Cryptosporidium is a microorganism that can cause gastrointestinal illness. Language concerning Cryptosporidium and other microbial contaminants is required in all CCRs and acknowledges the potential increased risk of infection for immunocompromised persons such as individuals with cancer undergoing chemotherapy, persons who have undergone organ transplants, people with HIV/AIDS or other immune system disorders, the elderly, and infants. This language does not indicate the presence of Cryptosporidium in drinking water; these monitoring results, if available, would be reported in a separate section. A guidance document developed jointly by EPA and CDC for reducing overall risk of Cryptosporidium and other types of infection associated with the drinking water for the immunocompromised, is available online by clicking here.
CCR Tips, available at : http://www.epa.gov/ccr