Immuno-compromised people-such as those with cancer undergoing chemotherapy, people with HIV/AIDS or other immune system disorders, some older adults and infants-may be particularly at risk from infections. These people should get advice about drinking water from their health care providers. For more information, contact the EPA Safe Drinking Water Hotline, 800.426.4791 or go to their website, (www.epa.gov/safewater).