Q: What is Reverse Osmosis Water, and Should I Drink It?

I read an article about pharmaceuticals in Toronto city water, and now I’m concerned about the wide range of contaminants in my tap water.

Should I let my kids drink it?

Choosing a water treatment method can be overwhelming at first, to say the least.

Filtration…or purification? What is reverse osmosis?

Fortunately, we’re here to simplify the process!

Let’s begin with the difference between filtration and purification.


Water filtration involves a barrier that prevents particles in the water from pushing through, like with a coffee filter. The coffee filter acts as a barrier to separate the coffee grounds from the drinkable coffee itself.

There are two general types of water filters – sediment filters (used to remove particles of dirt, dust, and rust) and carbon filters (used to reduce chemicals like chlorine, as well as treat taste and odour).


Water purification is a slower process than filtration. It is used to remove much smaller particles than a regular filter can. Purified water removes 98% of all particles in the water, called TDS or total dissolved solids. Purified water can either be distilled water (often used for commercial purposes), or reverse osmosis water (for drinking).

The reverse osmosis process

The reverse osmosis process begins with filtering the water, in a step called pre-filtration. This removes both sediment and chlorine from the water.

Next, the water is forced via pressure through a semi-permeable membrane, where the TDS are rejected and sent to the drain.

This part of the process is quite slow, which is why reverse osmosis system will usually also come with a holding tank. That ensures that you have your purified water ready when you need it – on tap!

After the holding tank, the water is sent through the final stage, called post-filtration. This polishes the taste of the water, removing any remnants of taste and odour.

So what should I drink? Filtered water, or reverse osmosis?

In our humble opinion, reverse osmosis is the way to go – especially for families with children.

Not only does it reduce impurities like dirt, dust, rust, and chlorine taste and odour (which filtration can also do), but it also ensures that your little ones are not ingesting harmful contaminants that are present in the city water.

These can include carcinogenic byproducts of chlorine (like THMs and VOCs), and even pharmaceutical drugs (yes – they have been found in our tap water!).

See? Simplified! Want to learn more about the EcoWater Reverse Osmosis System?

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