Micropur is now the standard water "treatment" method used by U.S. Military, Boy Scouts, Sierra Club, and State Departments of Health for emergency preparedness. Micropur MP-1 is the only water purification tablet that is EPA registered as a Microbiological Water Purifier to inactivate all protozoa (like Cryptosporidium and Giardia), bacteria (like E Coli and Salmonella) as well as viruses (Hepatitis and Norwalk virus).