Nextdoor, the company for creating private social networks accessible only to your local neighbors, has had a lot of people join since it first launched in 2011: More than 14,100 neighborhoods have been created on the site, and on average 100 new neighborhoods are being added each day. But today Nextdoor is set to announce a new user that’s special — the Big Apple itself.

Today, New York City Mayor Michael Bloomberg is set to announce a partnership with Nextdoor to adopt the service as a citywide communications tool. At the moment, the Mayor’s office is the first to sign on for using Nextdoor to communicate with NYC citizens about things like neighborhood safety issues, natural disasters, and local events. Other NYC city services are set to roll out use of the site in the coming months.

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