How long can you leave a cup of water sitting out for and still drink it?

The length of time you can leave a cup of water sitting out before it becomes unsafe to drink depends on several factors, including the temperature and humidity of the environment and the type of container the water is stored in.

In general, it is recommended to not leave a cup of water sitting out for more than 24 hours, especially at room temperature. This is because water can become contaminated with bacteria and other microorganisms that can cause illness. Additionally, the water may develop an unpleasant taste or odor over time.

If you must leave a cup of water out for an extended period, there are a few precautions you can take to help reduce the risk of contamination:

- Store the water in a clean, sealed container.

- Place the container in a cool, dark place, such as a refrigerator.

- If you are using a glass container, avoid using one with a spout or lip, as these can be more easily contaminated.

- If you are not sure whether the water is safe to drink, boil it before consuming.

By following these precautions, you can help reduce the risk of drinking contaminated water and protect your health.