Glendale Water Hardness & Quality Report (2026)
Water Hardness
21.4 grains per gallon
Source
mixed
pH Level
8.5
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
1045 mg/L
Est. Daily Cost
$0.98
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 Glendale, your appliances are currently losing 45% efficiency due to mineral buildup.
| Appliance | In Glendale | 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 Glendale compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Glendale, Arizona | 366.5 mg/L | 5 ppt | 🔴 Very Hard | mixed |
| Maryvale, Arizona | 392 mg/L | 5.3 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 |
| Sun City, Arizona | 314 mg/L | 4.3 ppt | 🔴 Very Hard | mixed |
National Benchmark
How Glendale compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Glendale | 366.5 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Glendale's Water Unique?
Local geology and source profile
Glendale's water is supplied by the City of Glendale Water Services Division, blending imported surface water from Salt River Project (SRP) deliveries and Central Arizona Project (CAP) Colorado River water with West Valley groundwater backup. SRP delivers water from the Salt and Verde river reservoirs — Roosevelt Lake, Saguaro Lake, Bartlett Lake — via the SRP canal system to Glendale's treatment and distribution network. CAP water arrives from Lake Havasu on the Colorado River via the CAP Aqueduct running through the West Valley corridor. Glendale manages underground water storage banking in the West Valley Aquifer as part of Arizona's groundwater sustainability framework, recharging treated CAP water during surplus availability for future drought-year recovery pumping. Glendale also serves as the location of the SRP's Deer Valley Water Treatment Plant.
Glendale's very hard water at 366.5 mg/L is characteristic of the western Phoenix metro supply chemistry. The SRP Salt River reservoir fraction acquires carbonate hardness from the Precambrian Mazatzal Group and Cretaceous Bisbee Formation of the Salt River canyon watershed. The dominant CAP Colorado River fraction carries the high carbonate loading from the Permian Kaibab Limestone and Paleozoic Grand Canyon carbonate sequence — producing extremely hard water. The West Valley alluvial aquifer groundwater, formed from calcareous Quaternary valley fill, adds further hardness. The blended result is among the highest hardness levels of any major US city.
Glendale residents experience the severe hard-water conditions universal across the Phoenix metropolitan area. Thick mineral scale forms rapidly on shower enclosures, fixtures, and inside appliances. Dishwashers require maximum-concentration rinse-aid and dedicated hard-water detergent. Water heaters develop scale-related efficiency loss quickly. A whole-house water softener is the near-universal household installation in Glendale, and the city's predominantly post-1980 residential construction typically includes dedicated softener plumbing space and a pre-treatment loop. Monthly descaling of outdoor fixtures and irrigation heads and annual water heater servicing are essential at this extreme hardness level.
Geology & Source: Salt River Project reservoir water and Central Arizona Project Colorado River imports over Permian Kaibab Limestone; West Valley alluvial basin — very hard blended Phoenix metro supply