Bests & Worsts Reviews from Amazon

I tested the quality of my tap water and was alarmed when I received a 322ppm rating. I purchased this assuming it would help purify my water. I filled and emptied this pitcher 4 times with the carbon filter and then reassessed the water - I received inconsistent reading199-220ppm. Ideal drinking water should be 0-50ppm and carbon filtration should produce water 50-100ppm. Did I just get a bad filter?? Brita seems to be a reliable brand. Also, make sure you check the measurements of your fridge. Two of our fridge shelves are adjustable and this still wouldn’t fit, so I had to take one shelf out.