Tualatin Water Hardness & Quality Report (2026)
Water Hardness
3.9 grains per gallon
Source
reservoir
pH Level
7.5
neutral = 7.0
Lead
0.006 mg/L
✓ Below action level
TDS
146.6 mg/L
Est. Daily Cost
$0.18
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 Tualatin, your appliances are currently losing 9% efficiency due to mineral buildup.
| Appliance | In Tualatin | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.4 yrs | 8.5 yrs | -13% |
| Washing Machine | 11.1 yrs | 12 yrs | -8% |
| Water Heater | 12.9 yrs | 15 yrs | -14% |
Regional Water Comparison
How Tualatin compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Tualatin, Oregon | 67 mg/L | 2.1 ppt | 🟡 Moderately Hard | reservoir |
| Tigard, Oregon | 38.5 mg/L | 1.6 ppt | 🟢 Soft | reservoir |
| Sherwood, Oregon | 40 mg/L | 1.6 ppt | 🟢 Soft | reservoir |
| Wilsonville, Oregon | 14.5 mg/L | 1.1 ppt | 🟢 Soft | reservoir |
| Lake Oswego, Oregon | 23.5 mg/L | 1.3 ppt | 🟢 Soft | reservoir |
National Benchmark
How Tualatin compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Tualatin | 67 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Tualatin's Water Unique?
Local geology and source profile
Tualatin, Oregon, in Washington County — a major south Portland suburban community (Tualatin is a significant Washington County city — a south Portland suburb adjacent to Tigard and Lake Oswego; Tualatin is known for its beautiful Tualatin Commons (a central lake and urban park that serves as the heart of Tualatin's downtown redevelopment — the Tualatin Commons has been a model for suburban downtown revitalization in the Portland metro, combining a man-made lake, trails, and commercial development into one of the most attractive suburban downtowns in the region); Tualatin has been one of the most successful suburban economic development stories in the Portland metro, with major logistics and technology employers along its I-5 corridor), a diverse Washington County community with a primarily professional, tech, and middle-class suburban family population, adjacent to Lake Oswego in the south Portland Washington County corridor — draws its municipal water supply via the Tualatin Valley Water District. Water hardness in Tualatin measures 67 mg/L — classified as moderately soft.
Tualatin's moderate softness reflects the south Portland Oregon Washington County Tualatin Valley watershed's calcareous-poor character. The Tualatin River watershed at Tualatin draws from the Quaternary calcareous-poor Tualatin Valley alluvium (calcareous-poor). TVWD produces the moderately soft 67 mg/L.
With hardness at 67 mg/L, Tualatin residents enjoy moderately soft water. Tualatin Valley Water District consistently delivers water meeting all Oregon DEQ and EPA Safe Drinking Water Act requirements.
Geology & Source: River supply from the Tualatin River watershed via the Tualatin Valley Water District — the Washington County south Portland Tualatin corridor (Quaternary calcareous-poor Tualatin Valley alluvium — the calcareous-poor south Portland Oregon Washington County Tualatin Valley watershed; effective treatment); moderately soft supply at 67 mg/L in Washington County.