Why "el" agua?
Although the noun agua ends with an "a" and it is feminine why does it take "la" article?
3 Answers
For the same reason that in English you don't say "a arm", but "an arm": because it doesn't sound right. Do a search. This question has been asked hundreds of times.
Mozge, do some research on the web and you'll find lots of articles explaining why it's "el" agua.
Feminine singular nouns that begin with an emphasized a or ha use the masculine form of the article.