Distilled water is drinkable. It is water that has been boiled to steam and condensed back to liquid, leaving behind everything that does not travel with the vapor, which means minerals, metals, salts and most contaminants. What that process gives you is very pure water with a flat taste, and what it takes is time, energy and the mineral content of ordinary water.
What distillation actually removes
Boiling water and condensing the steam separates it from anything that stays behind in the boiling chamber. That covers dissolved minerals including the calcium and magnesium that make water hard, heavy metals such as lead, salts, nitrate, and any bacteria, which do not survive the boil. It is one of the most thorough separations available to a household. The gap is volatile compounds that boil at or below the temperature of water, since those travel with the steam and condense along with it, which is why home distillers usually include a small carbon filter on the outlet to catch what the boil could not.
Why it tastes flat, and what that means
Taste in water comes largely from dissolved minerals and dissolved gases. Distillation removes the minerals and the boil drives off the gases, so what condenses tastes noticeably flat compared to spring or tap water. Many people dislike it. Some households aerate it by pouring between jugs, which puts some gas back. The mineral question comes up constantly and is worth stating plainly: calcium and magnesium in drinking water are a minor contribution next to what comes from food, and questions about individual mineral intake belong with a clinician rather than with a water page. What a water report can tell you is what is being removed, not what a person needs.
Where distilled water is the right choice
The strongest cases are not for drinking at all. Steam irons, humidifiers, CPAP machines, car batteries and aquarium top ups all benefit from water with no minerals to deposit as scale or residue. For drinking, distillation makes sense when the supply has a problem the household wants comprehensively removed and other treatment is impractical, or in an emergency where a stove and a way to condense steam is what is available. As a routine drinking water source it is slow, uses a lot of energy for the volume produced, and produces a taste most households have to adapt to.
Comparing it with what comes out of your tap
Before assuming distilled water is an upgrade, find out what you are upgrading from. Every community water system publishes an annual Consumer Confidence Report and the EPA maintains a finder for them, so a city household can read what was measured rather than guessing. Well owners need their own laboratory test. If the report is clean and the complaint is chlorine taste, a carbon filter at the kitchen tap solves it for far less effort. If a specific dissolved contaminant is the concern, an under sink reverse osmosis unit removes most of the same things a distiller does, continuously and without the energy cost, which is why it is the more common household choice.
Questions people ask about is it ok to drink distilled water
Does distilled water leach minerals from the body?
That claim circulates widely and is not something a water quality page can settle. Dietary questions belong with a clinician, while what distillation demonstrably does is remove minerals from the water itself.
Can I use distilled water in a coffee maker?
You can, and it will not scale the machine, but many coffee makers and brewing guides prefer water with some mineral content for extraction and taste. It is ideal for steam irons and humidifiers.
Is distilled water the same as purified water?
Not quite. Purified is a broader label covering distillation, deionization and reverse osmosis, so a purified bottle may have been produced by any of those processes.
Is a home distiller better than reverse osmosis?
It removes a similar range but far more slowly and with much higher energy use. Reverse osmosis produces water continuously under the sink, which is why most households choose it.