RO Water vs Mineral Water: Packaged Drinking Water vs Natural Mineral Water Explained
RO water vs mineral water is one of the most common questions Indian consumers ask — and the answer matters more than most labels let on. If you've ever noticed labels that say "natural mineral water" instead of just "packaged drinking water," you're already asking the right question.
Prefer plastic-free? Read our guide to Himalayan mineral water in aluminium cans.
RO Water vs Mineral Water: The Quick Answer
RO (reverse osmosis) water is municipal or borewell water that has been stripped of minerals and contaminants by an RO membrane, then disinfected. Most "packaged drinking water" sold in India is RO water.
Natural mineral water is sourced from a protected underground spring or aquifer, bottled at source, and undergoes no chemical treatment. Its minerals — calcium, magnesium, bicarbonates — are naturally present, not added back.
In short: RO water is treated water. Natural mineral water is untouched water. They are legally different categories under FSSAI, and they taste, hydrate and impact the planet differently.
From how they're sourced and treated, to their taste, health benefits, and environmental footprint, the gap is wide.
Legally, There Are Only Two Types of Bottled Water in India
Under Indian food safety laws (FSSAI regulations), all bottled water sold in India must fall into one of two categories:
- Packaged Drinking Water
- Natural Mineral Water
So whether a label says "pure water," "RO water," or "spring-inspired," it still belongs to one of these two categories. Knowing which one you're drinking makes all the difference.
What Is Packaged Drinking Water in India? (And Why It's Different)
Packaged drinking water is usually purified water sourced from:
- Borewells
- Municipal taps
- Tankers
To make it safe for consumption, it undergoes extensive treatment:
- Reverse Osmosis (RO) to remove dissolved solids and contaminants
- UV or Ozone Disinfection to kill bacteria
- Optional Remineralisation to improve taste (in rare cases, and only when the label mentions 'added minerals')
While safe to drink, this water is stripped of its natural minerals. It often tastes flat or slightly metallic, and its origin is usually unclear.
Popular packaged drinking water brands in India: Bisleri, Kinley and Aquafina
What Is Natural Mineral Water? (And Why It's Better Than RO Water)
Natural mineral water is fundamentally different, both in how it's sourced and how it's handled.
It comes from a protected underground spring or aquifer and is bottled at the source. The water flows through layers of rock and earth, naturally absorbing minerals like:
- Calcium
- Magnesium
- Bicarbonates
Under FSSAI regulations, natural mineral water must:
- Come from a naturally protected geological source
- Maintain a stable mineral composition
- Undergo no treatment other than particle filtration
No reverse osmosis. No chemical disinfection. No artificial mineralisation. Just clean, untouched water, and you can taste the difference.
Natural mineral water is a great alternative to RO-treated packaged water, offering safe, mineral-rich hydration from a single, protected source.
Examples of natural mineral water: Evian, Perrier and reform
Technical Comparison: Packaged Drinking Water vs Natural Mineral Water
| Parameter |
Packaged Drinking Water |
Natural Mineral Water |
| Source |
Borewell, municipal, tanker |
Protected spring or aquifer |
| Treatment |
RO, UV, ozone, optional remineralisation |
Minimal filtration only |
| TDS (mg/L) |
Often < 50 |
150–400+ (naturally present) |
| Calcium (mg/L) |
< 10 (added artificially) |
20–100+ (naturally occurring) |
| Magnesium (mg/L) |
< 5 |
10–50+ |
| Bicarbonates (mg/L) |
< 10 |
100–300+ |
| pH |
Neutral (6.5–7.5), no gut impact |
Slightly alkaline (7.4–8.5), supports digestion |
| Taste |
Flat or metallic (from RO) |
Crisp, smooth, slightly sweet |
| Mineral Profile |
Synthetic or variable |
Naturally stable |
Why Natural Mineral Water Is Better:
- Higher natural mineral content = more hydration
- Alkaline pH supports digestion and gut health by reducing acidity
- Traceable origin = consistent quality and safety
- No artificial processing = no chemical residue or flat taste
- A more sustainable alternative to RO water
Is Packaged Drinking Water Just Recycled Water?
In most cases, yes.
Most packaged drinking water in India is sourced from municipal water supplies or tankers, filtered, disinfected, and then bottled. This process removes all natural nutrients and makes it difficult to trace the original source.
Natural mineral water, on the other hand, is always first-use water. It is drawn directly from protected sources, where it has been naturally filtered for years or even decades.
Health Benefits of Natural Mineral Water
- Boosts Hydration: Electrolytes like calcium, magnesium, and potassium help the body absorb and retain water.
- Supports Heart Function: Magnesium and calcium regulate blood pressure and support cardiac rhythm.
- Strengthens Bones: Naturally sourced calcium supports bone mineralisation and strength.
- Improves Digestion: Alkaline pH helps reduce acidity and support gut health.
- No Chemical Residue: No RO or artificial additives = cleaner taste and no synthetic trace.
Environmental Impact: Not Just About the Bottle
Groundwater Depletion
Packaged drinking water plants often rely on borewell extraction, leading to groundwater stress and falling water tables in urban areas.
RO purification wastes up to 3 litres of water for every 1 litre produced.
Plastic Pollution
Most packaged drinking water comes in single-use plastic bottles, which:
- Rarely get recycled in India
- Break down into microplastics
- Pollute landfills, rivers, and oceans
Natural Mineral Water: A Cleaner Choice
Natural mineral water brands like reform:
- Follow strict extraction controls
- Operate near protected ecosystems
- Package water in infinitely recyclable aluminium cans
Aluminium is a more sustainable alternative. It is endlessly recyclable without loss in quality.
So, What Is reform?
reform is India's premium natural mineral water, sourced from a protected Himalayan aquifer and packaged in plastic-free aluminium cans.
We don't filter out the good stuff: no RO, no chemicals, no plastic.
You'll find reform in premium settings across India, from private clubs and eco-conscious corporate offices to boutique retail stores, plastic-free zones like the Nilgiris, and premium sports facilities.
We're here to rethink how India hydrates, with quality, traceability, and care for the planet.
Final Thoughts: Flip the Bottle Before You Drink
Next time you pick up a bottle of water, ask:
- Where is it from?
- What's in it?
- What is it packaged in?
Because once you understand the difference between packaged drinking water and natural mineral water, there's no going back.
FAQs About Bottled Water in India
Q: Is packaged drinking water the same as RO water?
A: In most cases, yes. Packaged drinking water in India is purified through reverse osmosis (RO), UV, and ozone, and often comes from municipal or tanker sources.
Q: What qualifies as natural mineral water?
A: Natural mineral water must be sourced from a protected aquifer, have stable natural mineral content, and undergo no chemical treatment, as per FSSAI guidelines.
Q: Which is better for health: RO water or natural mineral water?
A: Natural mineral water contains essential electrolytes like calcium and magnesium, which support hydration, digestion, and bone health, making it a healthier choice for regular consumption.
Q: Is reform a natural mineral water brand?
A: Yes. reform is a premium natural mineral water brand in India, sourced from a Himalayan aquifer and packaged in plastic-free aluminium cans.
Q: Is RO water bad for you?
A: RO water is safe to drink, but reverse osmosis strips out beneficial minerals such as calcium and magnesium. Drinking demineralised water as your only daily source means missing out on minerals that natural mineral water provides.
Q: Which is the best natural mineral water brand in India?
A: For natural mineral water packaged plastic-free, reform is sourced from a protected Himalayan aquifer and delivered in 100% recyclable aluminium cans. Other established mineral water brands in India include Himalayan and Bisleri Vedica.
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