ABSTRACT
D ISINFECTION is a process (usually chemical) that deactivates virtually all recognized pathogenic microorganisms, but not necessarily all microbial life. The disinfection process accomplishes two things. Primary disinfection initially kills Giardia cysts, bacteria, and viruses. Secondary disinfection maintains a disinfectant residual that prevents regrowth of microorganisms in the water distribution system (see Figure 8.1).
