Cedar Mill Water Hardness & Quality Report (2026)
Water Hardness
3.2 grains per gallon
Source
reservoir
pH Level
7.4
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
112.4 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 Cedar Mill, your appliances are currently losing 7% efficiency due to mineral buildup.
| Appliance | In Cedar Mill | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.8 yrs | 8.5 yrs | -8% |
| Washing Machine | 11.6 yrs | 12 yrs | -3% |
| Water Heater | 13.4 yrs | 15 yrs | -11% |
Regional Water Comparison
How Cedar Mill compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Cedar Mill, Oregon | 55 mg/L | 1.9 ppt | 🟢 Soft | reservoir |
| Beaverton, Oregon | 57 mg/L | 1.9 ppt | 🟢 Soft | reservoir |
| Aloha, Oregon | 68.5 mg/L | 2.1 ppt | 🟡 Moderately Hard | reservoir |
| Bethany, Oregon | 71.5 mg/L | 2.2 ppt | 🟡 Moderately Hard | reservoir |
| Tigard, Oregon | 38.5 mg/L | 1.6 ppt | 🟢 Soft | reservoir |
National Benchmark
How Cedar Mill compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Cedar Mill | 55 mg/L | 🟢 None |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Cedar Mill's Water Unique?
Local geology and source profile
Cedar Mill, Oregon, in Washington County — an unincorporated Washington County community adjacent to Beaverton and Hillsboro in the northwest Portland metro — receives its water from the Tualatin Valley Water District (TVWD) or the Joint Water Commission (JWC), drawing from the Tualatin River and Bull Run Watershed (Washington County) through the northwest Portland metro distribution.
The moderately soft 55 mg/L hardness and TDS of 112.4 mg/L reflect the northwest Portland metro TVWD Tualatin River supply's predominantly insoluble volcanic and crystalline character — consistent with other northwest Washington County communities (Beaverton: ~54 mg/L; Hillsboro: ~56 mg/L). The Tualatin River at Washington County drains the Oregon Coast Range — Eocene Umpqua Formation (slightly calcareous — minor hardness contributor), Oligocene Boring Lavas (insoluble basalt — primary supply), and Quaternary alluvial valley (near-insoluble). The insoluble volcanic basalt produces the moderately soft northwest Portland metro supply.
At 55 mg/L, Cedar Mill's water is moderately soft — light scale forms slowly in appliances, dishwashers remain efficient, and bathroom fixtures need occasional cleaning. Semi-annual descaling is appropriate. The PFAS level of 1.9 ppt is very low — the Washington County northwest Oregon rural tech corridor has minimal major adjacent AFFF military PFAS sources, and the modest reading reflects background industrial PFAS from the Portland metro area.
Geology & Source: Cedar Mill in Washington County draws from the Tualatin Valley Water District (TVWD) on the Tualatin River and Joint Water Commission (Washington County, northwest Portland metro) — the Joint Water Commission draws from the Tualatin River (slightly calcareous Eocene Umpqua Formation) and Bull Run Watershed (insoluble Oligocene Boring Lavas) — Oregon Washington County Tualatin-Bull Run watershed produces moderately soft water at 55 mg/L with TDS 112.4 mg/L.