Green chemistry is the design of chemical products and processes that reduce or eliminate the use or generation of hazardous substances. Green chemistry spans the life of a product, from design and manufacture through its final use. The use of less-hazardous substances can potentially reduce the susceptibility of drinking water sources to potential contaminants within its source water protection area. Incorporating green chemistry in business practices; at schools (cleaning practices, chemistry curriculum); and within residential homes can greatly reduce threats to source water.