted it all being done in 8-10 hours. I found that a little far-fetched, but all in all it was pretty informative considering it was a cartoon.

Living in Northeast Ohio, the maple syrup process wasn't completely unfamiliar to me. The basics were all covered in the Curious George episode. You need to tap the tree with some kind of spigot. Once it is tapped, you need to hang something that will collect the sap. Around here, blue bags are pretty popular. As George learned, sap from the tree doesn't taste like maple syrup mainly because there is so much water in the sap. To transform it into syrup, you typically boil sap until most of the water is removed. One website I saw said that it took 43 gallons of sap to make 1 gallon of syrup!!

So, by this point, I am sure you are wondering how this has any relevance to a water blog. Well many of the people that are in the industry actually use a reverse osmosis system to speed up the process of making syrup. They just use the system opposite of how I would typically think a system works. Typically, your well or municipal water goes through a prefilter and then into a reverse osmosis semi permeable membrane.  The membrane separates the water into two streams: a permeate stream (the water you drink) and a drain stream (filled with undesirable contaminants). The permeate stream goes through a postfilter and then to your faucet. If you want a more in depth explanation of reverse osmosis drinking water systems, you can read more about it here. To maple syrup makers, the purified water is actually the waste product! They want what I would typically consider the waste stream. In the "waste" stream, the product is already concentrated so it takes less work (boiling) to make it into maple syrup.

I love seeing people think of creative ways to adapt existing technology to meet their needs.

Contact Abbey R.

What's in Your City Water Supply? Part One

by Dan M Published 7.30.2015

City water supplies generally come from surface water sources.  Surface water sources can be lakes, rivers, ponds, reservoirs and virtually any large collection of water.  Now, think about your local lake for a minute. Is the water clear; can you see the bottom of the lake on a sunny day? If the lake is clear does that mean the water is free of contaminants and safe to drink?  What if the water is cloudy and dirty?  What is the cause of cloudiness and could it be harmful to me?  I bet you have not really thought about how your city deals with removing contaminants from the water supply.  So, let’s take a look at how cities treat water.

Most water treatment facilities utilize the same basic treatment operations, so I am going to focus on one city in particular, Cleveland, Ohio. Cleveland gets its water from Lake Erie, one of the best fishing lakes of the great lakes. Water is drawn in through large screens miles off shore to ensure that it starts out as clean as possible.  (Water drawn near the shore has a high potential to be more concentrated with surface run-off and pollution.) The screens help remove large organic matter such as fish, plants and garbage, to name a few.  The water is then drawn to a rapid mix where chemicals are added for the first phase of treatment.  These chemicals are comprised of a disinfectant, a chemical for taste and odor and a coagulant.  For Cleveland city water these three chemicals are chlorine, activated carbon and alum.  Alum is a coagulant used to bind small particles into large clumps that can be filtered out or that will settle out of the water.  The settling out process is called sedimentation. The water continues to be filtered through large-scale sand and coal filters which will remove smaller organic particles that did not settle to the bottom of the tank during the sedimentation process.  Finally, after the water travels through sand and coal filters, it is again treated with more chemicals.  Cleveland water has chlorine added for disinfection, fluoride for dental hygiene (It is a law in the state of Ohio that fluoride be added to all city water supplies.) and orthophosphate to help reduce the leaching of lead from household pipes.  The water is then deemed good for distribution. 

That is a very simple explanation of how a city water treatment plant treats water.  But even though the water has been disinfected and filtered, I go back to my original questions. Is the water free of contaminants or could it still be harmful to me? It is important to note that city water treatment facilities are closely regulated and undergo strict inspections.  Water that is distributed from the facility is within a healthy range for consumption for the majority of the population that utilizes the water and the general public is notified about any possible contamination from a regulated substance.  However, it is not regulated to protect your home.  Additionally, most city water is not treated to remove taste and odor, hardness, iron, lead, pharmaceuticals and many other natural and man-made substances. 

In my next blog, we’ll take a look at what could be left in the water (bacteria, lead, iron, hardness minerals?) after it has gone through the city’s water treatment process and what you can do about it.


Garret A. Morgan Water Treatment Plant in Cleveland, Ohio.

Contact Dan M.

Disinfecting Your Water

by Mark B Published 5.13.2015

In 1854 there was an outbreak of cholera in London. A doctor named John Snow was very intent on finding out the source of what was killing people. He went door to door to map out household deaths, and determined that what everyone had in common was they had all drawn water from the same community pump on Broad Street. Legend has it that he took the handle off the pump to stop its use. It was then found that this particular pump was drawing water contaminated with the city's waste. It can be argued that John Snow was the father of what we now know as modern Public Health.

