Ahwatukee Foothills Water Hardness & Quality Report (2026)
Water Hardness
~120–179 mg/L
Hardestimated · not lab-verified
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
$0.40
energy & soap waste
Source: See methodology section below · 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 20% efficiency due to mineral buildup.
| Appliance | In Ahwatukee Foothills | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.8 yrs | 8.5 yrs | -20% |
| Washing Machine | 9.6 yrs | 12 yrs | -20% |
| Water Heater | 12 yrs | 15 yrs | -20% |
Regional Water Comparison
How Ahwatukee Foothills compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Ahwatukee Foothills, Arizona | ≈ 120–179 mg/L | 2.6 ppt | 🟠 Hard | mixed |
| Tempe Junction, Arizona | ≈ 120–179 mg/L | 902.6 ppt | 🟠 Hard | reservoir |
| Tempe, Arizona | ≈ 120–179 mg/L | 902.6 ppt | 🟠 Hard | reservoir |
| Central City, Arizona | ≈ 120–179 mg/L | 5.4 ppt | 🟠 Hard | mixed |
| Phoenix, Arizona | ≈ 180+ mg/L | 0 ppt | 🔴 Very Hard | reservoir |
National Benchmark
How Ahwatukee Foothills compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Ahwatukee Foothills | ≈ 120–179 mg/L | 🟠 Moderate |
| USA National Avg | 151 mg/L | 🟠 Moderate |
| Scarsdale Top Rated | 0.02 mg/L | 🟢 None |
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What Makes Ahwatukee Foothills's Water Unique?
Local geology and source profile
Ahwatukee Foothills, located in south Phoenix, Arizona, is served by Phoenix Water Services, which manages the municipal water supply for this community in Maricopa County. The primary source is surface water from Canal A, originating from the Colorado River. A secondary groundwater system is maintained for emergencies and supply interruptions. Water is treated at the Foothills Water Treatment Plant before distribution to residents, using a multi-stage process including screening, chemical coagulation, filtration through anthracite coal, coarse sand, and fine garnet layers, plus chlorine disinfection and activated carbon for odor control.
The Colorado River system flows through the Sonoran Desert, and the underlying regional geology consists of Quaternary alluvial deposits overlying Precambrian crystalline basement rocks. As the Colorado River travels through Arizona's desert landscape, it contacts mineral-rich soils and rock formations containing calcium and magnesium from limestone and dolomite. This natural geological process, combined with the arid climate, results in a moderately hard water supply characteristic of the Phoenix metropolitan area.
Moderately hard water in Ahwatukee Foothills may cause mineral scaling on plumbing fixtures, faucets, and showerheads over time. Water heaters, dishwashers, and washing machines may accumulate scale deposits, reducing efficiency. A water softener is recommended to mitigate mineral buildup and extend the lifespan of plumbing and appliances; regular descaling of fixtures helps manage accumulation. Phoenix Water Services treats water to meet all federal and state drinking water regulations, and residents should consult water quality reports for specific pH, lead/copper compliance, and contaminant information.
Geology & Source: Colorado River via Canal A; Quaternary alluvial deposits overlying Precambrian crystalline basement rocks — limestone and dolomite formations along desert terrain dissolve calcium and magnesium, producing moderately hard supply typical of central
Other Arizona Water Reports
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Frequently Asked Questions
Is Ahwatukee Foothills's water safe to drink?
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How does Ahwatukee Foothills compare to the USA average?
Data Sources & Methodology
Water quality data for Ahwatukee Foothills is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.
Water Hardness
Modelled estimate based on state-level USGS geological survey data for this region. No direct USGS Water Quality Portal measurement was matched to this city — the value reflects a statistical range calibrated to the state's dominant rock types and typical source water characteristics.
pH
Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.
TDS — Total Dissolved Solids
Estimated using a derived ratio from water hardness and regional conductance profiles. TDS in natural water correlates strongly with total mineral content including hardness ions.
PFAS — Perfluoroalkyl and Polyfluoroalkyl Substances
EPA UCMR5 (5th Unregulated Contaminant Monitoring Rule, 2023–2025) — sum of PFAS compounds detected at the public water system serving this city. A value of 0 indicates the system was sampled with no detection above reporting limits.
Lead
Modelled estimate based on the EPA Lead and Copper Rule 90th-percentile tap-sample methodology. No publicly available per-city lead dataset with sufficient national coverage exists. Values are a conservative baseline derived from city population tier and infrastructure age — all estimates are maintained below the EPA action level of 0.015 mg/L.
Appliance Lifespan
Calculated from water hardness using a linear degradation model. Baseline lifespans represent soft-water performance (kettle: 8.5 yrs, washing machine: 12.0 yrs, water heater: 15.0 yrs). Hard water mineral scale progressively reduces operational life in direct proportion to hardness concentration.