I have no recommendations, but pulled this from the net for you. I do recommend though that whatever system you go go with, make sure there is a remineralization device for your drinking water. A good company will explain to why this is important.
• Culligan of Calgary: Culligan offers undersink reverse osmosis filtration systems that are certified to reduce more than 90 contaminants in drinking water, providing cleaner and safer water directly from the tap. They also provide whole house water filtration solutions that can target specific contaminants like sulfur, iron, sediment, and arsenic.
• Alberta Fresh Springs Water Co.: This company provides RO systems for purchase, with options for self-installation or professional installation. They offer models such as the PureValue and Purotwist Reverse Osmosis systems, with prices starting at $539.95 gst for cash & carry options.
• Pure Water Company: Pure Water Company supplies home reverse osmosis (RO) systems in Calgary, removing contaminants such as chlorine, fluoride, lead, arsenic, and pesticides. They have 15 years of experience in the water treatment field and offer various options to suit different water issues.
• BRM Water Conditioning: BRM Water Conditioning offers residential and commercial reverse osmosis systems, along with other water treatment solutions like water softeners, iron filters, and UV light filtration.
• AquaSource: AquaSource provides reverse osmosis systems that are neatly stored under the counter, offering clean and delicious water from a dedicated tap. Their prices include standard installation, and they serve areas such as Airdie, Banff, Canmore, and surrounding regions.
• PuROTwist: PuROTwist is recommended by some local providers for their high-quality reverse osmosis systems, which are easy to service and maintain. These systems can be installed under the kitchen sink or in the basement and provide filtered water for drinking, cooking, and other household uses.