Thursday, January 17, 2008

General Water Hardness


General Water Hardness
0 to 4 dh 0 to 70 ppm Very Soft
4 to 8 dh 70 to 140 ppm Soft
8 to 12 dh 140 to 210 ppm Medium Hard
12 to 18 dh 210 to 320 ppm Fairly Hard
18 to 30 dh 320 to 530 ppm Hard
>30 dh >530 ppk Very Hard