Only 38 percent of New York City voters believe Mayor Bill de Blasio is performing well as their chief executive -- his lowest marks ever as mayor, according to a Wall Street Journal/NBC4 New York/Marist College poll released Tuesday.

De Blasio's job approval numbers tumbled from 44 percent in May.

And while the Democrat continues to enjoy more support from his political base of minority voters than white voters, his favorability rating among black voters fell to 50 percent from 59 percent and to 37 percent from 49 percent among Latino voters, according to the poll.

Voters are split on whether de Blasio -- who is nearly two years into his mayoralty -- deserves re-election. The poll showed 42 percent say he should be voted back into City Hall, while 49 percent disagree.

The poll -- conducted from Oct. 25 to Thursday -- questioned 926 adults via landline and cellphone. It has a margin of error of plus or minus 3.2 percentage points. The sample included 650 registered voters with a margin of error of plus or minus 3.8 percentage points.

De Blasio spokeswoman Karen Hinton did not respond to a request for comment.

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Half of residents surveyed disapprove of the mayor's handling of crime and 41 percent said overall quality of life has deteriorated in the past year.

But asked whether de Blasio understands their concerns and works hard, a majority of voters -- 59 percent and 60 percent -- said yes.

A separate Quinnipiac University survey Thursday showed 45 percent of voters approve of de Blasio's job performance and 46 percent disapprove. A Quinnipiac poll in August showed his disapproval rating at 44 percent.