(Salem, OR)  --  A "do not drink" water advisory in Salem is expected to remain in effect for at least two more weeks.  Officials say testing shows levels of toxins from an algal bloom in the water distribution system are above EPA advisory levels for vulnerable groups.  Those considered vulnerable would be children, pregnant women, those with compromised immune systems and pets.  The advisory applies to Salem, Turner, Suburban East Salem Water District and Orchard Heights Water Association.