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Thread: Safe chlorine level to swim

  1. #1
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    Safe chlorine level to swim

    I did a little searching trying to figure out what is a safe level to swim. I know my ideal ranges are between 5-9 with my cya level.

    I remember growing up and having to stay out of my neighbors pool because they shocked it with who knows what.

    I know if i am between the 5-9 range i am fine but what if i shock it because i let it get below 5 on me and I take it up to 18. Or when I try to get to my high of 9 I go over. Is there a general rule of when its ok to go in?

    If all goes well we will be back in the pool tomorrow.

    Thanks for all the guidance and the great pool school.

    Mike
    Kidney shaped ~ 10000 gallon Ig Plaster pool with pool cage. 120sf Cartridge filter. Pentair WhisperFlo WFDS-26, 230 Volt, 7.8/3.0 Amp, 1-1/2 Horsepower 2 speed pump, Solar panels on the roof. Heliotrope HelioMatic 4000D solar controller.

  2. #2
    Mod Squad Butterfly's Avatar
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    Re: Safe chlorine level to swim

    You will get different opinions on this; however, at our house, we feel it is okay if the FC is below the shock level for your CYA.

    Just one more reason for folks to have a good test kit and know what their numbers really are!
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

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  3. #3
    Senior Member Casey's Avatar
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    Re: Safe chlorine level to swim

    I agree with the difference in opinion on this very subject.

    My dad ran a public pool and kept the chlorine at 10-12 ppm every day and we swam there every summer as children with no problems. I had asked him once I got my pool what's the highest ppm we could swim at and he gave me that answer.

    When I shock my pool, I will allow the pool to be swam in the next day. I have yet to see any issues with doing so, so that's what I do. I would imagine it would be anywhere from 12-15 ppm.

    The kids haven't melted yet.
    ~Sharkline~DE~Borated~

  4. #4
    Administrator JasonLion's Avatar
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    Re: Safe chlorine level to swim

    The safe chlorine level varies with the CYA level. The higher the CYA level, the higher an FC level you can swim in. Indoor public pools are known to use FC levels up to 5, with a CYA level of 0. That is a far far higher effective chlorine level than you will ever see in an outdoor pool that uses CYA.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    TFP Admin. Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  5. #5
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    Re: Safe chlorine level to swim

    The kids havent melted yet. ROFL!
    WV Girl

    Custom "L" shape IG gunite pool, 36K gal., main drain, 2 skimmers, 3 returns, hayward heat pump, hayward 1.5hp pump with booster pump, ozonator, 4 cartridge filter.
    one dear hubby, two waterlogged kids, and lots of good times!

  6. #6
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    Re: Safe chlorine level to swim

    Quote Originally Posted by dlduvall
    The kids havent melted yet. ROFL!
    So as long as the kids are not melting I am good. Which one should I use to test? The 10 year old or the 7 year old. And do girls have an faster melt point then boys. See you answer one question and open the doors to other. lol

    In all seriousness, I was thinking as long as the chlorine is below my shock point we are probably ok. Thanks for the reassurance.
    Kidney shaped ~ 10000 gallon Ig Plaster pool with pool cage. 120sf Cartridge filter. Pentair WhisperFlo WFDS-26, 230 Volt, 7.8/3.0 Amp, 1-1/2 Horsepower 2 speed pump, Solar panels on the roof. Heliotrope HelioMatic 4000D solar controller.

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