Woman Filling a Glass

A major triumph of civilization is our ability to treat drinking water to prevent water borne diseases. This is the single most important factor in lengthening human life expectancy. Take a look at some waterworks built starting in the late 1800's. Many were built from stone, contain polished brass and bronze fixtures, and were meant to serve as lasting monuments to a community's commitment to the health of its citizens. Sand filtration and the addition of chlorine are common methods used to remove or kill microbes in the water supply. Sadly, cholera still causes illness and death in the world today because so many people still don't have access to even these basic tools.

Clean drinking water is easy to take for granted when you, your parents and grandparents have all lived with it. Without chlorine or chloramine added to our water supply, our world would be a very different place indeed. A friend of mine says he likes the smell of chlorine in his drinking water because then he "knows it's working." But for many of us the taste and odor of disinfectants can be disagreeable. We like being protected, but prefer not to drink it. Fortunately, this is one of the easiest things to treat. Activated carbon is most commonly used in a tank for the whole house or a cartridge at the point of use. Carbon removes chlorine, chloramine and a number of contaminants by a process called adsorption, which is kind of like how dirt is held onto sticky tape. Standard activated carbon works great for chlorine reduction, but catalytic activated carbon is better for chloramine. Carbon has a finite life span and needs to be replaced periodically. How often it is replaced mostly depends on how much water has been used and how much chlorine or chloramine needed to be removed.

So eat, drink, and be merry, for you have safe water today and tomorrow, and it can taste good too.

Contact Mark B.

Tiny Bubbles—The Chemistry of Carbonation

by Ed R Published 10.20.2014

If you read the title and started humming the song, then you are probably at least as old as I am. If you don’t know what I am talking about, then you will have to wait till the end of this blog post to find out. Chemically speaking, the term “carbonation” is somewhat misleading in that it implies conversion to carbonate or the addition of carbonate to a solution. Most carbonate compounds are not very soluble. That is to say that they don’t go into solution very well. But we won’t get hung up on that because when most of us hear the term we think “fizzy.” The generally accepted definition of carbonation is the process of dissolving carbon dioxide (CO2) into a solution.

Carbon dioxide is a gas. It can be generated through a chemical reaction such as acidifying a carbonate compound (the volcano experiment with baking soda and vinegar). It can be the result of microbial action (fermentation), or it can be directly injected into a solution. So just what happens when we carbonate something? Well, a lot of things actually. But before we talk about what is going on, we have to ask the question, why do we carbonate beverages? Without getting too biological, it basically tickles our taste buds. The bubbles themselves and some of the compounds generated in the process stimulate our taste receptors. Dissolved gases are also an effective way of transferring certain flavor compounds in beverages.

When CO2 is dissolved in water a series of chemical reactions can take place. Initially CO2 forms carbonic acid (which can stimulate the sour taste receptors).

H2O + CO2 ↔ H2CO3 (carbonic acid)

The carbonic acid can then disassociate into a hydrogen ion and bicarbonate (often referred to as alkalinity).

H2CO3 ↔ H+ + HCO3- (bicarbonate)

This whole series of reactions is often referred to as the bicarbonate buffering system, and it is an important system for all living things (but that is another lesson).

By now you are probably wondering what that double arrow (↔) means. It is a chemist’s way of depicting an equilibrium reaction. Basically this is showing that the reaction can go in either direction depending on which compounds are there in the highest concentration. Which one will predominate is dependent entirely upon pH (see my “What is pH” blog post). At low pH there will be more carbonic acid present, at higher pH the bicarbonate concentration will be the greatest. The more CO2 we pump into a solution, the more carbonic acid we form which subsequently reduces the amount of alkalinity. This is why most carbonated beverages are slightly acidic. So that’s the chemistry of it, but what most people want to know is what makes the solution “fizz” when I open the bottle?

The answer to this lies in one of the Ideal Gas Laws, specifically “Henry’s Law.” Henry’s Law basically concerns the effect of pressure on the solubility of a gas in a solution. You can find a lot of information on this elsewhere. When beverages are carbonated, they are subjected to infusion with a high pressure stream of CO2 gas. This has the effect of forcing the CO2 into solution (gasses don’t like to stay in solution). As long as the pressure is maintained, the CO2 will stay in solution. When we open the bottle, we relieve the pressure and the CO2 will come out of solution in the form of tiny bubbles.

“Tiny Bubbles” is the signature song of Don Ho, a Hawaiian born singer and former USAF pilot. It was released in 1966 and it is one of those songs that after you heard it, you just can’t get it out of your head.

