New York City Mayor Michael Bloomberg and New York Governor George Pataki announced the plan at a city hall press conference last week.
Edelman PR Worldwide and tech agency Company 39 are spearheading the effort, which is slated to go on indefinitely, and was recently allocated a £1.3m budget.
The campaign centres on a website - www.lowermanhattan.info - providing information on transportation, health, rebuilding plans, community assistance and outreach.
Edelman and Company 39 are promoting the website and campaign through grassroots outreach PR and advertising.
Flyers and posters promoting the website are already being hand-distributed throughout New York City.
Funding for the project is being drawn from disaster-assistance funds provided by the Federal Emergency Management Agency, and is jointly administered by the Mayor's Office and the Lower Manhattan Development Corporation.
Deputy mayor for economic development and rebuilding Daniel Doctoroff told PRWeek: 'It has been designed to offer information to anyone with an interest in what's going on in Lower Manhattan.
'We think it will become an invaluable tool,' he added.