Central City Water Hardness & Quality Report (2026)
Water Hardness
23.5 grains per gallon
Source
mixed
pH Level
8.5
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
1199.8 mg/L
Est. Daily Cost
$1.00
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 Central City, your appliances are currently losing 45% efficiency due to mineral buildup.
| Appliance | In Central City | 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 Central City compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Central City, Arizona | 402 mg/L | 5.4 ppt | 🔴 Very Hard | mixed |
| Phoenix, Arizona | 338 mg/L | 4.6 ppt | 🔴 Very Hard | mixed |
| Encanto, Arizona | 401 mg/L | 5.4 ppt | 🔴 Very Hard | mixed |
| Alhambra, Arizona | 328 mg/L | 4.5 ppt | 🔴 Very Hard | mixed |
| Tempe Junction, Arizona | 421.5 mg/L | 5.6 ppt | 🔴 Very Hard | mixed |
National Benchmark
How Central City compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Central City | 402 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Central City's Water Unique?
Local geology and source profile
Central City, Arizona, a neighborhood and Census Designated Place in central Phoenix, Maricopa County — the urban core area of Phoenix including downtown Phoenix, the Arizona State Capitol, and the central Phoenix arts and business district — draws its municipal water supply from the Colorado River (Central Arizona Project aqueduct) and Salt River Project (SRP) Roosevelt Lake and local Salt River Valley Groundwater Basin via the City of Phoenix Water Services Department. Water hardness in Central City–Phoenix measures 402 mg/L — classified as extremely hard.
Central City Phoenix's extreme hardness reflects the Colorado River–CAP supply's high mineral content combined with the Salt River Valley calcareous alluvial aquifer. The Central Arizona Project (CAP) aqueduct delivers Colorado River water from Lake Havasu (Parker, Arizona) — where the Colorado River carries the accumulated calcareous dissolution of the Colorado Plateau (Kaibab Limestone, Redwall Limestone, Permian Coconino Sandstone calcareous cementation, and evaporite formations — the Grand Canyon and plateau carbonate sequence producing extremely hard water, raw hardness 300–600 mg/L). The Salt River Project Roosevelt Lake water similarly carries calcareous input from the Arizona Transition Zone limestone and Central Arizona Highlands calcareous terrain. Phoenix's water treatment does not fully soften the supply, and the CAP-dominant blend produces the characteristic extreme Phoenix metropolitan hardness.
At 402 mg/L, Central City Phoenix residents face severe hard water challenges. Scale forms within hours on all surfaces. Daily descaling of fixtures is necessary. Water heaters fail within 1–2 years without professional descaling. City of Phoenix Water Services consistently delivers water meeting all Arizona ADEQ and EPA Safe Drinking Water Act requirements, but home water softeners are strongly advisable.
Geology & Source: Mixed supply from the Colorado River (Central Arizona Project aqueduct) and local Salt River Valley groundwater via the City of Phoenix Water Services — the central Phoenix Salt River Valley alluvial plain and CAP Colorado River delivery; extremely hard supply at 402 mg/L — reflecting the Colorado River's high dissolved mineral content at the CAP intake and the Salt River Valley calcareous alluvial aquifer.