Pool Evaporation

Pool Evap ChartTo prevent hundreds of gallons of water from being wasted, MMWD recommends installing a pool cover. Water is lost during the day due to evaporation, and at night, because of evaporation lost through nighttime temperature drop.

To use the chart, measure your weekly water loss at the pool’s tile line (a grease pencil works well to mark the level). Then look up the pool size and amount evaporated on the chart to determine the approximate evaporation loss. For example, 1″ decrease per week from a 16′ x 32′ pool equals 320 gallons of water lost per week.

Please note that this chart does not include “splash out.”

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