General guidelines for classification of waters are.
Average well water hardness.
If your hard water test strip indicates that your water is between 0 3 gpg your water doesn t require softening.
Typically seawater s hardness is in the area of 6 630 ppm 6 63 grams per litre.
Grains per gallon is the business standard approach for talking about water hardness.
Beware of companies that tell you that each ppm of iron is equal to 4 5 grains per gallon of hardness.
60 100 ppm is the currently acceptable hardness level for drinking water in us and canada.
Let s have a look at the following situation.
Water hardness map of the united states water hardness table of classifications and links to more information about water softening and effects.
And more than 180 mg l as very hard.
Now at some point you check the quality of water which you should do every six months for well water.
This explains why almost every region in arizona has very hard water.
Arizona water hardness by city bullhead city has the hardest water in the state with 619 ppm.
What is permissible value for hardness in well water for drinking purpose.
What is the value of hardness.
Lime scale buildup inside a water pipe.
We do not guarantee the water hardness figures are 100 accurate.
Depending on the location and depth of the well the water hardness in these aquifers can range from 200 10 000 ppm.
Water between 3 7 gpg is moderately hard causing spotty dishes and dry skin.
Medium hard 3 7 gpg total grains x 17 1 equals ppm hard 7 10 5 gpg total grains x 17 1 equals ppm extremely hard water 10 5 gpg total grains x 17 1 equals ppm warning.
Water hardness figures are based on reports from government and private sources.
Formula to measure no of grains to be removed.
This is actually the legitimate reason why you might want to adjust the water hardness.
The data in this map comes to provide a general outline of water hardness throughout the usa.
If hardness is in mg l or ppm convert it into gpg by dividing it with 17 1.
61 to 120 mg l as moderately hard.
121 to 180 mg l as hard.
In contrast freshwater has hardness in the range of 15 to 375 ppm.
The average water hardness in each state is based on the specified cities in that state.
Jumping mg l by 17 1 will change it to gpg.
Hard water is packed with minerals at 7 11 gpg and you likely deal with crusty faucets and pipes and possibly reddish rings on your porcelain from excess iron.
A grain of water hardness is comparable to 1 7000th of a pound.