How is hard water measured?
Hard water is measured in parts per million (PPM) and how many particles of hardness are dissolved in the water per million particles gives a rating. This rating has been developed over time to the following categories.
|0-50 PPM||Is soft|
|51-100 PPM||Is moderately soft|
|101 - 150 PPM||Is slightly hard|
|151 - 200 PPM||Is moderately hard|
|201 - 275 PPM||Is hard|
|276 - 350 PPM||Is very hard|
|350+ PPM||Is agressively hard|