Hi there! European Portuguese
1. A água está fria. / A água é fria.*
2. A água não está fria.
3. A água está fria?
4. [Eu] bebo água todos os dias.
5. Ela bebe água todos os dias.
6. [Eu] estou a beber água agora.
7. [Eu] bebi água ontem.
8. [Eu] vou beber água amanhã. / (form.) [Eu] beberei água amanhã.
9. [Eu] quero beber água.
10. [Eu] não quero beber água.
11. [Eu] quero que ela beba água todos os dias.
Sentence notes:
1. Just to highlight the 2 possibilities, there are 2 "to be" verbs in Portuguese and most Latin languages, one for temporary states and another for facts or permanent states. If you're talking about a particular water, it would be the first sentence, the most frequent construction is with "estar".
8. Usually the future tense is not used, I wrote first the way speakers would convey the same meaning, and with a formal annotation I wrote the literal future tense.
4,6,7,8,9,10,11 - the subject is not mandatory. If it's a dialogue it would be supressed. If it's writing sentences with no context, like example sentences, usually we leave the subject. The sentence is correct with or without one.