After launching in parts of Harlem this summer, New York City is planning to expand a pilot program that enables 911 to dispatch teams that are led by social workers to mental health calls instead of the NYPD. The B-HEARD program will cover all of Harlem by early November before expanding into the Bronx.

But new data released Friday suggests that even as the program’s reach grows, 911 operators still send the overwhelming majority of mental health calls — about three of every four — to police teams. It’s a protocol that New Yorkers with mental illness, their family members and mental health advocates have fought to change in recent years.

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