Does tap water go bad?
Tap water can be stored and consumed for up to 6 months with minimal risk of adverse side effects as long as it has been stored properly.
However, tap water that has been carbonated can become flat as the gas slowly escapes from the liquid, resulting in changes in flavor.
Regular water can also develop a stale taste over time, which is caused by carbon dioxide in the air mixing with the water and making it slightly more acidic.
Though these types of water may have an off taste, they’re still generally considered safe to drink for up to 6 months.
If preparing tap water for storage, use cleaned and sanitized food-grade water containers. Label them with the filling date and indicate that they contain drinking water. Store the containers in a cool, dry, and dark place for up to 6 months.
Tap water can be kept for up to 6 months. Though its flavor can change over time, it’s still considered safe to drink if properly stored.