Here is a sample table of the average US water hardness by zip code and city name that we collected for your reference.
|Water Hardness Level||Water Hardness||By Zip Code||By City Name|
|Moderately hard||65 PPM||10045||Manhattan, NY|
|Hard||149 PPM||19102||Philadelphia, PA|
|Moderately hard||119 PPM||20001||Washington, D.C.|
|Moderately hard||68 PPM||02215||Boston, MA|
|Slightly hard||21 PPM||30301||Atlanta, GA|
|Very Hard||219 PPM||33101||Miami, FL|
|Hard||179 PPM||77001||Houston, TX|
|Slightly hard||21 PPM||72901||Phoenix, AZ|
|Slightly hard||47 PPM||94016||San Francisco, CA|
|Very Hard||292 PPM||88901||Las Vegas, NV|
For example, as the table above, the water hardness of the Manhattan, NY is considered Moderately Hard.
Water Hardness Levels Classification
|Mg/L or PPM||Grains/Gal||Hardness Level|
|0 – 17.1||0 – 1||Soft|
|17.1 – 60||1 – 3.5||Slightly hard|
|60 – 120||3.5 – 7.0||Moderately hard|
|120 – 180||7.0 – 10.5||Hard|
|from 180||from 10.5||Very Hard|
Hard Water Solutions
The USA Water Hardness Facts
32% of the cities (about 145 cities or 2730 Zip codes) have Very hard water levels while only 4% (19 cities or 167 Zip codes) have Soft water.
Find Your Water Hardness By Zip Code
There are 2 websites that we consider reliable sources to check the water hardness by zip code for your local area.
One is https://aquasureusa.com/, and the other we cannot mention it here as we are not allowed to.
If you cannot find the results for your area, please leave your zip code in the comment, or contact them directly for an update.
Just follow these 3 simple steps to find your water hardness by zip code.
St2p #1 – Access the websites at https://aquasureusa.com/pages/water-hardness-by-zip-code
Step #2 – Input your zip code or city name.
Step #3 – Hit enter or the search button, and you will get your result instantly.
When you find your water data from the website, don’t miss their disclaimer as all the data is for your reference purpose only.
Water Hardness FAQs
You can find out if your water is hard or soft by testing it, recognizing signs of hard water, or searching for water hardness data by city or zip code.
The water hardness data above will tell you your water hardness level, just select your state by clicking on the state code, and input your zip code or city name to short out your water hardness level.
The data is not fully collected, so if you cannot find the water hardness of your area please leave your comment, and we will check to update it. Thank you.