What is Hard Water?

A Look at Hard Water Across the US

An overwhelming 85 percent of the USA has hard water, so the likelihood that you live in state or city with hard water is high. The following hard water map illustrates the varying zones of hardness across the USA.

Map Summary

This map displays hard water measured in grains per gallon across the United States. The higher the grains per gallon, the harder the water. Generally, the map can be broken into six regions of the U.S., with the following grains per gallon measurements:

West Coast

(WA, OR, CA, NV, AZ)

3-14 Grains per Gallon (slightly hard – very hard)

Rocky Mountains

(ID, MT, WY, UT, CO)

3-14 Grains per Gallon (moderately hard – very hard)

Midwest

(ND, SD, NE, KS, OK, MN, IA, MO, WI, IL, MI, IN, OH, KY)

10-15+ Grains per Gallon (very hard – extremely hard)

Gulf Coast

(NM, TX, LA, AR, MS, AL, FL)

3-15+ Grains per Gallon (slightly hard – extremey hard)

East Coast

(GA, TN, VA, WV, MD, DE, NY, RI, CT, VT, ME)

3-10 Grains per Gallon (slightly hard – hard)

Hawaii

3-7 Grains per Gallon (moderately hard)

Alaska

3-14 Grains per Gallon (moderately hard – very hard)

Top Cities with Hard Water

  • San Antonio, TX
  • Tampa, FL
  • Minneapolis, MN
  • Jacksonville, FL
  • Indianapolis, IN
  • San Jose, CA
  • Las Vegas, NV
  • Kansas City, MO
  • Phoenix, AZ
  • Salt Lake City, UT

Did You Know?

Ancient seabeds covered most of the US, which left high concentrations of limestone in the ‘hard’ to ‘extremely hard’ regions.

85% of people have hard water. 30% of these people use a water softener.

Want to learn more? Watch this video:

Audio: When making home improvements, a water softener is a pretty easy appliance to overlook.
Visual: Blue title screen with clouds with the title ”Signs You Need a New Softener” with warning sign and EcoPure logo

Audio: Unless the color of it mimics something from
Visual: Three different sized green softeners on the left side of screen.

Audio: the disco era, it’s tough to tell when it’s time for an upgrade.
Visual: Three different sized green softeners on the left side of screen and green blouse on the right side of screen.

Audio: A water softener starts declining with constant use typically after 10 years.
Visual: Three different sized green softeners on the left side of screen and calendar flipping through the years on the right side of screen.

Audio: Let’s look at how you can tell that your system needs an upgrade. The first sign, despite your best efforts to maintain the system,
Visual: Grey slide with number one and the title “Age of Softener”.

Audio: all you get are the spotty dishes, dry itchy skin and stubborn soap scum in your tub at this point.
Visual: Triangle image containing three different icons. Icon of dirty dishes with title “Spotty Dishes,” icon of a sad woman touching her face with the title “dry itchy skin,” an icon of a tub with the title “stubborn soap scum”.

Audio: The system may no longer be regenerating or functioning properly and age may be the culprit.
Visual: Image of a green water softener with cobwebs.

Audio: Another sign is that you have a timer-based water softener.
Visual: Grey slide with number two and the title “Regeneration Style”.

Audio: These regenerate on a schedule you set.
Visual: Image of a green water softener with the water level dropping with an enlarged image of a water softener timer.

Audio: The problem: Your water use can vary, making your regeneration schedule inaccurate.
Visual:  Image of a green water softener with flashing red, low water section with an enlarged image of a water softener timer.

Audio: The latest
Visual:  Image of a green water softener with the water level rising with an enlarged image of water softener timer.

Audio: softeners are demanded initiated and use software and sensors within the system to monitor water usage. This is ideal because it works on an as-needed basis saving energy water and salt use.
Visual: Image of a water softener with rising and lowering water levels.

Audio: The last sign is that your system is bulky and lacks some important features.
Visual: Grey slide with number three and the title “Low-Performance Capabilities”.

Audio: Take a look at your softener style if you have a twin tank system. Your softener is likely taking up extra room a single cabinet.
Visual: Image of a green water softener with arrows pointing to the title “Twin Tank”.

Audio: Style softener is demand initiated and requires less space making it an efficient option for your home.
Visual: Image of white cabinet style water softener.

Audio: And how about those special features? Newer systems include low salt indicators enhanced iron removal and water use monitoring making maintenance and management a breeze if you’ve
Visual: Image of a side by side comparison of the green water softener and the white cabinet style water softener. White water softener is displaying three images on screen. Displaying “no salt,” FE with a line through the letters, and line of alternating size bars.

Audio: decided that it’s time to go out with the old and in with the new.
Visual: Image of white cabinet style water softener.