|Broadcast area||Northeastern Ontario|
|Branding||CBC Radio One|
|Frequency||99.9 MHz (FM)|
|First air date||May 5, 1978|
|HAAT||120.9 metres (396 ft 8 in)|
|Callsign meaning||Canadian Broadcasting Corporation Sudbury|
|Owner||Canadian Broadcasting Corporation|
|Sister stations||CBBS-FM, CBBX-FM, CBON-FM|
|Website||www.cbc.ca/sudbury - CBC Sudbury|
The CRTC decision authorizing the launch of CBCS in fact encouraged, but did not direct, the CBC to retain an AM frequency for CBC Radio, and to reserve CBCS for its CBC Stereo network. However, the station launched in 1978 as an affiliate of the talk network after the CBC was unable to negotiate an agreement with Cambrian Broadcasting to directly acquire CKSO.
The CBC later applied for a second license for its Stereo network, which was granted in 1984. However, that station remain unlaunched throughout the 1980s, and the CBC was forced in 1991 to surrender all of its non-operating licenses. Consequently, CBC Radio 2 service was not available in the city until the launch of CBBS-FM in 2001.
In the CBC's service reductions announced in March 2009, CBCS was slated to lose half of its existing staff. Several hundred people attended a rally at the city's Tom Davies Square on April 5 to protest the cutbacks, with participants including federal MPs Glenn Thibeault, Claude Gravelle and Charlie Angus, and musicians Kevin Closs and Stéphane Paquette.
In September 2014, the station announced that it would move in late 2015 from 15 Mackenzie Street, where it had been located since its launch in 1978, to a new leased studio and office space on Elm Street. The move was completed in December 2015. The former studio on Mackenzie Street was then rented out to Siena Films as the police station in the 2017 drama series Cardinal.
The station's local programs are Morning North, hosted by Markus Schwabe, in the morning and Up North, hosted by Jason Turnbull, in the afternoon. In May 2009, Morning North won the Radio and Television News Directors Association's Peter Gzowski Award for Best Information Radio Program in Central Canada, and in June 2009, the program won the award for all of Canada.
The CBC announced in August 2014 that Up North, which premiered on August 11, would replace the former afternoon program Points North. The new program extends its coverage to all of Northern Ontario, also replacing Voyage North on CBQT-FM in Thunder Bay.
Former Points North host Dan Lessard retired from the program in June 2010.
In the CBC's proposed new regional programming strategy released in 2005, North Bay was scheduled to receive its own local news bureau, although North Bay would continue to receive CBCS' local programming apart from news updates. As of 2016, however, no separate local news service has been launched in North Bay.
|City of license||Identifier||Frequency||Power||Class||RECNet||CRTC Decision|
|Attawapiskat||CBCA-FM||101.5 FM||34 watts||A1||Query|
|Britt||CBEZ-FM||107.7 FM||49 watts||LP||Query||91-60|
|Chapleau||CBCU-FM||89.9 FM||345 watts||A||Query||86-732|
|Elk Lake||CBCG-FM||89.7 FM||8 watts||LP||Query||84-574|
|Elliot Lake||CBEC-FM||90.3 FM||264 watts||A||Query||88-865|
|Foleyet||CBLF||1450 AM||40 watts||LP||Query|
|Fort Albany||CBCI-FM||102.3 FM||2,400 watts||A||Query|
|Hearst||CBCC-FM||91.9 FM||8,340  watts||B1||Query|
|Kapuskasing||CBOK-FM||105.1 FM||43,900 watts||B||Query|
|Kirkland Lake||CBCR-FM||90.3 FM||2,650 watts||A||Query||84-575|
|Little Current||CBCE-FM||97.5 FM||21,000 watts||B||Query|
|Mattawa||CBLO||1240 AM||40 watts||LP||Query|
|Moosonee||CBEY||99.9 FM||135 watts||A1||Query||2016-233|
|North Bay||CBCN-FM||96.1 FM||100,000 watts||C||Query|
|Sault Ste. Marie||CBSM-FM||89.5 FM||46,000 watts||B||Query|
|Temagami||CBCS-FM-1||106.1 FM||50 watts||LP||Query||2014-570|
|Temiskaming Shores||CBCY-FM||102.3 FM||780 watts||A||Query||96-723|
|Timmins||CBCJ-FM||96.1 FM||44,800 watts||B||Query|
|Wawa||CBLJ-FM||88.3 FM||4,807 watts||B1||Query|
On October 25, 2013, the CRTC approved the CBC's application to decrease the power of CBLJ-FM Wawa from 50,000 watts to 4,807 watts, combined with an increase in the effective height of antenna above average terrain (EHAAT) from 114.6 to 132.6 metres.
