chloramine testing/treatment

[DRThompson]

Does anyone test for Chloramine in their TAP and R/O?

I know my city uses chloramine in sanitation so today I used my pool kit (Lamotte colorq) to test the TAP water from my house.

Results: mg/L or ppm
Total Cl= 1.94
Free Cl= 0.91

If I subtract the two I get 1.03mg/L which I assume is my Chloramine concentration?

According to the CDC, normal disinfectant chloramine concentrations are from 1-4 mg/L
https://www.cdc.gov/healthywater/dri...infection.html

I tested my R/O the same way and got a chloramine concentration of 0.06mg/L. I use 2 carbons back-to-back and one is a catalytic carbon filter. The filters are about 6 months old and I use (including waste/rejection water) about 500gal per month.

I'm concerned about the limits of my test kit since it loses accuracy below 1mg/L.

Does anyone have a more accurate test kit for free and total Cl- ? Preferably one that doesnt cost $500+

I've noticed an extensive review from Bulk Reef Supply on youtube reviewing the effectiveness of carbon filters on Chloramines.
https://www.youtube.com/watch?v=tEL8KvDr3-k

Has anyone else looked into this?

 

[bertoni]

I'd guess you're right about the chloramine concentration. You could look at the Hach chlorine kit. It might be more precise. I don't know of much data on carbon filter effectiveness except that from various vendors.