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Thread: Average water loss?

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    coffeegoddss's Avatar
    Join Date
    May 2012
    Minooka, IL

    Average water loss?

    What is the average range for evaporation water loss? I was just curious.
    AG, 10,400 gallons, filter cartridge, 2HP pump
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    Richard320's Avatar
    Join Date
    Jan 2010
    San Dimas, CA (LA County)

    Re: Average water loss?

    I generally lose less than 1/2" per day no matter how hot it gets.

    Wind seems to affect it more than temperature.
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    Join Date
    May 2009

    Re: Average water loss?

    We lost about an inch this past week. It was super hot. I notice more loss when the cover is off...for obvious reasons. We keep our pool at 92 or above so at night we probably lose some due to evaporation.
    24' Round Diamond Star, 54" wall height, 200sq ft sta-rite cartridge filter
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  4. Back To Top    #4

    Join Date
    Mar 2007
    San Rafael, CA USA

    Re: Average water loss?

    This map shows annual pan evaporation rates across the country where it's around 55" in Illinois. That would be 0.15" per day, but evaporation is higher in the summer because the pool water is often heated and the air is usually drier. It also depends a lot on wind. I usually double the annual amount for a rough summer limit so that would be 0.3" per day, but actual amounts would usually be less than that.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
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  5. Back To Top    #5

    Re: Average water loss?

    With the intense heat I've been losing probably 1" per week. An average week is somewhere around 1/4-1/2".
    [ Vogue Vectra 24' AG | Hard plumb: Hayward Power-Flo Matrix 1HP 2-speed, 27" sand filter & Pentair MiniMax 100 NG | Taylor K-2006 | Central IL ]
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