Water is みず, not みづ.
The particle と is used to connect two or more nouns/noun phrases/noun clauses. "The dictionary form of verbs + と" is a conditional clause, meaning "when/if".
(私[わたし]は)すしを食[た]べると、いつも水[みず]を飲[の]みたくなります。
I always want to drink water when eating sushi.
The -te form or the -masu stem of verbs is used for the case.
I always drink water and sometimes eat sushi.
私はいつも水を飲んで、ときどきすしを食べます。
私はいつも水を飲み、ときどきすしを食べます。