ENH 424 Lecture Notes - Lecture 2: Hepatitis A, Hepatitis E Virus, Protozoa

• School: Ryerson University
• Department: Environmental Health
• Course: ENH 424
• Professor: Ian Young

Document Summary

Lecture 2 - drinking water legislation, systems, and standards. Disinfection/distribution: usually chlorine is used for primary disinfection, might also include uv or ozone, fluoride may be added to prevent tooth decay, other chemicals can be added to prevent distribution system corrosion. Secondary disinfection: free chlorine, in the form of hypochlorous acid = power disinfectant, low levels maintained in drinking water distribution systems to ensure safety of water after it is treated. 319/08 of hppa: phis conduct risk assessments of sdws according to the sdws risk assessment. Designated facilities: facilities that provide drinking water to people who may be more at risk to illness must follow special requirements. Includes: schools or private schools, health care facilities, children and youth care facilities, day nurseries, childre(cid:374)"s ca(cid:373)ps, delivery agent care facilities such as emergency shelters, e(cid:374)ior"s facilities, social care facilities, universities and colleges.