Treatment of drinking water to improve its sanitary or bacteriological quality is referred to as disinfection. Shock chlorination is one disinfection method employed by public suppliers to reduce bacterial contamination of water. This method also can be used by private-water-well owners.
Dozier, Monty; McFarland, Mark L. (2005). Shock Chlorination of Stored Water Supplies. Available electronically from http : / /hdl .handle .net /1969 .1 /87308.