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General Category => Ingredients => Topic started by: Steve Ruch on January 19, 2015, 10:55:14 PM

Title: chlorine evaporation rate
Post by: Steve Ruch on January 19, 2015, 10:55:14 PM
How long do you have to leave water with chlorine setting out before the chlorine is gone?
Title: Re: chlorine evaporation rate
Post by: denny on January 19, 2015, 11:10:25 PM
What I always hear is "overnight".
Title: Re: chlorine evaporation rate
Post by: a10t2 on January 20, 2015, 02:54:31 PM
If you're brewing with it, not at all. Heating the water to strike temperatures will drive off essentially all the chlorine.

If you have *chloramines* in the water, which most big utilities have switched to, then you'll have to treat the water chemically. One Campden tablet will treat 20-60 gal of water depending on the concentration.
Title: Re: chlorine evaporation rate
Post by: Steve Ruch on January 20, 2015, 10:15:35 PM
If you're brewing with it, not at all. Heating the water to strike temperatures will drive off essentially all the chlorine.

If you have *chloramines* in the water, which most big utilities have switched to, then you'll have to treat the water chemically. One Campden tablet will treat 20-60 gal of water depending on the concentration.

The local water company mentions chlorine and not chloramines.
Title: Re: chlorine evaporation rate
Post by: Steve Ruch on January 20, 2015, 10:16:47 PM
What I always hear is "overnight".
I set out a five gallon bucket of water and the next day I couldn't detect any chlorine.
Title: Re: chlorine evaporation rate
Post by: EHall on January 22, 2015, 09:21:51 PM
setting it in the sun will evaporate it faster too.
Title: Re: chlorine evaporation rate
Post by: leejoreilly on January 22, 2015, 09:53:23 PM
setting it in the sun will evaporate it faster too.

What is this "sun" thing of which you speak? Certainly not a thing that is seen in Michigan during wintertime...
Title: Re: chlorine evaporation rate
Post by: Steve Ruch on January 22, 2015, 10:15:23 PM
setting it in the sun will evaporate it faster too.

What is this "sun" thing of which you speak? Certainly not a thing that is seen in Michigan during wintertime...
It's due to make it's January appearance in my neck of the woods either tomorrow or the next day.