9 Best Alternatives To Reverse Osmosis Systems (2024)

Despite being one of the best filtration techniques, reverse osmosis has downsides. Some of them include the lack of concentration of minerals in reverse osmosis water and high amounts of wastewater produced. 

You can use several alternatives present in the market to resolve your water issues, like distillers, basic sediment filters, carbon filters, etc. 

Here is a detailed guide on the 9 best alternatives to reverse osmosis systems. Follow this article to know which suits you the best!

9 Reliable Reverse Osmosis Alternative: Quick Sheet

Alternatives	Water Purity	Water Wastage & Environmental damage	Maintainance & Installation	Overall Cost
Distillers	Remove almost all the impurities, just like RO	Requires use of electricity but least environmental impact overall.	Distillers are less expensive and low effort when it comes to maintenance as compared to RO Filters	$150
Alkaline filter	Adds minerals to water	Lesser environmental damage	Easier to install and low maintenance	$30
Carbon Filters	Lesser pure water than RO	Negligible environmental damage	Easier to install, and requires frequent cartridge replacements	$15
Sediment filters	Only works for sediments, and does not remove organic chemical contaminants	Not much environmental damage	Easy installation and maintenance	$45
Water Pitchers	Much lower efficiency as compared to RO	You will have more water waste with the RO, but that water is ultimately recycled.	Easy installation, zero maintenance	$12
Ion Exchange	Works well for inorganic mineral ion impurities	Can cause water wastage	Easy installation and maintenance can be tiresome as the resin bed needs frequent cleaning and replacement	$11
UV + UF	Good for the elimination of bacterial contamination	Negligible environmental damage	Easy to install and maintain	$7
Gravity Filters	Less efficient than RO Filters	Negligible environmental damage	Easy to install and maintain	$35
Countertop Filters	Work well, but they have a low filtration capacity	Negligible environmental damage	Easy to install and maintain	$42

Also Read: Top 5 Tankless RO Choices

1️⃣ Distillers

2️⃣ Alkaline Filters

3️⃣ Carbon Filters

4️⃣ Sediment filters

Reverse osmosis filters do not remove the sediments themselves. Even they use a sediment prefilter to remove sediment impurities from water. Sediment filters help remove contaminants with a size of 5 microns or larger.

5️⃣ Water pitchers

Also Read: How To Take Apart Brita Pitcher

6️⃣ Ion Exchange

7️⃣ UV + UF

8️⃣ Gravity Filters

9️⃣ Countertop Filters

These small, easy-to-install filters are a good option for smaller homes and people on a budget. Although, you must note that countertop filters, being smaller in size, have a lesser output volume and may not be able to keep up with your household needs. 

As a final note, know this:

"When filtering water you have to start with your reason for filtration before you determine the environmental impact. For example if someone says, "I have lead in my drinking water", then Alkaline, Carbon, and Sediment filtration won't do any good. *you can get Carbon filters with lead reduction*, but again, you have to determine need before environmental.

This is also true if you live in an area with almost perfect water. (I used to live where the water from the aquifer was almost perfectly clean and soft with no treatment). In this case we used sediment only because everything else was good."



                                                                                      -u/PercMaint in r/WaterTreatment

Why Shouldn’t You Use Reverse Osmosis? (Medical Science)

When it comes to the use of reverse osmosis as a filtration technique for water, there are many myths surrounding the topic. With the growth of the internet and social media, it has become easy to get anything and everything up on the web. It becomes difficult in such scenarios to tell myth from fact. 

But don’t you worry, I’ve got you covered. Yes, reverse osmosis has some disadvantages, but not everything negative that you find online about RO systems is true. 

Let’s discuss some common myths about reverse osmosis:

#1 Myth: Minerals in Drinking Water Are Necessary

Fact: While minerals (up to a certain amount) are necessary for the body, the source of the minerals is hardly ever an issue. Also, most of the body’s mineral requirements are taken care of by the food intake one gets.

So, even though reverse osmosis water may lack certain minerals, it is not necessarily a major downside for the treatment method. Also, there are several ways in which one can have their reverse osmosis water remineralized.

#2 Myth: Reverse Osmosis Water Attacks the Body

Fact: Even though reverse osmosis water may have low TDS levels, the notion that it may cause the degeneration of mucous membranes of the body or cause deficiency of minerals in the bloodstream is wrong.

No proven studies can say that the consumption of water with low levels of total dissolved solids causes any major health problems.

#3 Myth: Alternative Technologies Are Just as Effective

Fact: Yes, there are quite a few alternative options available for reverse osmosis, but you have to keep in mind that they may not be as effective as reverse osmosis technology. The others might eliminate impurities up to a certain level.

Now that we have addressed some myths about reverse osmosis water, it’s time to flip over to the other side of the coin, i.e. the disadvantages.

There are a few disadvantages of reverse osmosis water as well, which are discussed in detail below: 

Due to such limitations of the reverse osmosis filter, there are a few alternatives to this treatment method which we have already discussed earlier. 

When Should You Not Consider RO Alternatives? (Don’t Ignore This)

We have now covered the disadvantages and alternatives of reverse osmosis water. However, it is not always disadvantageous to use reverse osmosis. There are situations wherein the use of reverse osmosis water becomes necessary.

Also Read: Top 5 Waterdrop Filters

Before we dive into what all situations ask for the mandatory use of reverse osmosis, let’s understand how exactly the RO systems work. 

During reverse osmosis, two streams are formed, the solute stream and the solvent stream. In this case, the solvent stream is what is of use to us, as it is the purified drinking water suitable for consumption. The solute stream eliminates all sorts of chemical and organic impurities. 

The reverse osmosis process is an excellent water purification method when the main water issue you are facing is the presence of bacterial and organic contaminants. The reverse osmosis membrane successfully removes all herbicidal or pesticide impurities from water.

While this may be a plus point for reverse osmosis, the downside is that reverse osmosis water may lack certain minerals like calcium, magnesium, iron, etc., that are necessary for human needs. Other than that, they are expensive and have tiresome maintenance considering replacement filters, etc. 

Now, let’s talk about when exactly you should not consider reverse osmosis alternatives. There are some situations where going for a reverse osmosis alternative won’t suffice. Sometimes, the job can only be done by RO filters.

If you’re worried about the lack of minerals in reverse osmosis treated water, remember that there are always several ways to remineralize water.

It is also a fact that most mineral requirements of the human body are tended to by the food intake, i.e. the minerals that are necessary for us are present in the food we consume and is not much dependent on our water intake.

Ensure you are consuming freshly treated reverse osmosis water and keeping up with your hydration needs.

Best Alternatives to Reverse Osmosis: Frequently Asked Questions