In Philadelphia at least 220 noncitizens were registered to vote in the 2016 election

From FoxNews.com:

. . . Philly.com reported that 317 such illegal voters have contacted the commission since 2006 to have their registrations canceled. Of those, Schmidt's office said that 220 were registered to vote from 2006 to 2017. Forty-four voted in one election and 46 voted in more than one election.  

"This is a real concern," Schmidt said. "It is harmful to election integrity, and it is harmful to members of the immigrant community who are applying for citizenship. If you've registered to vote in the U.S., and you're not a citizen, it's potential grounds for the denial of your citizenship application." 

Schmidt said that many more noncitizens could have mistakenly registered through the system, both in Philadelphia and elsewhere in Pennsylvania. However, he pointed out that no municipal election was close enough to have potentially been affected by improper voting.  

Schmidt also said that the cases likely did not rise to the level of voter fraud because of the apparent lack of intent by the registrants.  

"All voter fraud is an irregularity; not all voter irregularities are fraud," he said. "Regardless of the intent, the damage is still the same." . . .