On July 4, 2014, the CBC submitted an application to convert CBEU (1340 kHz) Temagami from the AM band to the FM band at 106.1 MHz, which received CRTC approval on November 4, 2014. Temagami's new FM transmitter signed on at 106.1 FM in late 2014 with its new callsign, CBCS-FM-1.
On February 26, 2016, the CBC submitted an application to convert CBEY (1340 kHz) Moosonee from the AM band to the FM band at 99.9 MHz. Its proposed callsign will be CBEY-FM. On June 20, 2016, the CRTC approved the CBC's application to operate an FM rebroadcasting transmitter in Moosonee to replace its existing low-power AM transmitter CBEY Moosonee. The new transmitter will operate at 99.9 MHz (channel 260A1) with an effective radiated power of 135 watts (non-directional antenna with an effective height of antenna above average terrain of 8.97 metres). 
On March 9, 2016, the CBC received CRTC approval to change CBCG-FM's (Elk Lake) transmitter class from low power to regular power A1, increasing the effective radiated power from 8 to 115.7 watts and decreasing the effective height of antenna above average terrain from 71.5 to 54.3 metres.
- "Sudbury Radio History Highlights". Sudbury Living, July 23, 2013.
- CBCS History at Canadian Communications Foundation
- CRTC Decision 84-906
- "Musicians, politicians participate in CBC rally" Archived April 9, 2009, at the Wayback Machine.. Northern Life, April 7, 2009.
- "CBC Sudbury on the move". CBC Northern Ontario, September 12, 2014.
- "15 Mackenzie Street: before and after CBC Sudbury". CBC Sudbury, December 11, 2015.
- "CBC Sudbury's former office transformed into a police station for TV mini-series". CBC Northern Ontario, January 17, 2017.
- Roy MacGregor, "Sudbury shows anger at CBC over nickel-and-diming in regions". The Globe and Mail, May 4, 2009.
- Lara Bradley, "Local CBC wins national award for Morning North". Sudbury Star, July 2, 2009.
- "CBC Radio announces new afternoon drive program servicing Northern Ontario region". Yahoo News, August 11, 2014.
- "Dan Lessard fondly recalls his days at CBC". Northern Life, July 30, 2010.
- Broadcasting Decision CRTC 2013-405, CBCS-FM Sudbury and its transmitter CBCC-FM Hearst –Technical change, CRTC, August 14, 2013
- Broadcasting Decision CRTC 2013-564, CBCS-FM Sudbury and its transmitter CBLJ-FM Wawa; CBVE-FM Québec and its transmitter CBVG-FM Gaspé; and CBAM-FM Moncton and its transmitter CBAM-FM-1 Sackville –Technical changes, CRTC, October 25, 2013
- Broadcasting Decision CRTC 2014-570, CBCS-FM Sudbury - New transmitter in Temagami, CRTC, November 4, 2014.
- 201601873, CBCS-FM Sudbury - Addition of an FM transmitter in Moosonee, CRTC, February 26, 2016
- Broadcasting Decision CRTC 2016-233, CBCS-FM Sudbury – New transmitter in Moosonee, CRTC, June 20, 2016
- Broadcasting Decision CRTC 2016-92, CBCS-FM Sudbury and its transmitter CBCG-FM Elk Lake –Technical change, CRTC, March 9, 2016