according, to Dr. James peterman, "It is extremely important to drink enough (water) every single day." what is correct puncutation

This sentence would have to be corrected to:

According to Dr. James Peterman, it is extremely important to drink enough water every single day.

Explanation:

The last name in this excerpt, (Peterman), needed to be capitalized, as it was a proper noun. A proper noun is the name given to something to make it more specific.

The second part of the sentence need not be in quotes. Use quotation marks with direct quotes, with titles of certain works, to imply alternate meanings, and to write words as words.

The word "water" should not be in parenthesis. Parentheses are used to enclose incidental or extra information, such as a passing comment, a minor example or addition, or a brief explanation. The writer may choose to put additional information within parentheses or to set off the text using dashes or commas.