Contact Ed R.

Understanding the In-Home Water Test

by Diana M Published 10.2.2014

Kinetico Dealers offer free in-home water tests. Many people call Kinetico Consumer Relations to ask why we require a representative in their home to test the water. Some are concerned that they will be subjected to a hard-sell salesman who won't leave until the homeowner makes a purchase. Some view the water test as hocus-pocus water changing colors just for effect, with no real value.

The in-home appointment serves multiple purposes and is designed to establish a relationship between the homeowner and the water treatment provider. The water treatment expert tests the water for a variety of problem-causing materials, and discusses the homeowners' water concerns and expectations. The benefits of treated water are reviewed using a variety of hands-on visuals. A plumbing and installation site analysis helps pull all the other information together to ensure the proper equipment is installed.

hands holding test tube

Our standard in-home water test includes testing for hardness, iron, pH and TDS (total dissolved solids). Depending on the area of the country, it may also include checking whether the iron is ferrous or ferric (dissolved or particulate), and testing for manganese, hydrogen sulfide (often called "sulfur"), tannins and chlorine. The best test results are achieved on site and in real time. In a drawn sample, the characteristics of iron, hydrogen sulfide, manganese and chlorine can change quickly. The in-home analysis provides immediate results, is free and might be more accurate for some things such as hydrogen sulfide and iron.

Ferrous iron (dissolved iron), also known as clear water iron, is invisible in the water but leaves stains on clothing, fixtures, toilets and bathtubs. A drawn glass of water with ferrous iron left sitting may develop reddish-brown sediment at the bottom of the glass. That sediment is ferric (particulate) iron. Ferrous iron becomes ferric or particulate iron once it's been exposed to oxygen.

Ferrous iron and ferric iron require different methods of treatment. Ferrous iron can be removed from the water using a water softener. The level of ferrous iron and the amount of hardness (along with the plumbing audit) determines the size softener required for the home. Ferric iron requires filtration. This filtration might be a simple in-line sediment filter, but higher levels of ferric iron require a more aggressive type of treatment, such as a mechanical backwashing filter.

Manganese testing and treatment are similar to that of iron. Manganese in the water can result in gray or black stains. Again, this can be treated either with a softener or filtration system depending on whether the manganese is dissolved or particulate.

Hydrogen sulfide is usually present as a rotten-egg-smelling gas. The method used to treat hydrogen sulfide is dependent upon the rest of the water quality. For instance, if the hydrogen sulfide is a low-level gas, the Dealer might install an aeration tank that vents the gas. Or, if the hydrogen sulfide level is high with a lot of iron, an oxidizing agent might be introduced—usually chlorine which eliminates the hydrogen sulfide and oxidizes the iron to ferric iron, which is then filtered. Accurate tests are crucial to make certain your treated water is odor-free.

Chlorine is tested on-site for a couple of reasons. The pre-filter in the reverse osmosis drinking water system is selected based on the absence or presence of chlorine. The pre-filter assists performance and provides longevity to the workhorse of the RO—the membrane—by protecting the system from chlorine or sediment that is present in the incoming water.

Knowing the chlorine level also ensures the proper water softener or dechlorination system is installed. Chlorine can shorten the life of your softener if it is not dealt with properly.

Treating the water is truly a scientific process—no hocus-pocus. There is a proper detailed method of diagnosis and many proven methods of treatment. Third-party, unbiased organizations such as the Water Quality Association and the American Water Works Association are great sources of information about water testing and treatment. You can read more at or Or of course, you can always call your local water treatment expert and let them guide you through the processes.

Contact Diana M.

Helping Kids Explore Water Treatment with Fab Lab

by Ed R Published 6.6.2014
Fab Lab truck

Recently I had the opportunity to participate in a rather unique project called the “Fab Lab”. The Fab Lab, short for Fabrication Laboratory, was developed by MIT’s Center for Bits & Atoms. It is basically a large van which contains high-tech production equipment to assist students with their STEM (Science, Technology, Engineering and Math) projects. There are only two mobile units like it in the country.

Items inside the Fab Lab include a laser cutter, CNC Mill, vinyl cutter, 3-D printer and numerous other tools. It also comes fully staffed. The whole idea behind this is the “if you dream it, you can design and build it” concept. It is designed to stretch a student’s imagination and give them the means to make them come true. Besides all of the equipment the lab also serves as a classroom, complete with white board walls so students can sketch out their ideas and work out their measurements which are then translated into software programs which interface with the various pieces of machinery. All in all, pretty neat stuff!

