Water Hardness

hard water measeured
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
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