Somerton 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 Somerton, your appliances are currently losing 23% efficiency due to mineral buildup.
| Appliance | In Somerton | 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 Somerton compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Somerton, Arizona | 172.5 mg/L | 2.6 ppt | 🟠 Hard | mixed |
| San Luis, Arizona | 226 mg/L | 3.3 ppt | 🔴 Very Hard | mixed |
| Yuma, Arizona | 399.5 mg/L | 5.4 ppt | 🔴 Very Hard | mixed |
| Fortuna Foothills, Arizona | 262 mg/L | 3.7 ppt | 🔴 Very Hard | mixed |
| Calexico, California | 189.5 mg/L | 7.3 ppt | 🔴 Very Hard | mixed |
National Benchmark
How Somerton compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Somerton | 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 Somerton's Water Unique?
Local geology and source profile
Somerton, Arizona, in Yuma County — a Yuma County city adjacent to Yuma and San Luis (Arizona-Mexico border) on the Colorado River in southwest Arizona — receives its water from the Somerton Water Division or local utilities, drawing from the Colorado River (Yuma County) and local Yuma Basin groundwater through the southwest Arizona distribution.
The hard 172.5 mg/L hardness and TDS of 366.3 mg/L reflect the southwest Arizona Colorado River Yuma Basin supply's hard evaporitic character — somewhat softer than the eastern Arizona communities (Show Low: ~215 mg/L) due to the diluted lower Colorado River. The Colorado River at Yuma County carries dissolved minerals from upstream Colorado Plateau formations — Permian Kaibab Limestone (calcareous — primary hardness contributor at the Grand Canyon headwaters), Permian Supai Group (slightly calcareous-evaporitic), and Triassic Chinle Formation (slightly calcareous) — with additional local Yuma Basin alluvial concentration (slightly calcareous-evaporitic).
At 172.5 mg/L, Somerton's water is hard — scale builds steadily in kettles and appliances, dishwashers benefit from rinse aid, and water heaters should be descaled annually. Monthly descaling is recommended. The PFAS level of 2.6 ppt is very low — the Yuma County southwest Arizona border region has limited major AFFF military PFAS sources adjacent to the Colorado River service zone, and the Colorado River PFAS dilution at this point produces the low readings.
Geology & Source: Somerton in Yuma County draws from the Somerton Water Division on the Colorado River and local Yuma Basin groundwater (Yuma County, southwest Arizona) — the Colorado River at Yuma carries dissolved minerals from Permian Kaibab Limestone (calcareous) and Triassic evaporitic Colorado Plateau — Arizona Yuma County Colorado River calcareous-evaporitic supply produces hard water at 172.5 mg/L with TDS 366.3 mg/L.