0.001
< 0.05
It is the permissible limits for water quality laid down as standards by United States Public Health Drinking Water Standards.
< any thing that is a liquidation so it can leak through if it's solid then it can't be filtered
6.0-8.5
300 umho-1
4.0-6.0 ppm
500 ppm
5 ppm
10 pc/L
1000 pc/L
3 pc/L
1. Coliform cells. 2.Total bacteria count