Yes. Water from a properly maintained reverse osmosis system is safe to drink every day, and it is one of the most thorough point of use treatments a household can buy. The questions worth asking are not about safety in principle but about maintenance, because a neglected RO unit is the one way this equipment stops doing its job.
What the membrane actually does
Reverse osmosis pushes water through a semi permeable membrane whose pores are small enough to reject dissolved salts, metals and most organic molecules along with anything particulate. What passes through is water with a very low dissolved solids content. Vendors sell these as multi stage units combining sediment and carbon prefilters, the membrane itself, and a final carbon polish, because the prefilters exist to protect the membrane from chlorine and grit.
The mineral question, answered honestly
RO removes beneficial minerals along with the unwanted ones, and that is the objection you will read most often. In practice, dietary calcium and magnesium come overwhelmingly from food rather than from drinking water, so the loss is small. If the flat taste bothers you, a remineralizing cartridge added after the membrane puts a little calcium and magnesium back and restores mouthfeel. That is a taste decision, not a safety one.
The two real risks: neglect and stagnation
An RO system fails quietly. A chlorine saturated carbon prefilter stops protecting the membrane, and a membrane past its life keeps producing water while rejecting less and less of what it should. A storage tank left unused for weeks can also grow bacteria on the wetted surfaces. Both are managed the same way: change prefilters on schedule, replace the membrane on the maker's interval, sanitize the system at membrane changes, and flush the tank after a long absence.
Confirming it is still working
You cannot see whether an RO unit is performing. A cheap TDS meter is the practical check: measure the feed water and the product water at install, note the difference, and repeat every few months. When the gap narrows meaningfully, the membrane is done. Our best RO water systems guide covers the stage layouts and how the tank, faucet and drain connection go together.
Questions people ask about is ro water safe to drink
Is RO water safe for babies and formula?
RO water is low in dissolved solids and free of most contaminants, which is why it is commonly used for formula, but follow your pediatrician's advice on preparation.
Does RO water need to be remineralized?
Not for safety. A remineralizing stage is added mainly for taste, since dietary minerals come largely from food rather than from drinking water.
How do I know my RO system is still working?
Compare feed and product water with a TDS meter every few months. When the difference shrinks, the membrane is worn out and should be replaced.