Lee Valenzuela, a board member with the National Plasterers Council, walks past one of several pools at Cal Poly used in a study to determine the effectiveness of pool covers to reduce evaporation.
Lee Valenzuela, a board member with the National Plasterers Council, walks past one of several pools at Cal Poly used in a study to determine the effectiveness of pool covers to reduce evaporation. Joe Johnston jjohnston@thetribunenews.com
Lee Valenzuela, a board member with the National Plasterers Council, walks past one of several pools at Cal Poly used in a study to determine the effectiveness of pool covers to reduce evaporation. Joe Johnston jjohnston@thetribunenews.com

Pool covers could cut evaporation by 95 percent, Cal Poly study shows

January 19, 2016 03:16 PM

UPDATED January 20, 2016 01:05 PM