It happens all the time. You are at a dinner party or chatting with a neighbor in Orange County, and the topic of water comes up. You mention you are thinking about getting a Reverse Osmosis (RO) system under your sink.
Then, someone drops the bomb.
“Oh, don’t drink that! It’s dead water. It leaches minerals from your bones. It’s too acidic.”
Suddenly, you are confused. You just wanted clean water that doesn’t taste like a swimming pool. Now you are worried that filtering your water might actually be bad for your health.
It is a valid concern. After all, water is the most important thing we put in our bodies. You want to make sure you aren’t doing more harm than good.
The short answer? Yes, Reverse Osmosis water is perfectly safe to drink daily. In fact, for many families, it is significantly safer than the tap water coming out of the city pipes.
But the “long” answer is fascinating. It involves understanding how our bodies actually get nutrients, what is lurking in our municipal water supply, and separating internet myths from medical facts.
In this blog, we are going to dive deep. We will strip away the fear-mongering and look at the science of Reverse Osmosis in plain English. By the end, you will know exactly what is in your glass.
What is Reverse Osmosis (And Why Do People Fear It)?
To understand if it is safe, we first have to understand what it is.
Imagine you have a screen door on your house. It keeps out the flies and mosquitoes, but it lets the air in. Now, imagine a screen door where the holes are so incredibly tiny that only air molecules can fit through, not even dust can get in.
That is Reverse Osmosis.
It pushes water through a semi-permeable membrane with microscopic pores (about 0.0001 microns). These pores are so small that they block virtually everything except pure water molecules (H2O).
- Bacteria?
- Lead?
- Fluoride?
- Minerals?
That last one – Minerals is where the controversy starts. Because RO is so good at its job, it removes the “good” stuff (Calcium, Magnesium, Potassium) along with the “bad” stuff (Arsenic, Chlorine, PFAS).
The argument against RO usually sounds like this: “Humans need minerals. RO removes minerals. Therefore, RO makes you sick.”
It sounds logical, but it misses a huge piece of the biological puzzle: Food.
The “Mineral Myth” Busted
Let’s tackle the biggest scary story first: the idea that drinking RO water will make your teeth fall out or your bones weak because it lacks calcium.
The reality is that water is a terrible source of minerals.
While it is true that tap water contains calcium and magnesium (that is what makes the water “hard”), the amounts are tiny compared to what you get from a healthy diet.
Let’s look at the math:
According to nutritional data, an 8-ounce glass of average hard tap water might contain about 20–30 mg of calcium.
- A single slice of Swiss cheese has about 220 mg of calcium.
- A cup of yogurt has about 300 mg.
- A handful of almonds has 75 mg.
You would have to drink gallons and gallons of tap water every single day just to equal the mineral content of a simple breakfast.
The Expert Consensus:
Medical experts and dietitians agree that we are supposed to get our vitamins and minerals from food, not water. Water’s primary job is hydration transporting nutrients, regulating temperature, and flushing out toxins. As long as you are eating a somewhat balanced diet (fruits, veggies, dairy, nuts), the lack of minerals in your water makes virtually zero difference to your overall health.
Minerals in Water vs. Food
| Nutrient | Amount in 1 Liter of Tap Water | Amount in Common Food |
| Calcium | ~30 mg | 1 cup Milk = 300 mg |
| Magnesium | ~10 mg | 1 Banana = 32 mg |
| Potassium | ~5 mg | 1 Potato = 900 mg |
| Sodium | ~20 mg | 1 slice Bread = 150 mg |
Note: Water mineral content varies by location, but the gap remains huge.
The “Leaching” Argument
The second part of the myth is that because RO water is “empty,” it acts like a magnet, stealing minerals from your body to balance itself out.
This is a misunderstanding of human biology.
When you drink water, it hits your stomach first. Your stomach is full of acid and partially digested food. The water immediately mixes with this “soup.” By the time it enters your bloodstream, it is no longer “pure, empty water.” It has absorbed electrolytes from the food in your stomach.
Your body is an incredibly advanced machine. It regulates mineral levels in your blood with extreme precision using your kidneys. Drinking purified water does not cause your body to panic and dump bone density. If that were true, people who drink rainwater (which is naturally very soft and low in minerals) would all have osteoporosis. They don’t.
