Don't assume anything. There are websites you can check. There are also local agents on this site (i'm one) who'd be happy to provide the information you want from geological maps of flood areas to which we have access.
I'm right in Hackensack and would be happy to help, if you'd like.
All the best,
Don't assume that the property is not in a flood zone as it's a matter of public record that you or your agent should check for yourselves.
Here is the link to FEMA's website to determine if it lies in a flood zone:
And, you may also wish to try this website: http://www.freeflood.net
Prudential Connecticut Realty