Page 14: Guidance For Providing Safe Drinking Water in Areas of Federal Jurisdiction

Appendix H: Bottled Water Dispenser Maintenance

Note: This information can be found on Health Canada's website.

Note: Clean your bottled water cooler before every bottle change.
Unplug cord from electrical outlet of cooler.
Remove empty bottle (carboy).
Drain water from stainless steel reservoir(s) through faucet(s).
Prepare a disinfecting solution by adding one tablespoon (15 mL) household bleach to one Imperial gallon (4.5 L) of water solution.

or

Some companies suggest using one part vinegar to three parts water solution to clean the reservoir of scale before cleaning with bleach. Check your manual.
Note: Other disinfecting solutions may be suitable. Please check with your water cooler supplier/manual.
Pour the bleach/other disinfection solution into the reservoir.
Wash reservoir thoroughly with bleach solution and let stand for not less than two minutes (to be effective) and not more than five minutes (to prevent corrosion).
Drain bleach/disinfection solution from reservoir through faucet(s).
Rinse reservoir thoroughly with clean tap water, draining water through faucets, to remove traces of the bleach/disinfection solution.

Wash hands with soap and warm water before handling. If you choose to use clean protective gloves (ex. latex), discard or disinfect after each use and prior to reuse.
Note: Protective gloves should never replace proper hand washing and hygiene.
Wipe the top and neck of the new bottle with a paper towel dipped in household bleach solution (1 tablespoon (15 mL) of bleach, 1 gallon (4.5 L) of water). Rubbing alcohol may also be used, but must be completely evaporated before placing the bottle in the cooler.
Remove cap from new bottle without touching the surface of the opening to avoid any contamination. Place new bottle on cooler.