Well, it depends, but about half of your bodyweight in ounces per day is a good baseline.
If you’re drinking far less than that, it’s probably not enough.
If you’re drinking twice that much or more, it may be too much.
Other pertinent questions that might help uncover more are:
How often are you peeing?
How often are you thirsty?
Is it possible that sometimes, when you think you’re hungry, you’re actually thirsty?
How physically active are you?
If you’re constantly thirsty, and drinking lots of water, and continually excreting it out then that (lack of absorption) could be a sign of a deeper problem.
I start every day off with a big mason jar of water, which also contains a pinch of Celtic Sea Salt (for minerals), the juice of one fresh squeeze lemon (for pH balance), and a full serving of organic chlorella/spirulina tablets (myriad of vitamins, minerals, and detoxification benefits) just to get on the right track.