Bather load refers to the capacity of a municipal swimming bath, a water fountain, or similar facility. Often bather load is dictated by the capacity of water treatment equipment (filters, chemical processing, and the like). Facilities intended only for decoration (i.e. not intended to support a bather load) must maintain a certain minimum standard of water quality, since children often play in, or drink from them.
Bather Load as a Percentage of Population (BLPP)
A certain per capita capacity for bather load is often considered, e.g. on hot summer days, it is desired that there be reasonable capacity in waterplay areas, bathing fountains, and municipal swimming baths, to accommodate the population of potential bathers. Such percentage is expressed as the BLPP.
Bather load, defined as the number of individuals using a pool or spa in a 24 hour time period, bather load being the primary source of bacterial and organic contamination (http://www.spadepot.com/spacyclopedia/tubterms.htm#Bather)
Bather load divided by population yields a percentage that shows the portion of a community able to use the community's pools at any given time. Bather Load as a Percentage of Population (BLPP) (http://www.lib.niu.edu/ipo/ip930719.html)
Batherloads of this size require constant monitoring of disinfectant levels and the use of automatic chlorinators and pH/ORP controllers to.
Batherloads during weekends were typically high and the swim area lacked any appreciable circulation.
It was theorized that the outbreak was caused by direct bather contamination of the swim area which was caused by heavy batherload, inadequate restroom facilities, poor water exchange, and the absence of disinfection.
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