Stop paying 2,000% more for water you can make at your own kitchen sink. Get crystal clear, purified water on demand.
The Short Answer
Yes — a properly installed reverse osmosis system removes up to 99% of microplastics from your drinking water. RO membranes have pores as small as 0.001 microns. The average microplastic particle is 1–5 microns. The math is straightforward.
Bottled water? Studies have found microplastics inside the bottles — not just in tap water. The plastic cap alone sheds particles every time it’s twisted open.
Quick comparison:
| Reverse Osmosis | Bottled Water | |
|---|---|---|
| Microplastics removed | Up to 99% | Adds microplastics from bottle/cap |
| PFAS (forever chemicals) | Yes | Not guaranteed |
| Lead & arsenic | Yes | Varies by brand |
| Annual cost (family of 4) | ~$100–200/yr after install | $500–$800+/yr |
| Convenience | On-demand from your tap | Store runs, storage, recycling |
| Environmental impact | Minimal | Thousands of plastic bottles/yr |
Are You Paying for Water, or Just the Plastic?
If you’re lugging heavy cases of bottled water home every week, you’re not alone. Many homeowners in Maryland, Washington DC, and Northern Virginia rely on bottled water because they don’t trust their tap water, or they dislike the taste of chlorine.
But here’s something most people don’t know: much of the “purified” bottled water you buy is simply municipal tap water that has been run through Reverse Osmosis — the exact same technology you can install under your kitchen sink for less than the cost of one year of bottled water.
When you buy a case of Dasani or Aquafina, you aren’t paying for special water. You’re paying for plastic manufacturing, trucking fuel, warehouse storage, and marketing. Then you’re drinking from a container that may be leaching the very microplastics you were trying to avoid.
Does Bottled Water Contain Microplastics?
Yes — and the research is alarming.
Studies have detected microplastic particles in virtually every major bottled water brand tested. One widely cited analysis found up to tens of thousands of microplastic particles per liter in common bottled water brands. A major source: the plastic cap. Every time you twist the lid, it sheds microscopic plastic fragments directly into the water.
Compare that to a home reverse osmosis system, which filters water on demand — seconds before you drink it, through a membrane with pores smaller than any microplastic particle.
Unsure what’s in your local water supply? Our free water testing service checks for microplastics, PFAS, lead, bacteria, and dozens of other contaminants specific to your home.
Does Reverse Osmosis Remove Microplastics?
Yes. Reverse osmosis is one of the most effective methods available for removing microplastics from drinking water.
Here’s why: an RO membrane has pores approximately 0.001 microns in size. Microplastic particles — even the smallest detected in drinking water — are typically 1 micron or larger. That’s a 1,000x size difference. Microplastics simply cannot pass through an intact RO membrane.
The multi-stage process works like this:
- Sediment pre-filter — removes dirt, rust, and large particles that could clog the membrane
- Carbon pre-filter — removes chlorine, chloramines, and chemicals that affect taste and can degrade the membrane
- RO membrane — the core stage; removes microplastics, PFAS, lead, arsenic, nitrates, fluoride, and dissolved solids
- Carbon post-filter — polishes the final water for taste
- Optional remineralization stage — adds beneficial calcium and magnesium back in if desired
The result is water that’s cleaner than virtually any bottled water on the market — made fresh at your tap, with no plastic packaging involved.
Is Reverse Osmosis Water Safe to Drink?
Absolutely. Billions of people drink RO-filtered water daily. It’s the same purification process used in hospitals, laboratories, and by the bottled water brands you already trust.
A common question is whether RO removes too much — specifically, whether removing minerals makes the water unhealthy. The honest answer: the minerals in tap water are present in very small quantities and most people get their mineral intake from food, not water. If you prefer mineral-enriched water, we can add a remineralization cartridge to your system at installation.
What RO does reliably remove includes:
- Microplastics and nanoplastics
- PFAS / PFOA (forever chemicals)
- Lead and arsenic
- Chlorine and chloramines
- Nitrates and bacteria
- Fluoride
- Dissolved solids (TDS)
One note: RO systems do not add anything to your water. “Is RO water banned in Europe?” is a question we see online — the answer is no. Some European countries have guidelines around remineralizing RO water in certain commercial settings, but home RO systems are widely used and recommended throughout Europe and globally.
