I guess we all have to agree that ''water'' being around for so long is a neccassity of living ..........
I will quote// a few lines on why 'water' is beneficial other then just drinking it.
Water as a symbol of life as well as a means of cleansing,
is of particular importance in the Old Testament (see Reymond, L’eau, sa Vie, et sa Signification dans l’Ancien Testament).
It was created on the first day (Genesis 1:2, 6-8).
The Spirit of God was hovering over the face of the waters (Genesis 1:2).
The earth was founded upon the waters (Genesis 1:6-7, 9-10).
God commanded the water to bring out an abundance of living souls (Genesis 1:20-21).
In some sense the element is close to God (cf. Psalms 17; 28:3; 76:17, 20; 103:3; 148:4).
God is compared with the rain (Hosea 6:3). Water brings life (cf. Exodus 15:23-35; 17:2-7; Psalms 1:3; 22:2; 41:2; 64:10; 77:20; Isaiah 35:6-7;
58:11), and joy (Psalm 45:5).
According to Old Testament Law, it cleanses defilement (Leviticus 11:32; 13:58; 14:8, 9; 15-17; 22:6; cf. Isaiah 1:16),
and is used in sacrifices (Leviticus 1:9, 13; 6:28; 1 Kings 18:30-39), in which context the Bible mentions the living water (Leviticus 14; Numbers 5;
as can be seen from the stories of Naaman the Syrian cured from his leprosy in the waters of Jordan (2 Kings 5:1-14),
and the annual miracles at Bethesda in Jerusalem (John 5:1-4).
John the Baptist used the waters of the Jordan to cleanse people’s sins which might echo some Jewish customs (Matthew 3:1-6; Mark 1:4-5; Luke
3:2-16; John 1:26-33).
Even Christ came to be baptised (Matthew 3:16; Mark 1:10).
On the other hand, water is also the habitat of serpents whose heads God crushed (Psalm 73:13-14),
and of the dragon (Job 41:25; Psalm 103:26).
This is the belief common in the Old Testament that water is a mystically powerful element which, being connected with God in some way, can cleanse
sins, defilement, and renew the human being. Water has taken on the religious symbolism of life.
The New Testament integrates the Old Testament belief.
The Old Testament symbolism of water actually prefigures the new baptismal mystery.
Christ says that water is a means to a new spiritual birth into the kingdom of heaven (John 3:5).
He gives living water which is the source of eternal life (John 4:10-14; 7:38; cf. Jeremiah 2:13).
Christ comes in water, blood, and Spirit, witnessing to one God (1 John 5:6-8).
He commands watery baptism in the name of the Father, the Son, and the Holy Spirit (Matthew 28:19).
When speaking about baptism, Paul states that in water we are buried with our sins in the likeness of Christ’s death:
We were buried with Him through baptism into death, that just as Christ was raised from the dead by the glory of the Father, even so we also should
walk in newness of life (Romans 6:4).
there's lot's more ......