The Real Danger: What Is In Your Tap Water?
When weighing the risks, you have to ask: What is the alternative?
If you don’t drink RO water, you are likely drinking tap water.
In Southern California, tap water is generally “safe” by federal standards, but “legal” doesn’t always mean “healthy.”
1. The “Forever Chemicals” (PFAS)
You may have seen this in the news. PFAS are man-made chemicals used in non-stick pans and firefighting foam. They do not break down. They stay in the environment forever.
The Environmental Working Group (EWG) has found that these chemicals are present in the drinking water of millions of Americans. Standard carbon filters (like the pitcher in your fridge) often cannot remove them. Reverse Osmosis removes 90–99% of them.
2. Lead and Old Pipes
Even if the water leaving the treatment plant is clean, it has to travel through miles of pipes to get to your house. If those pipes are old, or if the soldering in your home’s plumbing contains lead, it can leach into your glass.
Lead is a neurotoxin. There is no safe level of lead for children. RO is one of the most effective ways to remove lead at the point of use.
3. Pharmaceutical Residue
This is gross, but true. Traces of antibiotics, hormones, and other medications have been found in municipal water supplies. Wastewater treatment plants aren’t designed to filter out prescription drugs. RO membranes are tight enough to block these complex molecules.
The Trade-Off:
So, you have a choice.
- Option A: Drink tap water that has a little bit of calcium, but might also have traces of arsenic, lead, nitrates, and PFAS.
- Option B: Drink RO water that has no arsenic, lead, or PFAS, but also no calcium (which you can get from a piece of cheese).
When you look at it that way, the “safety” choice becomes pretty clear.
The Acidity Concern (pH Levels)
Another common rumor is that RO water is acidic and will mess up your body’s pH balance.
Here is the truth: RO water is slightly acidic. Pure water has a pH of 7 (neutral). When you strip out the alkaline minerals (calcium), and the water absorbs a little carbon dioxide from the air, the pH can drop to around 6.0 or 5.5.
Does this matter? No.
Why? Because your stomach acid has a pH of roughly 1.5 to 2.0.
That is incredibly acidic.
Whether you drink water with a pH of 6 (RO) or a pH of 8 (Tap), the second it hits your stomach, it falls into a pool of hydrochloric acid. Your body then neutralizes the mixture in the small intestine.
Unless you have a very specific medical condition (like severe acid reflux where your doctor has specifically prescribed alkaline water), the slight acidity of RO water has absolutely no impact on your blood pH or overall health.
The Taste Factor: Why Chefs Love It
Safety aside, let’s talk about quality of life.
Have you ever made a cup of coffee or tea with tap water, and it had a weird, oily film on top? That is caused by dissolved solids.
Chefs and coffee aficionados swear by Reverse Osmosis water.
- Cooking: When you boil pasta or make soup, the water reduces. If you start with water full of chlorine and minerals, those flavors concentrate as the water boils off. With RO, your food tastes like the ingredients, not the plumbing.
- Ice Cubes: Ever notice how restaurant ice is clear, but your ice at home is cloudy and white? The cloudiness is trapped gases and minerals. RO water makes crystal-clear, slow-melting ice that doesn’t ruin the taste of your scotch or soda.
The Modern Solution: Remineralization
Here is the best news. You don’t actually have to choose between clean water and mineral water anymore.
The water treatment industry listened to the complaints about “bland” taste.
At Best Home Water Treatment Systems, many of the systems we install now include a final stage called a Remineralization Cartridge (or Alkaline Post-Filter).
How it works:
- The RO membrane strips everything out (bad and good). The water is pure.
- The water flows through a final filter filled with food-grade calcium and magnesium media.
- The water picks up just enough minerals to balance the pH and give it that crisp, refreshing “spring water” taste.
This gives you the best of both worlds: the pharmaceutical-grade purity of RO, with the healthy mineral profile of premium bottled water.
If you are curious about how these specific units work, you can check out Our Products to see the different configurations available for your kitchen.
What About Waste Water?
