What is LPFM?

Low Power FM stations (LPFM) are community-based, non-commercial radio stations that operate at 100 watts or fewer. LPFM stations allow local broadcasters to serve their local communities. They address the interests of specific groups including neighborhoods, people of color, trade unions, and religious and linguistic communities, and provide a forum for news and debate about important local issues. Historically, community-based low power radio stations have been an important part of radio broadcasting. However, in 1978, the FCC put a freeze on issuing these low wattage licenses. This policy was reversed in 2000.

This info and more found here: http://www.civilrights.org/publications/low-power/what-is-lpfm.htm