Water quality post-filtration

[Tommy's Brew]

I have the water quality parameters from my municipal supply and due to chloramine in the water, I am running it through a Culligan EZ-4 filter system. After filtration, I do not know if the water quality parameters required in the brew water calculator (Ca, Mg, etc.) have changed in comparison to the inlet conditions from the municipality. I assume I'll have to get an independent lab to test it post-filtration. Is this correct or does someone have a better solution?

 

[Ozarks Mountain Brewery]

if possible get it tested after filtration, but for a quick and easy substitute do a ph test and adjust just to get by

 

[LevanteJim]

You'll need to send samples to the same company that tested your water pre-filtered.
Testing the pH post filtration won't provide a gauge on Ca, Mg, SO4, Na etc...