|City||Halifax, Nova Scotia|
|Frequency||100.1 MHz (FM)|
|Slogan||Today's Best Music|
Halifax's Best Music
|Format||Hot adult contemporary|
|Owner||Bell Media |
(Bell Media Radio)
First air date
|November 1, 1977|
Call sign meaning
|HAAT||185.1 meters (607 ft)|
CIOO-FM is a Canadian radio station, broadcasting at 100.1 FM in Halifax, Nova Scotia. The station uses the on-air brand name C100. It was owned by Toronto based CHUM Limited until that company's buy-out by CTVglobemedia in 2007, and then Bell Media in 2011. CIOO's studios are located at the intersection of Russell and Agricola Streets in Halifax (right behind sister station CJCH-DT), with its transmitter located on Washmill Lake Drive in Clayton Park.
In 1976, Radio 920, Ltd., a division of CHUM Limited, applied to the Canadian Radio-television and Telecommunications Commission for a new FM radio station broadcasting at 100,000 watts with a dial position of 100.1 MHz. This would be the third FM radio station in Halifax after FM stations CBH-FM and CHFX-FM. Radio 920, Ltd. also owned CTV affiliate CJCH-TV and CJCH-AM. The CRTC subsequently approved the application.
On November 1, 1977, CIOO began broadcasting as an easy listening station. As a new decade approached, CIOO changed its programming format to album rock. This gave the listeners an opportunity to hear more than just the top 40 hits from a particular artist, such as other songs not yet on AM radio. In 1983, CHUM Limited tested a simulcast project. A new TV station, ASN, had aired in the province. Together with CIOO, they would air Atlantic Canada's Choice - a radio/TV program, hosted by Geoff Banks, counting down the week's best albums from 20 to 1. This lasted until spring 1985, where the station again reformatted its programming.
The spring of 1985 saw the station take on another programming angle, Top 40 along with oldies, such as the Beach Boys among others. This format was phased out not long after, when the station moved towards adult contemporary. The station ran such slogans as "Lite Rock...Less Talk", "Great Light Rock Hits" and "...Even More Lite Rock Hits". CIOO moved to its current Hot AC format in 1993. Like most Hot AC stations in Canada, CIOO leans rhythmic, though not as heavy as sister station CHUM-FM/Toronto. With sister station CJCH-FM adopting a Rhythmic/Dance Top 40 presentation by 2013, CIOO has modified its playlist towards a conventional Adult Top 40 direction. New sister stations since 2013 are Truro-based CKTY-FM and CKTO-FM.
Long before the Breakfast Club, the station used one DJ personality. Geoff Banks hosted the morning show for the better part of the 1980s, before Biggs took over and shortly thereafter forming the show they have today.
CIOO formerly broadcast the radio version of the MuchMoreMusic countdown, but stopped airing it sometime in 2007.
C100 brands itself as playing the most music for Halifax  with:
Every Year on New Year's Eve, C100 plays the top 100 songs of the radio stations of that year.