There shouldn't be any issue with water at all. If showering or swimming, just be sure to rinse your jewelry off afterwards to remove any soap/chlorine/minerals etc. It’s important to dry it completely afterwards as well. Many of our customers wear their jewelry 24 hours a day and never take them off. You do not need to worry about rusting. For longevity, it may be best if taken off before swimming or showers, if it’s not an issue for you.