One valid criticism of RO is that it wastes water. To force water through that tight membrane, some water has to be used to “wash away” the rejected contaminants. In older systems, for every 1 gallon of clean water, you might wash 4 gallons down the drain.
However, technology has improved massively in the last 10 years.
Modern “Permeate Pump” systems and high-efficiency membranes have cut that waste down significantly. In a typical home, the water used by an RO system is roughly equivalent to a couple of extra toilet flushes a day. Considering the hundreds of plastic bottles you are saving from the landfill, the environmental trade-off is often considered a net positive.
Is It Right for Orange County?
If you live in our service area, you know we have “hard” water. We also have a very urban environment where groundwater contamination is a real risk.
A simple pitcher filter or a fridge filter is basically just a “taste and odor” filter. It uses granulated carbon. It will make the chlorine smell go away, but it won’t touch arsenic, fluoride, or heavy metals.
If your goal is purity, if you want to know that when you hand your child a glass of water, it is free from industrial runoff and old pipe debris—Reverse Osmosis is the gold standard.
We often combine these under-sink units with a Whole House Water Conditioner to protect the home’s pipes, giving you a complete “defense system” against water quality issues.
Tips for Daily Use
If you decide to switch to RO, here are a few tips to ensure it stays safe and delicious:
- Sanitize the Tank: Once a year, the storage tank should be sanitized. Bacteria can’t get through the filter, but if they sneak in through the faucet tip, they can grow in the tank. A professional service takes care of this.
- Change the Pre-Filters: The RO membrane is expensive. The pre-filters (sediment and carbon) are cheap. If you don’t change the cheap ones every 6-12 months, the chlorine will destroy the expensive membrane.
- Use it for Cooking: Don’t just drink it. Use it for your rice, your soup, and your baby formula.
The Verdict
Is Reverse Osmosis safe for daily drinking? Absolutely.
It is the standard used by the military, by bottled water companies (Dasani and Aquafina are essentially RO water), and by hospitals.
The fear that it will “deplete” your body is a myth not supported by science. The reality that it removes harmful contaminants like lead and PFAS is a fact supported by data.
If you are ready to ditch the plastic bottles and have pristine water on tap, Best Home Water Treatment Systems is here to help. We understand the specific water chemistry of Orange County. We can test your water, explain your options, and install a system that fits perfectly under your sink.
Water shouldn’t be a source of stress. It should be the simplest, healthiest part of your day.
Frequently Asked Questions
- Can I use Reverse Osmosis water for baby formula?
Yes, and it is often recommended. Because babies are so small, their bodies are much more sensitive to contaminants like lead, nitrates, and fluoride than adults are. Using purified RO water ensures that the only things in the formula are the nutrients you intend to be there. Just make sure to follow the formula instructions for mixing.
- Does RO water dehydrate you?
No. This is another internet myth. Water hydrates you because it is H2O. The lack of minerals does not change the water’s ability to be absorbed by your cells. In fact, because it tastes better and lacks that heavy chlorine smell, most people find they drink more water after installing an RO system, which leads to better hydration.
- How much maintenance does an RO system need?
It is fairly low maintenance.
- Every 6–12 months: Change the Pre-Filters and Post-Filters. (This is a DIY job or a quick service call).
- Every 2–4 years: Change the main RO Membrane.
- That’s it. You don’t need to add salt or chemicals.
- Is RO water safe for pets?
Yes! Many pet owners report that their dogs and cats drink more water when it is filtered. Animals have sensitive noses; they often dislike the smell of chlorine in city water. RO water is perfectly safe and healthy for your furry friends.
- Why does my RO water taste different?
If you are used to hard tap water, RO water might taste “crisp” or “light” to you. Some people describe it as slightly sweet. If it tastes “flat,” that is usually because of the lack of minerals. If you miss that mineral taste, simply ask for a system with a Remineralization cartridge (Alkaline filter) to add that flavor back in.
- Does the system take up a lot of space?
Not as much as it used to. The unit typically consists of a manifold (about the size of a cereal box) and a storage tank (about the size of a basketball). It fits easily under a standard kitchen sink, leaving room for your cleaning supplies. If space is really tight, the tank can sometimes be installed in a basement or adjacent cabinet.
