|City of license||Sudbury, Ontario|
|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|
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.
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 is scheduled to receive its own local news bureau, although North Bay would continue to receive CBCS' local programming apart from news updates.
|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||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||1340 AM||40 watts||LP||Query|
|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||CBEU||1340 AM (106.1 FM)||40 (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||50,000 watts||B||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. 
- CBCS History at Canadian Communications Foundation
- CRTC Decision 84-906
- "Musicians, politicians participate in CBC rally". Northern Life, April 7, 2009.
- 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.
- CBC Sudbury
- CBCS Sudbury History at Canadian Communications Foundation
- Query the REC's Canadian station database for CBCS-FM