MattArmstrong
Member
Has anybody seen credible and scientific explanations of why "Seattle" tap water drops in pH after sitting/aging for a day or so?
I asked this on another forum and didn't get great answers. I'm curious if wafishbox folks know the answer, especially since this pertains to the soft "Seattle" water that many of us have.
Many people that "age" their tap water before water changes observe a pH rise. Most often this is explained by off gassing of CO2. I'm finding that my water drops from 8.0 -> 7.5. What might explain this? Infusion of CO2 from the ambient air?
My municipal water treatment facility (Seattle Public Utilitie's Tolt facility) uses Lime (CaO) and CO2 to buffer the water up to KH 2. From some reading, I think these two combine into the other carbonates that make up KH. This might imply that the water comes out my tap with less CO2 than would be the case if it were in equilibrium with air -- if a lot of it combines with the CaO to form things like Calcium Carbonate (CaCO3).
Just a guess. I've not seen this discussed much.
I asked this on another forum and didn't get great answers. I'm curious if wafishbox folks know the answer, especially since this pertains to the soft "Seattle" water that many of us have.
Many people that "age" their tap water before water changes observe a pH rise. Most often this is explained by off gassing of CO2. I'm finding that my water drops from 8.0 -> 7.5. What might explain this? Infusion of CO2 from the ambient air?
My municipal water treatment facility (Seattle Public Utilitie's Tolt facility) uses Lime (CaO) and CO2 to buffer the water up to KH 2. From some reading, I think these two combine into the other carbonates that make up KH. This might imply that the water comes out my tap with less CO2 than would be the case if it were in equilibrium with air -- if a lot of it combines with the CaO to form things like Calcium Carbonate (CaCO3).
Just a guess. I've not seen this discussed much.