Interior of the Fab Lab truck

The reason I got involved with this project was one of our local schools was able to secure a comprehensive continuous improvement grant which covered the cost of the Fab Lab visit and was also used to fund the materials needed for the project. What was the project you ask? Why to build a greenhouse of course!

You see, we are located in a somewhat rural area of the county. Agriculture plays an important role here. Yes, we have real working farms. When the Fab Lab idea was first proposed the school administrators thought long and hard as to how to incorporate the area’s culture and science curriculum into this project, and building a greenhouse seemed like a perfect fit. The students were overwhelming in support of the idea as well.Fab Lab fabrication equipment The greenhouse was to be composed of two elements: a regular soil based approach and a hydroponic element.

The students were tasked with coming up with items which would be needed to set up a greenhouse. They came up with all sorts of items, like pots, hooks to hang the pots, small marker stakes, shelves and small tools. These they constructed with the Fab Lab machinery.

They also recognized that the greenhouse would need water. Since two types of water were going to be used, rainwater and village water, I was asked to come up with a water element to incorporate. I came up with a “water station.” This part of the project had three parts to it as follow.

Students' water filtration solution

The Problem:

Depending on how they plan on collecting the rainwater it may contain suspended solids which need to be removed for the hydroponic element at the greenhouse. Leaves, twigs, dirt, (frogs?) may be present. The village water contains chlorine for public health purposes. Should it or should it not be removed or does it even make a difference?

The Solution:

Students needed to design an effective filter using a multi-media approach. They decided how much, what types of media and how to layer them. They needed to wash the media prior to placing it in the filter. Materials provided – scoops, screens, media, etc. Imagination – not provided!


Students were provided with testing equipment to monitor pH, EC (Electrical Conductance, an indirect measurement of TDS, Total Dissolved Solids which is important in the hydroponic element) and free chlorine levels for the village water. The purpose of this is to determine the optimal water conditions to promote plant growth.

This is what they came up with.

All of the students got to participate in the various phases of this project. I was told the K-2nd grade children had a ball washing the media. This is still a work in progress, but it’s off to a great start, and will serve as a valuable resource in the years to come. It was also a rewarding experience for me personally.

The finished greenhouse built by students

Contact Ed R.

How does hard water affect my coffee and tea?

by Mark B Published 12.11.2013

A cup of tea or coffee is 99% water, so the water used for brewing makes a big difference in the quality of what you drink. There are hundreds of compounds that are released when hot water hits the beans and leaves. When we taste, we actually use both the tongue and the nose to create a complete picture. (Just try eating soup with one hand pinching your nose…it won’t taste the same.) So if the water isn’t especially good, it can rob you of what should be a pleasurable break—chlorine and hardness are major culprits.

Chlorine will attack the flavor compounds and may be strong enough to compete with the aroma from the cup. A good carbon filter is all that’s needed to eliminate this bad actor from your diet, and the rest of your drinking water will taste better too.

Hardness is typically Calcium and Magnesium and maybe a little Iron that’s dissolved in your water. (Learn more about hardness or iron). When these minerals combine with compounds in tea and coffee, they bind together to form solids. Flavors and aroma are tied up and taken away from your mouth and nose. A water softener and/or reverse osmosis system are effective ways to fix this problem. My personal preference is an RO system, because it has a carbon filter for the chlorine, a membrane to purify, and a mineral cartridge polisher to ensure a complementary balance of ions for the tea and coffee to steep in.

Here’s something you can try just for fun if you have hard water at home or work. It also makes a simple, but safe and effective science fair project. Buy a bottle of water at the supermarket, making sure to pick one that’s been treated by reverse osmosis. Brew two cups of tea at the same time in the microwave: one with hard water, and the other with RO water. About 90 seconds should do it. Take the cups out of the microwave and remove the teabags. Now compare color; is one muddier than the other? Smell and taste; the cup made with RO water will be brighter and livelier on the palate, and you may also detect a cleaner flavor. It’s easy to observe that just because a cup of tea is darker does not mean it is stronger or richer, or that is has a full range of flavors for you to enjoy.

I did this “tea test” with a standard bag of Lipton black tea and then took these photos.

Top view of the tea test results Side view of tea test results: RO waterSide view of tea test results: hard water

Can you guess which is which?

The tea made with RO water was, you guessed it, the one on the left. I chose a black tea (instead of a green or white) because I thought the result to be visually more striking. Doing this with a highly aromatic tea such as orange pekoe, or a more subtle green tea also demonstrates what a profound difference the right water makes.

Life is just too short for a bad cup.

Contact Mark B.

Water: Understand it, Value it, Respect it. Learn more about life’s most vital resource.

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