Is Reverse Osmosis Water Free?

RO water definition

RO water is water filtered by a reverse osmosis system. The water passes through several filters before flowing through an osmotic membrane that will let only water molecules and the smallest minerals (calcium and magnesium) pass through.

RO water and health

Water's main role is to cleanse our bodies rather than provide us with minerals. The lower its particle content (TDS), the greater its cleansing “power.” RO water is therefore the best water for your health. For more information, download our guide: How to choose your drinking water?

RO water and aquariums

A reverse osmosis system gives you pure water, free of bacteria and other pollutants, making it perfect water for your fish. You will also be able to adjust your GH and KH easily.

RO water and pH

Because RO water has a very low mineral content, it has little or no mineral buffering. Very soft water allows pH to vary widely. The pH value can therefore be high or low and vary over time.

RO water and demineralized water

Unlike demineralized water, RO water still contains small amounts of minerals (calcium and magnesium). Demineralized water is not suitable for drinking because it does not conduct electricity.

RO water or spring water?

Good-quality bottled spring water is available with a dry residue level between 10 and 100 mg/L. Examples include Mont Roucous, Montcalm, and Rosée de la Reine. The downside is that it is expensive (0.40 €/L for Mont Roucous) and is not available everywhere.

How do you make RO water?

The best way to get RO water is to buy a reverse osmosis system. If you have decided to take the plunge and buy an RO system, but feel a little lost, follow our guide : How to choose your RO system?

"A reverse osmosis system is expensive." Not anymore!

Through josmose.fr, our company has made it its mission to make home RO systems accessible so that everyone can have one. That is why, while market leaders line their pockets by offering reverse osmosis systems for between 1,000 and 2,000 euros, we offer equivalent models for between 230 and 900 euros (we refer you to the article "How to choose your home RO system?" to understand the differences). How do we do it, you may ask? There are 3 reasons for our low prices:

- Buying directly from the source

While our competitors buy their equipment from European wholesalers who buy from Taiwanese wholesalers,who in turn source it from factories in Asia, we have done extensive sourcing work to work directly with manufacturers and get the best possible value for money.

- A small company

We have no salespeople roaming the streets of France to sell RO systems. There are just 2 of us, both engineers, running our business, and we optimize all development costs to be as competitive as possible.

- Low margins

At josmose.fr, excessive margins are out of the question. Of course, we need to make a living and are gradually starting to pay ourselves, but our primary goal is to reach as many health-conscious consumers as possible, regardless of their purchasing power.

That is why our prices are 2 to 4 times lower than the market leader's, for products of equivalent or even better quality.

How much does RO water cost ?

Let's do a little math together... We said that one of our home RO systems costs between 230 and 900 euros to buy. What about consumables? Depending on the RO system model you choose, filters, filter cartridges, and membranes will cost you between 70 and 270 euros per 2-year cycle, thanks to the discounted complete kits we offer.

So, if we spread the cost of your reverse osmosis system over 10 years, assume a water cost of 3.75 euros per cubic meter and daily consumption of 10 liters of water per household, we get the following figures:

- Least expensive RO system: 230/10 + 75/2 + 10x365x3x3.75/1,000 = 101.5 euros per year, or 8.4 per month or 28 cents per day

- Most expensive RO system: 900/10 + 270/2 + 10x365x3x3.75/1,000 = 266 euros per year, or 22 per month or 72 cents per day

Now let's compare this with half as much consumption, but using bottled water:

- Least expensive water (Cristaline, with quality that varies widely depending on the source): 1.03/9x5x365 = 209 euros per year, or 35 euros per month or 1.15 euro per day

- Best water (Mont Roucous, recommended for infants and pregnant women): 2.76/9x5x365 = 560 euros per year, or 56 euros per month or 1.53 euro per day

We are not taking into account transportation costs to buy your water, or the significant environmental impact of plastic bottles!

You can therefore see that drinking RO water, beyond its health and environmental benefits, allows you to reduce your drinking water budget by a factor of 2 to 6.

To sum up...

RO water is not free, but our efforts have considerably reduced its cost to consumers. Drinking water produced by a home RO system is now 2 to 6 times less expensive, and infinitely better for the environment, than drinking bottled water.

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