Enter your zip code and see if you live in a hard water area with our water hardness tool. Lots of people live in hard water areas without knowing. How hard is your water?
*Disclaimer: The data in this tool comes to provide a general outline of water hardness throughout the USA. Water hardness figures are based on reports from goverment and private sources. We do not guarantee the water hardness figures are 100% accurate.
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:
|PPM / GPG||WATER HARDNESS|
|0 - 17 PPM
0 - 1 GPG
|17 - 60 PPM
1 - 3.5 GPG
|60 - 120 PPM
3.5 - 7 GPG
|120 - 172 PPM
7 - 10 GPG
|172 + PPM
10 + GPG
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