Shade ball
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A shade ball is a small plastic sphere floated on top of a reservoir for environmental reasons, including to slow evaporation and prevent sunlight from causing reactions among chemical compounds prese
Shade balls covering a swimming pool at a hotel
Shade balls in the Ivanhoe Reservoir, 2015
A single shade ball
Silver Lake Reservoir
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The Silver Lake Reservoir Complex comprises two concrete-lined basins, Ivanhoe Reservoir and Silver Lake, divided by a spillway, in the Silver Lake community of Los Angeles, California.
Shade ball
…ponds, thus reducing collisions with planes. Starting in mid-2009, the Los Angeles Department of Water and Power (LADWP) put about 400,000 balls in the Ivanhoe reservoir with the main objective of preventing the formation of a carcinogenic chemical, bromate, which forms when sunlight interacts with naturally occurring…
View to the northwest across lower reservoir
Silver Lake Reservoir in February 1956
Looking north
Looking west