State distribution
Hardness across indexed ZIPs
Counts describe published ZIP profiles, not a population-weighted statewide sample.
Soft · 0–60 PPM95
Moderately hard · 61–120 PPM28
Hard · 121–180 PPM10
Very hard · 181+ PPM80
State water index
Arizona water hardness
Search 133 indexed communities and 285 ZIP profiles, then compare the underlying utility, source, distance, and reporting context.
Median regional evidence
64PPM
Moderately Hard
Indexed range 33–2680 PPM
- ZIP profiles
- 285
- Cities
- 133
- Matched utilities
- 434
- Counties
- 15
Understanding Arizona
Why local comparisons matter here
Arizona crosses the Colorado Plateau, central highlands, and Basin and Range deserts. Communities may use Colorado River water, reservoirs, deep basin groundwater, or changing blends.
In this index, soft is the largest category, covering 95 of 213 profiles with hardness data. The state median is 64 PPM, but the full indexed range is 33–2680 PPM.
Evidence coverage
What the current records support
- Hardness estimate
- 75%
- Lead 90th percentile
- 100%
- Copper 90th percentile
- 5%
106
Low-confidence hardness profiles
85
Research-comparison eligible profiles
Reported source water
Utility source mix
- Groundwater
- 396
- Surface water
- 38
Highest medians
Highest eligible city medians
- 1. Buckeye481 PPM
- 2. Avondale64 PPM
- 3. Surprise58 PPM
- 4. Glendale55 PPM
- 5. Peoria55 PPM
Lowest medians
Lowest eligible city medians
- 1. Phoenix54 PPM
- 2. Scottsdale55 PPM
- 3. Peoria55 PPM
- 4. Glendale55 PPM
- 5. Surprise58 PPM
City directory
Explore Arizona by city
Search by city or county, then sort by name, hardness, or ZIP coverage.
133 cities · 285 ZIP profiles
133 cities found
Page 1 of 6
Aguila
Maricopa County · 1 ZIP
—
No regional sample1 active record
Ajo
Pima County · 1 ZIP
—
No regional sampleNo active flag
Alpine
Apache County · 1 ZIP
55PPM regional
Single regional valueNo active flag
Apache Junction
Pinal County · 2 ZIPs
866PPM regional
Single regional value1 active record
Arivaca
Pima County · 1 ZIP
—
No regional sampleNo active flag
Avondale
Maricopa County · 3 ZIPs
64PPM regional
Single regional valueNo active flag
Bagdad
Yavapai County · 1 ZIP
—
No regional sampleNo active flag
Bellemont
Coconino County · 1 ZIP
263PPM regional
Single regional valueNo active flag
Benson
Cochise County · 2 ZIPs
—
No regional sample1 active record
Bisbee
Cochise County · 1 ZIP
245PPM regional
Single regional value1 active record
Bouse
La Paz County · 1 ZIP
—
No regional sampleNo active flag
Bowie
Cochise County · 1 ZIP
—
No regional sampleNo active flag
Buckeye
Maricopa County · 5 ZIPs
481PPM regional
Regional range 239.5–26802 active records
Cameron
Coconino County · 1 ZIP
128PPM regional
Single regional valueNo active flag
Camp Verde
Yavapai County · 1 ZIP
245PPM regional
Single regional value3 active records
Carefree
Maricopa County · 1 ZIP
68PPM regional
Single regional valueNo active flag
Casa Grande
Pinal County · 3 ZIPs
—
No regional sampleNo active flag
Cave Creek
Maricopa County · 1 ZIP
88PPM regional
Single regional valueNo active flag
Chandler
Maricopa County · 6 ZIPs
56PPM regional
Regional range 48.5–56No active flag
Chino Valley
Yavapai County · 1 ZIP
245PPM regional
Single regional value2 active records
Chloride
Mohave County · 1 ZIP
—
No regional sampleNo active flag
Cibola
La Paz County · 1 ZIP
285PPM regional
Single regional valueNo active flag
Clarkdale
Yavapai County · 1 ZIP
248PPM regional
Single regional valueNo active flag
Clay Springs
Navajo County · 1 ZIP
183PPM regional
Single regional valueNo active flag
County comparison
Highest regional-evidence county medians
| County | Median | Range | ZIP profiles |
|---|---|---|---|
| Yuma County | 491 PPM | 300–699 | 7 |
| Mohave County | 306 PPM | 302–638 | 10 |
| La Paz County | 288 PPM | 285–330 | 6 |
| Coconino County | 263 PPM | 128.2–389 | 12 |
| Yavapai County | 246 PPM | 33–254.5 | 20 |
| Cochise County | 245 PPM | 107–245 | 15 |
| Pinal County | 210 PPM | 209.5–866 | 21 |
| Pima County | 210 PPM | 50–209.5 | 35 |
| Navajo County | 183 PPM | 105–183 | 8 |
| Apache County | 69 PPM | 55.4–217 | 8 |
| Maricopa County | 56 PPM | 39–2680 | 127 |
| Gila County | — PPM | —–— | 5 |