Edmonds Water Hardness & Quality Report (2026)
Water Hardness
2.7 grains per gallon
Source
reservoir
pH Level
7.4
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
97.3 mg/L
Est. Daily Cost
$0.12
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 Edmonds, your appliances are currently losing 6% efficiency due to mineral buildup.
| Appliance | In Edmonds | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 8.1 yrs | 8.5 yrs | -5% |
| Washing Machine | 11.9 yrs | 12 yrs | -1% |
| Water Heater | 13.7 yrs | 15 yrs | -9% |
Regional Water Comparison
How Edmonds compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Edmonds, Washington | 46.5 mg/L | 2.3 ppt | 🟢 Soft | reservoir |
| Lynnwood, Washington | 70 mg/L | 3.1 ppt | 🟡 Moderately Hard | reservoir |
| Shoreline, Washington | 15 mg/L | 1.3 ppt | 🟢 Soft | reservoir |
| Mountlake Terrace, Washington | 58.5 mg/L | 2.7 ppt | 🟢 Soft | reservoir |
| Picnic Point-North Lynnwood, Washington | 60 mg/L | 2.7 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How Edmonds compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Edmonds | 46.5 mg/L | 🟢 None |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Edmonds's Water Unique?
Local geology and source profile
Edmonds, Washington, in Snohomish County on the Puget Sound south shore — a major south Snohomish County community known for its vibrant arts scene, exceptional Puget Sound waterfront (the Edmonds–Kingston ferry terminal, one of the most scenic ferry crossings in the Pacific Northwest), world-class scuba diving at the Edmonds Underwater Park (one of the most popular scuba diving sites in the Pacific Northwest), and a diverse Seattle north suburban community — draws its municipal water supply from the Cedar River supply and local groundwater via the City of Edmonds Water Division. Water hardness in Edmonds measures 46.5 mg/L — classified as very soft.
Edmonds' very soft supply reflects the Puget Sound lowland's calcareous-poor glacial and Cascade volcanic geology. The Edmonds water supply draws from the Puget Sound Lowland aquifers (Pleistocene Vashon Till and outwash — calcareous-poor glacial deposits from the Cordilleran Ice Sheet, predominantly non-calcareous quartz and feldspar with minimal carbonate) and Cedar River watershed supply (calcareous-poor Cascade Range volcanic terrain). The Puget Sound lowland's calcareous-poor glacial and Cascade volcanic geology produces the very soft 46.5 mg/L at Edmonds.
With hardness at 46.5 mg/L, Edmonds residents enjoy very soft water with minimal scale challenges. City of Edmonds Water Division consistently delivers water meeting all Washington State DOE and EPA Safe Drinking Water Act requirements.
Geology & Source: Mixed supply from the Olympia Groundwater Basin and Seattle Public Utilities (SPU) Cedar River supply via the City of Edmonds Water Division — the Snohomish County south Puget Sound shoreline northwest Seattle suburb (Quaternary Vashon Till calcareous-poor glacial deposits and Cascade Range calcareous-poor crystalline aquifer recharge); very soft supply at 46.5 mg/L — reflecting the Puget Sound lowland calcareous-poor glacial and Cascade volcanic terrain.