Chloride levels of 33ppm


Lifetime Charter Member
Lifetime Member
Jan 5, 2009
Washington, DC
:confused: I started to look into chloride because I know it's an essential nutrient for plants but it's absent from CSM+B Plantex. No problem, the range of chloride listed on my water quality report for this area is 16 to 85ppm. So it got me wondering;
are they talking about sodium chloride or just the anion? If it's the anion, is it just hanging out by itself?

Is chloride left out of trace mixes like CSM+B Plantex because it's often found in water systems at high levels?

Will high levels of chloride cause problems with the uptake of other mineral nutrients, such as K+, Ca2+, and Mn2+ or is it that just sodium?

Anyway, I thought it would be good to get the 411 on chloride.
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Lifetime Charter Member
Lifetime Member
Mar 12, 2009
As far as my understanding goes, chloride is so persistent in most systems that it's taken care of by the tap water anyhow. In the case of very soft water, you can add CaCl2 and take care of both your calcium and chlroride at the same time.

I really don't know if they're just talking about sodium chloride; you'd have to ask them. KCL is a common fertilizer, so I'd imagine they'd want to test for it given the effect that irrigation runoff has in some areas. Best bet is to call them.

Chlorine relates to osmosis, so you'd probably see the usual chain of deficiencies that happen to a broadly nutrient deficient plant.

Tom Barr

Staff member
Jan 23, 2005
I've had well over 300-400ppm of Cl- without issues.
I had a lot of other ions, very hard nasty water etc.

Tom Barr