Yup, it’s possible. You can fuck up your electrolyte balance by drinking excessive amounts of water.

Believe it or not, you can even die from drinking excessive amounts of water. It’s rare and you’d have to try pretty hard to do so, but it’s more than possible.

https://en.wikipedia.org/wiki/Urine#Color

Urine also has a smell. You don’t notice it when just pissing into a bowl of water, but if you let it sit for hours and hours it can become gross.