Green Valley Water Hardness & Quality Report (2026)
Water Hardness
8.6 grains per gallon
Source
mixed
pH Level
7.8
neutral = 7.0
Lead
0.001 mg/L
✓ Below action level
TDS
300.6 mg/L
Est. Daily Cost
$0.39
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 Green Valley, your appliances are currently losing 20% efficiency due to mineral buildup.
| Appliance | In Green Valley | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.7 yrs | 8.5 yrs | -45% |
| Washing Machine | 8.1 yrs | 12 yrs | -33% |
| Water Heater | 9.7 yrs | 15 yrs | -35% |
Regional Water Comparison
How Green Valley compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Green Valley, Arizona | 148 mg/L | 2.3 ppt | 🟠 Hard | mixed |
| Sahuarita, Arizona | 180 mg/L | 2.7 ppt | 🔴 Very Hard | mixed |
| Drexel Heights, Arizona | 339 mg/L | 4.6 ppt | 🔴 Very Hard | mixed |
| Tucson, Arizona | 255.5 mg/L | 3.6 ppt | 🔴 Very Hard | mixed |
| Rio Rico, Arizona | 362.5 mg/L | 4.9 ppt | 🔴 Very Hard | mixed |
National Benchmark
How Green Valley compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Green Valley | 148 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Green Valley's Water Unique?
Local geology and source profile
Green Valley, Arizona, in Pima County — a large unincorporated retirement community in the southern Pima County Santa Cruz River Valley, 25 miles south of Tucson near the Santa Rita Mountains, one of Arizona's largest and most established planned retirement communities — receives its municipal water from Arizona Water Company or the Continental Ranch Utilities in the Green Valley district, which draws from the Santa Cruz River alluvial aquifer and local Pima County groundwater production wells in the southern Tucson basin and Green Valley sub-basin.
The moderately hard 148 mg/L hardness and TDS of 300.6 mg/L are considerably softer than many Arizona desert communities (Anthem 374.5 mg/L, Gilbert ~230 mg/L), reflecting Green Valley's supply from the Santa Cruz River alluvial aquifer recharged by mountain front inflow from the Santa Rita Mountains. The Santa Rita Mountains — underlain by Precambrian Pinal Schist, Paleozoic limestone and dolomite (the Permian Epitaph Dolomite, Bisbee Group), and Cretaceous granodiorite — provide moderate-carbonate recharge to the Santa Cruz basin alluvial aquifer. The combination of crystalline granodiorite (soft) and Paleozoic carbonate (harder) recharge from the mountain front produces moderately hard alluvial groundwater, considerably less mineralized than the CAP Colorado River supply.
At 148 mg/L, Green Valley's water is moderately hard for an Arizona desert retirement community. Scale builds in kettles and appliances over months, the dishwasher benefits from rinse aid, and bathroom fixtures develop calcium deposits. Quarterly descaling of heating appliances is appropriate. The PFAS level of 2.3 ppt is excellent — among the lowest in Arizona and reflecting Green Valley's limited industrial and military PFAS sources; the retirement community's residential character and the remote Santa Cruz Valley corridor's minimal aviation-industrial activity contribute to this favorable reading.
Geology & Source: Green Valley in Pima County is served by Arizona Water Company drawing from the Santa Cruz River alluvial aquifer — the alluvial aquifer taps Quaternary alluvial fan deposits recharged by the Santa Rita Mountains (Precambrian schist and Paleozoic carbonate) — mountain-front carbonate recharge produces moderately hard water at 148 mg/L with TDS 301 mg/L in this southern Arizona retirement community.