Water hardness
Phoenix, AZ water hardness
Phoenix's tap water measures 172 to 302 ppm, which is in the hard to very hard range. The number comes from City of Phoenix Water Services's 2025 published data, measured at the tap.
237 ppm
Hard to Very hard
Phoenix shower water
Hardness bands per the U.S. Geological Survey. Range: 172 to 302 ppm across service areas.
Source: City of Phoenix Water Services, 2025.
City of Phoenix Water Services serves different areas from different sources, so hardness depends on where in the service area you are. The range above spans the zones the utility publishes.
Elsewhere in Arizona, Mesa tests at 205 to 376 ppm and Scottsdale at 222 to 325 ppm.
What Phoenix Water Means for Hair and Skin
Above 180 ppm, minerals leave visible scale on fixtures, soap struggles to lather, and hair and skin carry a film that rinsing doesn't remove. This is the range where people notice hard water without being told.
This page is supported by AG Softener. Here is why it is relevant to your water.
AG Softener is a portable shower water softener built for renters.
Real ion-exchange softening (the whole-house technology, sized for a shower) installs in about ten minutes without a plumber, and comes down just as fast when you move.
Check Your Own Zip Code
Check the number for your exact address with the free zip lookup, or read the utility's own report linked above.