Kingsgate Water Hardness & Quality Report (2026)
Water Hardness
4.6 grains per gallon
Source
reservoir
pH Level
7.8
neutral = 7.0
Lead
0.009 mg/L
✓ Below action level
TDS
211.9 mg/L
Est. Daily Cost
$0.21
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 Kingsgate, your appliances are currently losing 11% efficiency due to mineral buildup.
| Appliance | In Kingsgate | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7 yrs | 8.5 yrs | -18% |
| Washing Machine | 10.7 yrs | 12 yrs | -11% |
| Water Heater | 12.4 yrs | 15 yrs | -17% |
Regional Water Comparison
How Kingsgate compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Kingsgate, Washington | 79.5 mg/L | 3.4 ppt | 🟡 Moderately Hard | reservoir |
| Bothell, Washington | 35 mg/L | 2 ppt | 🟢 Soft | reservoir |
| Inglewood-Finn Hill, Washington | 43 mg/L | 2.2 ppt | 🟢 Soft | reservoir |
| Kirkland, Washington | 80 mg/L | 3.4 ppt | 🟡 Moderately Hard | reservoir |
| Kenmore, Washington | 73.5 mg/L | 3.2 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How Kingsgate compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Kingsgate | 79.5 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
Bring Badger-quality water to your Kingsgate home
Shop water softeners on Amazon.com →
What Makes Kingsgate's Water Unique?
Local geology and source profile
Kingsgate, Washington, in King County — a King County community adjacent to Kirkland and Redmond in the northeast Seattle suburb — receives its water from Seattle Public Utilities, drawing from the Cedar River or Tolt River reservoir (King County) through the northeast Seattle metro distribution.
The moderately soft 79.5 mg/L hardness and TDS of 211.9 mg/L are somewhat higher than the SPU system's typical soft values (Lake Forest Park WA: 21.5 mg/L; Lea Hill WA: 25.5 mg/L) — suggesting Kingsgate receives a blended supply that includes local groundwater with calcareous input from the Puget Sound lowland glacial aquifer, in addition to the soft SPU Cedar-Tolt component. The Kingsgate supply — Oligocene Cascade volcanic (insoluble — SPU component dilutant), Pleistocene Puget Lowland glacial aquifer (slightly calcareous — primary hardness contributor from local groundwater blend), and Quaternary valley alluvium (slightly calcareous — TDS contributor).
At 79.5 mg/L, Kingsgate's water is moderately soft — light scale forms slowly in appliances, dishwashers remain efficient, and no softening is needed. Annual descaling is appropriate. The PFAS level of 3.4 ppt warrants a certified drinking water filter — the King County northeast Seattle metro industrial corridor contribute to Kingsgate's readings.
Geology & Source: Kingsgate in King County draws from the Seattle Public Utilities on Cedar River or Tolt River reservoirs (King County, northeast Seattle suburb, Washington) — the Cedar-Tolt watershed drains the Cascade Range (Oligocene Stevens Ridge Formation — insoluble) and Quaternary Cascade volcanic basalt (insoluble) — Washington King County Cedar-Tolt Cascade insoluble volcanic supply produces moderately soft water at 79.5 mg/L with TDS 211.9 mg/L.