Where I lived, we also treated with Chloramine.
The raw Lake Michigan water,(pretreatment) entered the treatment plant at a pH of @ 8.4.
After treatment with Chloramine it would drop to 7.6 or at certain seasonal times, 7.2.
I added calcium thiosulfate as a dechloraminator to my tanks during water changes and the pH would rise to @ 8.
Nitrates in the water represent converted ammonia added to turn chlorine, into Chloramine.
In my water treatment facility the ratio was 4 or 5 part chlorine, to 1 part ammonia depending on seasonal organic content to create chloramine.
The treatment ratio where you live may be different, depending on what is needed to make it potable..
Where I lived the ratio showed up as 0.2ppm nitrate on my API test.
Above before dechlorinator, below after.
The raw Lake Michigan water,(pretreatment) entered the treatment plant at a pH of @ 8.4.
After treatment with Chloramine it would drop to 7.6 or at certain seasonal times, 7.2.
I added calcium thiosulfate as a dechloraminator to my tanks during water changes and the pH would rise to @ 8.
Nitrates in the water represent converted ammonia added to turn chlorine, into Chloramine.
In my water treatment facility the ratio was 4 or 5 part chlorine, to 1 part ammonia depending on seasonal organic content to create chloramine.
The treatment ratio where you live may be different, depending on what is needed to make it potable..
Where I lived the ratio showed up as 0.2ppm nitrate on my API test.
Above before dechlorinator, below after.