If your reverse osmosis system is operating properly, you do not have to boil your water. However, all filters and pre-filters should be replaced and system and storage tank sanitized after the order is lifted. If the boil water advisory lasted for longer than a day, you will need to replace your RO membrane as well.

So, is reverse osmosis water safe during a boil water advisory? Yes and no. Simply put, if you have any reason to believe your RO system may not be capable of effectively filtering contaminated water, don’t risk drinking it when there is a boil water advisory.