your question has little to do with the average canadian nurse, many of whom have no idea what ielts is. this post more properly belongs in the interantional forum, as per the notice at the top of the home page for the canadain forum, which says, "posts pertaining to working in canada and/or immigration or licensure questions specific for canada, please post it under the international forum
." i will be moving you there.
applying for registration in a province based on your ielts score isn't a wise choice. you really should consider where you want to live, how much you can afford for day-to-day living costs, how likely you are to be successful in becoming registered and so on. you should have a look at registration requirements posted by each province on their college of nurses' websites, found here: http://allnurses.com/canadian-nurses...es-303171.html
to see what your chances are. both alberta and manitoba have competence assessments that many iens are required to participate in prior to being authorized to apply for registration.
you will find that british columbia has toughened up its language fluency requirements effective july 1, 2011. the previous standard, which you currently meet, will change to a minimum
score of 7.0
overall and for speaking and writing, a minimum of 7.5
for listening and 6.5
for reading. the only testing scores that will be accepted are those from celban and ielts. there can be no combining of scores. i expect that other provinces will follow bc's lead fairly soon.