Chaudiere-Appalaches is even more conservative. Hashemite hinted towards why on his blog.
True enough and that interestingly enough was the only area in the last federal election that went Conservative. However the areas to the west, Mauricie, or areas to the East, Charlevoix, are less Conservative and likewise on the south side of the St. Lawrence so is centre du Quebec and Bas Saint Laurent. Chaudiere-Appalaches is without question Quebec's most right wing area. And the suburb part makes some sense. Ottawa sort of follows this pattern at least on the Ontario side. In other capital cities the suburbs are obviously more conservative, but that is generally the case in pretty much every city. For example Vancouver is the same and even Toronto (since despite being a capital the percentage who work for the government is not that high).