Ahwatukee Foothills Water Hardness & Quality Report (2026)
Water Hardness
10.1 grains per gallon
Source
mixed
pH Level
7.9
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
366.3 mg/L
Est. Daily Cost
$0.46
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 Ahwatukee Foothills, your appliances are currently losing 23% efficiency due to mineral buildup.
| Appliance | In Ahwatukee Foothills | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 3.9 yrs | 8.5 yrs | -54% |
| Washing Machine | 7.2 yrs | 12 yrs | -40% |
| Water Heater | 8.7 yrs | 15 yrs | -42% |
Regional Water Comparison
How Ahwatukee Foothills compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Ahwatukee Foothills, Arizona | 172.5 mg/L | 2.6 ppt | 🟠 Hard | mixed |
| Tempe Junction, Arizona | 421.5 mg/L | 5.6 ppt | 🔴 Very Hard | mixed |
| Tempe, Arizona | 420 mg/L | 5.6 ppt | 🔴 Very Hard | mixed |
| Central City, Arizona | 402 mg/L | 5.4 ppt | 🔴 Very Hard | mixed |
| Phoenix, Arizona | 338 mg/L | 4.6 ppt | 🔴 Very Hard | mixed |
National Benchmark
How Ahwatukee Foothills compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Ahwatukee Foothills | 172.5 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Ahwatukee Foothills's Water Unique?
Local geology and source profile
Ahwatukee Foothills, the southernmost urban village of Phoenix, Arizona — enclosed by South Mountain Park and the Gila River Indian Community — draws its municipal water supply from the City of Phoenix Water Services Department (Ahwatukee Foothills is within Phoenix city limits), sourcing from the Colorado River (via the Central Arizona Project (CAP) Aqueduct) and the Salt River and Verde River watersheds (via the Salt River Project (SRP) reservoir system — Saguaro, Canyon, Roosevelt, Horseshoe, Bartlett, and others in the Maricopa and Gila County mountains). Phoenix blends these sources and distributes citywide. Water hardness in Ahwatukee Foothills measures 172.5 mg/L — classified as hard.
Ahwatukee Foothills' hard supply reflects the combined Phoenix water system's hardness from multiple calcareous Arizona sources. The Colorado River (CAP aqueduct) carries substantial mineral load from the Colorado Plateau calcareous formations (Kaibab Formation, Redwall Limestone, Bright Angel Shale) and evaporite-mineral contributions from the Grand Canyon and Great Basin drainage. The Salt River drains the Mogollon Rim (Precambrian–Mississippian carbonate belt and volcanic rock) and the White Mountain Apache volcanic plateau. The blended Phoenix supply is consistently hard throughout the city, with the south Phoenix–Ahwatukee distribution zone delivering the same moderately hard to hard supply as the rest of Phoenix.
At 172.5 mg/L, Ahwatukee Foothills residents face regular hard water challenges. Scale deposits form on faucet aerators, showerheads, and appliances within weeks — monthly descaling with citric acid solution is standard maintenance. Dishwashers require rinse-aid, and water heaters benefit from annual inspection. City of Phoenix Water Services Department consistently delivers water meeting all Arizona ADEQ and EPA Safe Drinking Water Act requirements.
Geology & Source: Mixed supply from Colorado River (Salt River Project and Phoenix Water Services) and local Salt River and Verde River watershed via the City of Phoenix Water Services Department (Ahwatukee is within Phoenix city limits) — the Colorado River Lower Basin calcareous formations and the Arizona Sonoran Desert evaporite mineral concentration; hard supply at 172.5 mg/L in the south Phoenix–Ahwatukee zone.