Complex sentence: 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.
Split into simpler sentences: A certain per capita capacity for bather load is often considered. For example, on a hot summer day, it is desired that there be reasonable capacity in waterplay areas, bathing fountains, and municipal swimming baths, to accommodate the population of potential bathers.