Municipal water pressure varies from as low as 40 psi to as much as 100 psi. At a hundred psi or greater, you can have very serious plumbing issues, since most pipe and fixtures are not rated for continuous 100 psi usage. Typically the very high pressures only occur if you are near a standpipe or water tower. If you do have high pressure, you can get a pressure reduced installed in the line where the city water main enters your house. As noted in a previous post, 60 psi is considered normal.
But before getting all worked up about it, you should call the City and ask them what pressure they supply to you, they should be able to figure it out from their pressure maps. If it is normal, you have a leaky faucet, and you simply need to fix it, possibly as simple as a new O ring or washer.