is it illegal to carry a pepper spray on the street?

check the laws in your area, otherwise i wouldn't think so if it is there for your own protection

it depends on what state you live in.
you can check with your local police department

In some places, but it isn't a big deal and they'll usually only take it away from you.

I TREALLY DEPENDS ON THE STATE. IN MICHIGAN IT IS IAGAINST THE LAW GO TO YOUR STATES WEBSITE. FOR INSTANCE MY STATES IS WWW.MICHIGAN.GOV

Varies with state and city. It is illegal in some states and cities, legal in others. Call your local police department and ask them.