Packaged Drinking Water: How Is It Made and Bottled?

You pick up a bottle at a railway station, a wedding or your office pantry. You twist the cap, take a sip and never think about it again. But that clear water has been on quite a journey before it reached your hand.

So what actually happens inside a packaged drinking water plant? Is it just tap water in a bottle? Who checks it? This guide walks through the whole process in plain language, from the source to the sealed cap, and shows you how to read a bottle like someone who knows what to look for.

What Is Packaged Drinking Water?

Packaged drinking water is water from a source such as a borewell, municipal supply or surface water that has been treated, disinfected and then sealed in a bottle or jar. The treatment can include filtration, reverse osmosis (RO), UV light and ozone, depending on the plant.

It is not the same as natural mineral water. In India, packaged drinking water follows the Indian Standard IS 14543, while natural mineral water follows IS 13428. Mineral water comes from a natural underground source and keeps its natural minerals. Packaged drinking water can start from any source, but it must be purified to a safe standard before it is bottled.

How Packaged Drinking Water Is Made, Step by Step

Think of it as a series of gates. Each one removes something the water should not carry into the bottle.

1. Source water collection and testing

Everything starts with raw water, most often from a borewell. Before treatment begins, the plant tests it so the team knows what needs to be removed. Water that is high in salts, for example, needs stronger treatment than water that is already fairly clean.

2. Pre-filtration

The water first passes through sand and activated carbon filters. Sand traps visible particles and mud. Carbon takes out chlorine, odour and many organic compounds that affect taste. This step also protects the expensive RO membranes that come next.

3. Reverse osmosis (RO)

This is the heart of the process. Water is pushed at high pressure through a very fine membrane. The membrane lets water molecules through but holds back most dissolved salts, heavy metals and other tiny impurities. What comes out is very pure water. What stays behind is flushed away as reject water.

4. Balancing the water

RO removes a lot, including some minerals the water naturally carries. Because of that, some brands adjust the pH or add a small, controlled amount of minerals for taste and balance. Not every plant does this, so it is worth reading the label.

5. Final disinfection with UV and ozone

Before bottling, the water gets one more safety layer. UV light damages the DNA of germs so they cannot multiply. Ozone, a form of oxygen, is dissolved into the water to kill bacteria and viruses, and then it breaks back down into plain oxygen. Many plants also use a fine polishing filter right before filling.

How the Water Is Bottled

Clean water is only half the job. If the bottling is careless, all that purification is wasted. A good plant treats the filling area almost like a clean room.

After this, samples from each batch go to the plant’s quality lab. A batch should only leave the factory after it passes.

Who Checks Packaged Water in India?

Packaged drinking water is treated as a food product, so FSSAI (the Food Safety and Standards Authority of India) oversees it. Every manufacturer needs an FSSAI licence.

The rules have changed recently, and it helps to know the latest picture. FSSAI removed the mandatory BIS certification mark requirement for packaged drinking water and mineral water in October 2024. It then introduced a Scheme of Testing that took effect on 1 January 2026, and it now places packaged water in the “high-risk” food category. In simple terms, there is less paperwork around a mark, and more regular testing and inspection. IS 14543 continues to serve as the technical reference for quality.

How Austiva Makes Its Water

At Austiva, the water is treated using reverse osmosis (RO) and the brand is FSSAI certified. It is available in 250 ml, 500 ml and 1 L packs, so you can pick a size for a gym bag, a meeting or a family dinner.

How to Read a Packaged Water Label

You do not need a lab to make a smart choice. Check these four things before you buy:

• FSSAI licence number. It should be clearly printed on the bottle.
• Batch number and dates. Look for the packing date and the best-before date.
• An intact seal. If the cap seal is broken or loose, put the bottle back.
• Storage condition. Bottles kept in hot sun for long periods are best avoided. Heat is hard on plastic and on water quality.

FAQ

Is packaged drinking water just filtered tap water?

Not exactly. Some plants may use municipal water as a source, but it goes through several treatment steps and testing before bottling. The result should be very different from what comes out of an ordinary tap.

Is RO water safe to drink every day?

RO water is widely used for drinking across India. Because RO removes many dissolved salts, some people prefer water with balanced minerals. Your diet usually supplies most of the minerals your body needs, so for most healthy adults RO treated water is fine.

How long can I keep a sealed bottle?

Check the best-before date on the label. Store sealed bottles in a cool, dry place away from direct sunlight.

How can I tell if a packaged water brand is trustworthy?

Look for a valid FSSAI licence number, clear batch and date coding, and a tamper-proof seal. A brand that is open about how it treats its water is usually a good sign too.

The Bottom Line

Packaged drinking water goes through source testing, filtration, reverse osmosis, UV and ozone disinfection, careful filling and batch testing before it reaches you. Every step is there for one reason: the water in your bottle should be safe.

The next time you reach for a bottle, check the label, check the seal and pick a brand that is clear about how it makes its water. Looking for clean, RO treated and FSSAI certified drinking water? Explore Austiva’s range.