Maryvale Water Hardness & Quality Report (2026)
Water Hardness
22.9 grains per gallon
Source
mixed
pH Level
8.5
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
1154.8 mg/L
Est. Daily Cost
$1.00
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 Maryvale, your appliances are currently losing 45% efficiency due to mineral buildup.
| Appliance | In Maryvale | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.5 yrs | 8.5 yrs | -82% |
| Washing Machine | 3 yrs | 12 yrs | -75% |
| Water Heater | 5 yrs | 15 yrs | -67% |
Regional Water Comparison
How Maryvale compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Maryvale, Arizona | 392 mg/L | 5.3 ppt | 🔴 Very Hard | mixed |
| Glendale, Arizona | 366.5 mg/L | 5 ppt | 🔴 Very Hard | mixed |
| Alhambra, Arizona | 328 mg/L | 4.5 ppt | 🔴 Very Hard | mixed |
| Peoria, Arizona | 316 mg/L | 4.4 ppt | 🔴 Very Hard | mixed |
| Encanto, Arizona | 401 mg/L | 5.4 ppt | 🔴 Very Hard | mixed |
National Benchmark
How Maryvale compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Maryvale | 392 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Maryvale's Water Unique?
Local geology and source profile
Maryvale, a densely populated neighbourhood of Phoenix, Arizona, receives its municipal water through the City of Phoenix Water Services Department, sourcing from the same regional blend that serves greater Phoenix: surface water from Roosevelt Lake and Bartlett/Horseshoe Reservoirs via the Salt River Project canal system, imported Colorado River water pumped via the Central Arizona Project (CAP) Aqueduct, and groundwater pumped from the Phoenix Active Management Area alluvial aquifer beneath Maricopa County. Water is treated at Phoenix's Val Vista, Deer Valley, and Union Hills treatment plants. Maryvale's water hardness reaches 392 mg/L — extremely hard and among the highest values recorded for any major US residential neighbourhood.
Maryvale's extreme hardness is a consequence of the desert geology and supply origins of greater Phoenix. Colorado River water travels through hundreds of miles of Permian Kaibab Limestone, Triassic Moenkopi Formation, and Jurassic canyon carbonate geology before reaching Lake Havasu, arriving already heavily mineralised. Salt River impoundments add hardness from the Sonoran Desert's calcium-rich terrain, and the Phoenix Basin alluvial aquifer — composed of ancient Colorado River and Basin and Range sediments — contributes further dissolved minerals. The semi-arid climate's high evaporation rate concentrates minerals in stored water, compounding the natural geological hardness.
At 392 mg/L, Maryvale homeowners face extreme scale challenges. Showerheads can block within weeks, and tile, glass, and chrome surfaces accumulate thick white calcium deposits that require regular acid treatment to remove. Water heaters experience rapid element failure without annual descaling — a whole-house water softener is nearly essential for protecting appliances and extending their operational life. Pool and evaporative cooler maintenance also requires diligent attention to mineral saturation. Despite these challenges, Phoenix Water consistently delivers EPA-compliant, safe drinking water throughout Maryvale and the broader Phoenix service area.
Geology & Source: Mixed supply from the Salt River Project canals (Roosevelt and Verde River impoundments) and Central Arizona Project (CAP) Colorado River water, blended with Phoenix Active Management Area groundwater — desert carbonate canyon geology and ancient lake sediment dissolution produce extremely hard supply at 392 mg/L, one of the highest in the nation.