ES293 Chapter Notes - Chapter 3: Methemoglobinemia, Methyl Tert-Butyl Ether, Miscarriage
Document Summary
Diarrheal deaths, most due to waterborne infectious agents,. While the widespread use of oral rehyderation thearphy has substantially reduced the mortality associated with waterborne disease, intensive efforts to provide improve water and sanitary infrastructure in developing nations have been less successful. Growing evidence indicates that updating the means of disposal of human wastes improves human health to a greater extent than purveying clean water supplies. Drinking water is obtained primarily from surface water, such as streams, rivers and lakes or from ground water through artesian or other types of wells. Other means of obtaining water include collecting rainwater, desalinating seawater. Surface water is in general, more prone to contamination by both microbial pathogens and chemicals since it directly receives industrial and municipal wastewater and runoff from the land. Ground water usually less contaminated than surface water because the soil through which it proclates serves as a filter.
