Deer Valley Water Hardness & Quality Report (2026)
Water Hardness
14 grains per gallon
Source
mixed
pH Level
8.4
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
571.9 mg/L
Est. Daily Cost
$0.64
energy & soap waste
Source: USGS Water Quality Portal · Updated 2026
0–60
mg/L
Soft
61–120
mg/L
Moderately Hard
121–180
mg/L
Hard
180+
mg/L
Very Hard
Appliance Damage Report
In Deer Valley, your appliances are currently losing 32% efficiency due to mineral buildup.
| Appliance | In Deer Valley | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.7 yrs | 8.5 yrs | -80% |
| Washing Machine | 4.7 yrs | 12 yrs | -61% |
| Water Heater | 6 yrs | 15 yrs | -60% |
Regional Water Comparison
How Deer Valley compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Deer Valley, Arizona | 240.5 mg/L | 3.5 ppt | 🔴 Very Hard | mixed |
| Peoria, Arizona | 316 mg/L | 4.4 ppt | 🔴 Very Hard | mixed |
| Glendale, Arizona | 366.5 mg/L | 5 ppt | 🔴 Very Hard | mixed |
| Sun City, Arizona | 314 mg/L | 4.3 ppt | 🔴 Very Hard | mixed |
| Anthem, Arizona | 374.5 mg/L | 5.1 ppt | 🔴 Very Hard | mixed |
National Benchmark
How Deer Valley compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Deer Valley | 240.5 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Deer Valley's Water Unique?
Local geology and source profile
Deer Valley, a large community in northwestern Phoenix, Arizona, receives its municipal water supply from the City of Phoenix Water Services Department, which serves the entire Phoenix metropolitan area from a blended regional supply. Phoenix draws from three primary source blends: surface water from Salt River Project (SRP) canals connected to Roosevelt, Apache, Canyon, and Bartlett Reservoirs on the Salt and Verde Rivers; imported Colorado River water via the Central Arizona Project (CAP) Aqueduct from Lake Havasu; and groundwater pumped from the Phoenix Active Management Area alluvial aquifer beneath the Salt River Valley in Maricopa County. Water hardness in Deer Valley measures 240.5 mg/L — classified as very hard, and lower than some east Phoenix locations due to the proximity of the Deer Valley Water Treatment Plant and its treatment processes.
Deer Valley's very hard water reflects the same geological drivers affecting the greater Phoenix Basin. CAP Colorado River imports arrive mineralised from extensive transit through Permian Kaibab Limestone and Triassic carbonate formation canyons along the Colorado River corridor. Salt River Project reservoirs collect calcium-rich runoff from the Tonto and Mazatzal Mountain terrains. Phoenix Basin groundwater — ancient Quaternary and Tertiary alluvial deposits in the arid Sonoran Desert basin — contains concentrated dissolved minerals from long residence times and high evapotranspiration.
At 240.5 mg/L, Deer Valley residents encounter significant limescale challenges. White calcium deposits build up rapidly on showerheads, faucet aerators, tile grout, and glass surfaces — routine cleaning with acid-based descaling products is standard household practice. Water heaters experience accelerated scale build-up on heating elements, and a whole-house water softener is the standard recommendation from Phoenix area plumbers for protecting appliances and plumbing infrastructure. Phoenix Water Services consistently delivers EPA-compliant, safe water throughout the Deer Valley distribution area.
Geology & Source: Mixed supply from Salt River Project canal water (Roosevelt Lake and Verde River reservoirs) and Central Arizona Project (CAP) Colorado River aqueduct imports, blended with Phoenix Active Management Area groundwater — Sonoran Desert basin-fill sediments and Permian–Triassic carbonate canyon geology in the source drainages produce very hard supply at 240.5 mg/L.