Bottled water--how can we know it's safe to drink?

How do we know that the bottled water we are drinking is safe?  When you are drinking bottled water (at home or while travelling the world), look for the words “reverse osmosis” or “distillation” or “filtration with an absolute 1 micro filter”  Any of these terms describe water treatment methods of the highest quality.  These three water treatment methods should protect you and your loved ones from water-borne bacteria and even Cryptosporidium, a parasite which can cause gastrointestinal (GI) symptoms.  For people who are immunocompromised (with weakened immune system), these three types of water treatments are recommended by CDC as preventing illness and possibly being lifesaving.  More information can be found at CDC, Commercially Bottled Water, http://www.cdc.gov/healthywater/drinking/bottled/