Water Hardness in Arizona

15 counties — Average 246.9 PPM (Very Hard)

5
10
Soft (0.0%) Moderate (0.0%) Hard (33.3%) Very Hard (66.7%)

Arizona Water Hardness Map

Soft   Moderate   Hard   Very Hard

Hardest Water Counties

Coconino300 PPM
Gila250 PPM
Graham206 PPM
La Paz340 PPM
Maricopa360 PPM
Mohave340 PPM
Pinal260 PPM
Santa Cruz209.5 PPM
Yavapai224 PPM
Yuma480 PPM
Arizona

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All 15 Counties — By Water Hardness

CountyClassificationHardness
Apache Hard 150 PPM
Cochise Hard 161 PPM
Coconino Very Hard 300 PPM
Gila Very Hard 250 PPM
Graham Very Hard 206 PPM
Greenlee Hard 160 PPM
La Paz Very Hard 340 PPM
Maricopa Very Hard 360 PPM
Mohave Very Hard 340 PPM
Navajo Hard 128 PPM
Pima Hard 135 PPM
Pinal Very Hard 260 PPM
Santa Cruz Very Hard 209.5 PPM
Yavapai Very Hard 224 PPM
Yuma Very Hard 480 PPM

Source: USGS Water Quality Portal

Frequently Asked Questions

How hard is the water in Arizona?

Arizona has an average water hardness of 246.9 PPM, classified as very hard. Out of 15 counties, 0 have soft water, 0 moderately hard, 5 hard, and 10 very hard.

Which Arizona counties have the hardest water?

Arizona has 10 counties with very hard water (above 180 mg/L). See the county table above for a complete breakdown by hardness level.

How do I check water hardness for my Arizona address?

Enter your ZIP code in the search box above to see your area's estimated water hardness, classification, and water utility information.