These charts are from the Pew Research Center. They questioned 3,487 Americans nationally between October 1st and 13th, and their survey has a 2.2 point margin of error.
It shows that a fairly substantial majority of the public (58%) thinks Donald Trump did some things that provide grounds for impeachment, while only 41% say he has not. About 54% approve of the House conducting an impeachment inquiry, while 44% do not.