Spring Water vs Distilled Water What Sets Them Apart

Australians fill water bottles, refill reusable flasks and weigh up the merits of various labels at the supermarket every day. Walk down the beverage aisle at Woolworths in Brisbane or Coles in Adelaide and the choice is genuinely confusing: spring water, distilled water, purified water, mineral water and sometimes filtered tap water all sit side by side.

Understanding what separates spring water from distilled water is more than a trivia question. The differences shape how each type tastes, what it contains and whether it suits a particular task, whether you are filling a baby's bottle, topping up a steam iron or packing a drink for a bushwalk in the Blue Mountains. The guide below walks through the origins, chemistry and practical uses of each so the next bottle you grab is the right one for the job.

Where Spring Water Comes From

Spring water is sourced from an underground formation where water flows naturally to the surface. In Australia, producers draw from protected boreholes or natural springs, often in regional catchments such as the foothills of the Great Dividing Range, the Adelaide Hills or parts of rural Victoria. Because the water moves through layers of rock, it absorbs trace minerals along the way, picking up small amounts of calcium, magnesium and sodium.

Regulation under the Australia New Zealand Food Standards Code requires that bottled spring water be clearly identified and that its source be traceable. Brands such as Mount Franklin, Spring Valley and Cool Ridge source from named springs and label their bottles accordingly. The result is water that has not been heavily treated and that retains the mineral signature of the rock it passed through.

For many households, spring water offers a familiar, lightly mineralised taste that feels closer to natural well water than to what comes out of a kitchen tap. Campers, hikers and families planning a weekend at a national park often reach for a bottle of spring water because it is widely available, recognisable and refreshing on a hot summer day, particularly when you are preparing for outdoor activities like how to start a fire in a fireplace or campfire safely and want a quick drink on hand.

How Distilled Water Is Made

Distilled water is produced through a deliberate purification process. The water is boiled into steam, and the steam is collected and condensed back into liquid in a separate clean chamber. Anything that does not evaporate, including minerals, salts, bacteria and most chemical contaminants, is left behind in the original boiling vessel.

Commercial distillers, including the machines sold for home use across Australia, run the same basic cycle in a closed system, repeating the boil-and-condense process to reach very high purity. Laboratory-grade distilled water is even further refined, sometimes with additional deionisation steps before bottling.

Because of its purity, distilled water has a flat, almost empty taste when drunk on its own. Some people find it slightly metallic because the absence of minerals makes the water feel thin on the palate. Others prefer that neutrality, especially when they want to use the water purely as a base for coffee, herbal teas or steam inhalations, where extra minerals could leave scale in equipment.

Mineral Content and pH Differences

The biggest scientific distinction between spring and distilled water lies in what each one carries. Spring water typically contains between 50 and 500 milligrams per litre of total dissolved solids, depending on the source. Distilled water, by contrast, holds fewer than 10 milligrams per litre, often close to zero.

This affects not only flavour but also pH. Spring water tends to sit in the neutral to slightly alkaline range, usually between 7 and 8, thanks to the buffering effect of calcium and bicarbonate ions leached from rock. Distilled water is more sensitive to its surroundings; once exposed to air, it absorbs carbon dioxide and drifts towards a mildly acidic pH of around 5.5 to 6.5.

For most healthy adults in Australia, these differences do not pose any nutritional concern. The minerals in spring water contribute only a tiny fraction of daily intake compared with a balanced diet. The choice between the two comes down to intended purpose, taste preference and how the water will interact with appliances, plants or laboratory tasks.

Taste, Feel and Everyday Drinking

Taste is where many Australians form their loyalty to one type of water over the other. Spring water, with its light mineral load, feels crisp and rounded on the tongue. Distilled water tastes soft but oddly empty, which is why some describe it as bland or slightly plastic-like, a perception that often comes from the bottle itself rather than the water inside.

Drinking distilled water daily is generally safe for short periods, but very low-mineral diets combined with heavy distilled water consumption have been linked in some overseas studies to altered fluid balance. Health authorities such as the National Health and Medical Research Council in Australia recommend tap water as the primary daily drinking water for the general population, simply because it is affordable, well regulated and supplemented with fluoride in most major cities including Sydney, Melbourne and Perth.

If you prefer bottled water for taste or convenience, spring water is usually the more enjoyable everyday option. Distilled water is better reserved for specific jobs where purity matters, such as topping up car batteries, filling humidifiers or mixing certain medications that require a clean base.

Practical Uses Beyond the Glass

Beyond drinking, the two types of water serve very different purposes around the home. Distilled water is the clear winner in any appliance where mineral buildup is a problem. Steam irons, CPAP machines, neti pots and laboratory glassware all benefit from water free of calcium and magnesium, because those minerals leave white scale inside heating elements and tubes.

Spring water, with its mineral content, is generally fine for most household tasks but can shorten the life of sensitive equipment if used repeatedly. For watering indoor plants, brewing coffee in a regular drip machine or filling pet bowls, the minerals are harmless and may even be beneficial for plants that appreciate a little calcium.

For cleaning, many Australians are shifting towards gentler homemade solutions, and the type of water you choose plays a quiet role in how well those solutions work. Hard tap water can leave streaks on windows and dull the shine on benchtops, while softer water lets vinegar, bicarb and citrus-based mixes do their job without interference. Readers interested in formulating their own sprays and pastes can explore detailed recipes for natural cleaning products that pair particularly well with low-mineral water for a streak-free finish.

Storage, Cost and Environmental Footprint

Storage needs differ slightly between the two types. Spring water is best kept in a cool, dark place and consumed before the printed use-by date, particularly once the seal is broken. Distilled water, free of minerals that could feed microbes, keeps very well in clean sealed containers for long periods, which is why chemists and laboratories stockpile it.

Cost is another consideration. A two-litre bottle of spring water at a typical Australian supermarket runs from around one to three dollars, while distilled water in a similar size is often a little more expensive because of the energy required to produce it. Buying in larger four-litre or twenty-litre jugs brings the per-litre price down and is common in clinics, workshops and salons.

Environmentally, both bottled options carry a plastic footprint, and many Australian households are turning to refillable bottles, under-sink filters and rainwater tanks to cut down on packaging. If you already collect rainwater in suburban Perth or a coastal NSW town, running it through a simple carbon filter gives you something close to spring water for the cost of a tap, while a small home distiller can supply distilled water for appliances without producing empty plastic bottles each week.

Choosing between spring water and distilled water is really about matching the water to the moment. Reach for spring water when you want a refreshing, slightly mineralised drink, whether at the office in Canberra, on a hike in Tasmania or at a backyard barbecue. Choose distilled water when you need a pure, predictable base that will not leave deposits in a steam iron, a humidifier or a piece of lab equipment. Look for the Australian Bottled Water Institute certification mark on the label, and remember that under local food standards the description must accurately reflect what is inside. Spring water will say so, distilled water will say so, and anything claiming to be "purified" is usually filtered tap water rather than either of these specific categories. With a clear sense of what each type offers, the next bottle you pick up at the shop becomes a deliberate choice rather than a guess, and the water in your glass, kettle or appliance ends up being exactly the right match for what you are doing today.