Enumclaw Water Hardness & Quality Report (2026)
Water Hardness
3.4 grains per gallon
Source
reservoir
pH Level
7.5
neutral = 7.0
Lead
0.006 mg/L
✓ Below action level
TDS
130.9 mg/L
Est. Daily Cost
$0.15
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 Enumclaw, your appliances are currently losing 8% efficiency due to mineral buildup.
| Appliance | In Enumclaw | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.7 yrs | 8.5 yrs | -9% |
| Washing Machine | 11.5 yrs | 12 yrs | -4% |
| Water Heater | 13.3 yrs | 15 yrs | -11% |
Regional Water Comparison
How Enumclaw compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Enumclaw, Washington | 57.5 mg/L | 2.7 ppt | 🟢 Soft | reservoir |
| Lake Morton-Berrydale, Washington | 46.5 mg/L | 2.3 ppt | 🟢 Soft | reservoir |
| Prairie Ridge, Washington | 74.5 mg/L | 3.2 ppt | 🟡 Moderately Hard | reservoir |
| Maple Valley, Washington | 78 mg/L | 3.3 ppt | 🟡 Moderately Hard | reservoir |
| Bonney Lake, Washington | 33.5 mg/L | 1.9 ppt | 🟢 Soft | reservoir |
National Benchmark
How Enumclaw compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Enumclaw | 57.5 mg/L | 🟢 None |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Enumclaw's Water Unique?
Local geology and source profile
Enumclaw, Washington, in King County — a King County city adjacent to Black Diamond and Auburn at the foot of the Cascade Range in southeast Washington — receives its water from the City of Enumclaw Water Department, drawing from the White River fed by Mount Rainier glacial melt through the southeast Washington distribution.
The soft 57.5 mg/L hardness and TDS of 130.9 mg/L reflect the King County White River supply's soft volcanic character — the Quaternary Mount Rainier volcanic deposits (andesite, tephra) and Cascade Range basalt are both highly insoluble formations, with the glacial meltwater contributing pristine, mineral-poor snowmelt (compare Black Diamond WA: 55/125 in King County comparable; Auburn WA: 60/135 in King County comparable; Enumclaw consistent soft from the same King County White River Mount Rainier volcanic supply). The White River at Enumclaw — Quaternary Mount Rainier volcanic deposits (insoluble — primary dilutant), Quaternary Cascade basalt (insoluble — secondary dilutant), and Holocene Cascade alluvium (insoluble — minimal TDS).
At 57.5 mg/L with TDS 131, Enumclaw's water is soft — minimal scale buildup. Annual descaling is appropriate. The PFAS level of 2.7 ppt is low — a clean result for the Cascade foothills. Review the City of Enumclaw's annual water quality report for the latest monitoring data.
Geology & Source: Enumclaw in King County draws from the City of Enumclaw Water on the White River (King County, southeast Washington) — the White River at Enumclaw drains Quaternary Mount Rainier volcanic deposits (insoluble) and Quaternary Cascade Range basalt (insoluble) — Washington King County White River Mount Rainier volcanic supply produces soft water at 57.5 mg/L with TDS 130.9 mg/L.