Cost: RO System vs. Buying Bottled Water
This is where the math becomes impossible to ignore.
Bottled water cost (family of 4):
Buying the recommended daily water intake in bottles costs most families $500–$800+ per year — and that’s before factoring in the time spent shopping and the space used storing cases.
Reverse osmosis cost:
An under-sink RO system is a one-time installation. After that, annual filter replacements typically run $100–200 per year — and you get unlimited purified water on demand, 24 hours a day.
For a full breakdown of what an RO system costs to install in the DMV area, see our Reverse Osmosis System Cost Guide.
The bottom line: Most families recover the cost of installation within 12–18 months compared to buying bottles. Over 5 years, the savings easily reach $2,000–$3,000+.
What About Whole House Reverse Osmosis?
An under-sink RO system filters water at one tap — typically your kitchen sink. For most families, this covers all drinking and cooking water.
If you want purified water at every tap in the house — including showers and laundry — a whole house reverse osmosis system is an option, though it’s a more significant investment. Read our honest breakdown of whole house RO pros and cons before deciding.
The Convenience & Environmental Case
Beyond cost and safety, there’s the day-to-day reality:
- No more store runs for water cases
- No more pantry storage for bulky bottles
- No more recycling bin overflowing with plastic
- No supply chain dependency — when a local water crisis hits, your RO system keeps running
That last point matters in the DMV. We’ve seen firsthand how quickly municipal supplies can be compromised — as with the Potomac River sewage spill. When a boil water advisory is issued, bottled water disappears from store shelves within hours. A home RO system gives your family an independent, reliable source of purified water regardless of what’s happening upstream.
Switching to RO also eliminates thousands of single-use plastic bottles per year from entering landfills and waterways in the Chesapeake Bay region — a meaningful environmental impact for families serious about reducing their plastic footprint.
Reverse Osmosis vs. Bottled Water
Does reverse osmosis taste like bottled water?
Yes. RO membranes have pores of approximately 0.001 microns — far smaller than any microplastic particle. Independent studies and Water Quality Association testing confirm that properly maintained RO systems remove up to 99% of microplastics. This makes RO one of the most effective solutions available for microplastic removal in a home setting, more effective than standard pitcher filters, refrigerator filters, or carbon-only systems.
Is bottled water full of microplastics?
Research suggests it can be. Studies have detected microplastics in the majority of bottled water brands tested, with some samples containing tens of thousands of particles per liter. The plastic bottle itself and the cap are major sources — physical friction when opening the bottle sheds microscopic particles directly into the water. In contrast, an RO system filters water on demand through an inert membrane with no plastic contact during filtration.
Is reverse osmosis water better than bottled water?
For most households, yes — on every practical measure. RO water contains fewer contaminants, costs significantly less over time, produces no plastic waste, and is available on demand without shopping trips. The main trade-off is the upfront installation cost, which for an under-sink system typically pays for itself within 1–2 years compared to buying bottles.
Does reverse osmosis remove PFAS (forever chemicals)?
Yes. The RO membrane rejects PFAS/PFOA compounds, which are too large to pass through the membrane pores. PFAS contamination is a growing concern in many MD, DC, and VA water supplies — particularly in communities near military bases or industrial sites. A water test can confirm whether PFAS are present in your home’s water.
Does RO water taste like bottled water?
Very similar — because many bottled water brands use RO themselves. The crisp, clean taste comes from the removal of chlorine, dissolved solids, and other compounds that affect flavor. Some people find RO water slightly flat if they prefer the taste of mineral water; a remineralization cartridge added to the system restores that mineral taste.
Is RO water banned in Europe?
No. This is a common misconception online. Reverse osmosis systems are widely used in homes and businesses across Europe. Some European food safety guidance recommends remineralizing RO water used in certain commercial food production settings, but home RO systems are fully legal and commonly recommended throughout Europe.
Stop Buying Bottles. Start Filtering.
If you are ready to save money and enjoy unlimited purified water right from your tap, National Water Service is here to help. We have been the trusted water experts in Maryland, DC, and Northern Virginia for over 47 years.
