Maltby Water Hardness & Quality Report (2026)
Water Hardness
4.4 grains per gallon
Source
reservoir
pH Level
7.7
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
194.2 mg/L
Est. Daily Cost
$0.20
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 Maltby, your appliances are currently losing 10% efficiency due to mineral buildup.
| Appliance | In Maltby | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.1 yrs | 8.5 yrs | -16% |
| Washing Machine | 10.8 yrs | 12 yrs | -10% |
| Water Heater | 12.6 yrs | 15 yrs | -16% |
Regional Water Comparison
How Maltby compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Maltby, Washington | 75 mg/L | 3.2 ppt | 🟡 Moderately Hard | reservoir |
| North Creek, Washington | 79 mg/L | 3.3 ppt | 🟡 Moderately Hard | reservoir |
| Cottage Lake, Washington | 50 mg/L | 2.4 ppt | 🟢 Soft | reservoir |
| Woodinville, Washington | 41.5 mg/L | 2.2 ppt | 🟢 Soft | reservoir |
| Silver Firs, Washington | 35.5 mg/L | 2 ppt | 🟢 Soft | reservoir |
National Benchmark
How Maltby compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Maltby | 75 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Maltby's Water Unique?
Local geology and source profile
Maltby, Washington, in Snohomish County — a Snohomish County unincorporated community adjacent to Monroe and Bothell in the north Puget Sound lowland — receives its water from Snohomish County PUD or local water associations, drawing from the Pilchuck River watershed through the northwest Washington distribution.
The soft 75 mg/L hardness and TDS of 194.2 mg/L reflect the Snohomish County supply's soft volcanic character — the Eocene Cascade basalt is largely insoluble, while Pleistocene Puget Glacial Drift contributes moderate calcareous mineral content from its calcareous glacially-deposited till (compare Monroe WA: 73/188 in Snohomish County comparable; Bothell WA: 77/200 in King/Snohomish County comparable; Maltby consistent soft from the same Snohomish County Pilchuck River Eocene basalt supply). The Pilchuck watershed — Eocene Cascade basalt (insoluble — primary dilutant), Pleistocene Puget Glacial Drift (slightly calcareous — primary hardness contributor), and Quaternary Pilchuck alluvium (slightly calcareous — minor TDS).
At 75 mg/L with TDS 194, Maltby's water is soft — minimal scale buildup. Annual descaling is appropriate. The PFAS level of 3.2 ppt is low — a clean result for northwest Washington. Review Snohomish County PUD's annual water quality report.
Geology & Source: Maltby in Snohomish County draws from the Snohomish County PUD on the Pilchuck River watershed (Snohomish County, northwest Washington) — the Pilchuck watershed drains Eocene Cascade basalt (insoluble) and Pleistocene Puget Glacial Drift (slightly calcareous) — Washington Snohomish County Pilchuck River Eocene basalt supply produces soft water at 75 mg/L with TDS 194.2 mg/L.