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Thread: When is it ok to swim

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    When is it ok to swim

    When is it not safe to swim in a pool? What chlorine level is too high to swim in?
    16 x 38 inground pool, 20K gal, vinyl liner, 0.75 HP Hayward Superpump (SF 1.0, 115 V), Hayward Pro Serier Top Mount 24" sand filter (300lbs sand) with 62GPM design flow fate and 3.1 sq ft effective filtration area, Kreepy Krawly cleaner

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    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: When is it ok to swim

    It all depends on your CYA level, see the Chlorine / CYA Chart at Pool School. Anything between the minimum and shock level is safe to swim as long as the PH is between 7.2 and 7.8, the water is clear, and there isn't any visible debris or other obvious organic contamination.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  3. Back To Top    #3

    Join Date
    Feb 2008
    Denton, TX

    Re: When is it ok to swim

    We don't recommend swimming in a pool that has a FC at or above shock level. This isn't to say that it isn't safe to swim in. It very well may not be, but we don't recommend it.

    On the flipside, it is absolutely unsafe and even dangerous to swim in a pool where there is not enough chlorine present to kill harmful bacteria.

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