Sedro-Woolley Water Hardness & Quality Report (2026)
Water Hardness
4.3 grains per gallon
Source
reservoir
pH Level
7.7
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
186.5 mg/L
Est. Daily Cost
$0.19
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 Sedro-Woolley, your appliances are currently losing 10% efficiency due to mineral buildup.
| Appliance | In Sedro-Woolley | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.2 yrs | 8.5 yrs | -15% |
| Washing Machine | 10.9 yrs | 12 yrs | -9% |
| Water Heater | 12.7 yrs | 15 yrs | -15% |
Regional Water Comparison
How Sedro-Woolley compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Sedro-Woolley, Washington | 73 mg/L | 3.2 ppt | 🟡 Moderately Hard | reservoir |
| Mount Vernon, Washington | 57 mg/L | 2.6 ppt | 🟢 Soft | reservoir |
| Arlington, Washington | 51.5 mg/L | 2.5 ppt | 🟢 Soft | reservoir |
| Bellingham, Washington | 79 mg/L | 3.3 ppt | 🟡 Moderately Hard | reservoir |
| Anacortes, Washington | 46 mg/L | 2.3 ppt | 🟢 Soft | reservoir |
National Benchmark
How Sedro-Woolley compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Sedro-Woolley | 73 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
Bring Badger-quality water to your Sedro-Woolley home
Shop water softeners on Amazon.com →
What Makes Sedro-Woolley's Water Unique?
Local geology and source profile
Sedro-Woolley, Washington, in Skagit County — a Skagit County city adjacent to Burlington and Mount Vernon on the Skagit River in northwest Washington — receives its water from the City of Sedro-Woolley Water Department, drawing from the Skagit River through the northwest Washington distribution.
The soft 73 mg/L hardness and TDS of 186.5 mg/L reflect the Skagit County supply's soft volcanic character — the Mesozoic Cascade Crystalline Core is largely insoluble metamorphic and intrusive rock, while Pleistocene Skagit Valley glacial drift contributes moderate calcareous mineral content from its glacially-deposited till (compare Burlington WA: 70/179 in Skagit County comparable; Mount Vernon WA: 75/193 in Skagit County comparable; Sedro-Woolley consistent soft from the same Skagit County Skagit River Mesozoic crystalline insoluble supply). The Skagit watershed — Mesozoic Cascade Crystalline Core (insoluble — primary dilutant), Pleistocene Skagit Valley glacial drift (slightly calcareous — primary hardness contributor), and Quaternary Skagit alluvium (slightly calcareous — minor TDS).
At 73 mg/L with TDS 187, Sedro-Woolley'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 the City of Sedro-Woolley's annual water quality report.
Geology & Source: Sedro-Woolley in Skagit County draws from the Sedro-Woolley Water on the Skagit River (Skagit County, northwest Washington) — the Skagit watershed drains Mesozoic Cascade Crystalline Core (insoluble) and Pleistocene Skagit Valley glacial drift (slightly calcareous) — Washington Skagit County Skagit River Mesozoic crystalline insoluble supply produces soft water at 73 mg/L with TDS 186.5 mg/L.