Lea Hill Water Hardness & Quality Report (2026)
Water Hardness
1.5 grains per gallon
Source
reservoir
pH Level
7.2
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
43.8 mg/L
Est. Daily Cost
$0.07
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 Lea Hill, your appliances are currently losing 3% efficiency due to mineral buildup.
| Appliance | In Lea Hill | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 8.8 yrs | 8.5 yrs | — |
| Washing Machine | 12.7 yrs | 12 yrs | — |
| Water Heater | 14.6 yrs | 15 yrs | -3% |
Regional Water Comparison
How Lea Hill compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Lea Hill, Washington | 25.5 mg/L | 1.7 ppt | 🟢 Soft | reservoir |
| Auburn, Washington | 54 mg/L | 2.6 ppt | 🟢 Soft | reservoir |
| Covington, Washington | 55 mg/L | 2.6 ppt | 🟢 Soft | reservoir |
| Kent, Washington | 74.5 mg/L | 3.2 ppt | 🟡 Moderately Hard | reservoir |
| East Hill-Meridian, Washington | 50.5 mg/L | 2.4 ppt | 🟢 Soft | reservoir |
National Benchmark
How Lea Hill compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Lea Hill | 25.5 mg/L | 🟢 None |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Lea Hill's Water Unique?
Local geology and source profile
Lea Hill, Washington, in King County — a King County community adjacent to Auburn and Kent in the south Seattle suburb — receives its water from the Tacoma Public Utilities or local Cascade range reservoir (King County) through the south Seattle metro distribution.
The very soft 25.5 mg/L hardness and very low TDS of 35.6 mg/L reflect the south King County supply's very soft character — the Cascade Range watershed's insoluble volcanic and plutonic formations produce near-pure snowmelt runoff, consistent with all King County Cascade reservoir supply communities (compare Lake Forest Park WA: 21.5 mg/L; Snoqualmie WA: 34 mg/L). The Cascade watershed at King County — Oligocene Stevens Ridge Formation (insoluble — primary dilutant), Quaternary Cascade volcanic basalt (insoluble — secondary dilutant), and minor Pleistocene glacial till (slightly calcareous — trace hardness contributor).
At 25.5 mg/L, Lea Hill's water is very soft — no scale buildup, appliances last their full service life, and no softening is needed. Water is ideal for all uses. The PFAS level of 1.7 ppt is very low — no urgent filtration needed, routine monitoring is sufficient.
Geology & Source: Lea Hill in King County draws from the Tacoma Public Utilities or Cascade range reservoir (King County, south Seattle suburb, Washington) — the Cascade watershed at King County drains Oligocene Stevens Ridge Formation (insoluble) and Quaternary Cascade volcanic basalt (insoluble) — Washington King County Cascade reservoir insoluble volcanic supply produces very soft water at 25.5 mg/L with TDS 43.8 mg/L.