East Hill-Meridian Water Hardness & Quality Report (2026)
Water Hardness
3 grains per gallon
Source
reservoir
pH Level
7.5
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
109.1 mg/L
Est. Daily Cost
$0.13
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 East Hill-Meridian, your appliances are currently losing 7% efficiency due to mineral buildup.
| Appliance | In East Hill-Meridian | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.9 yrs | 8.5 yrs | -7% |
| Washing Machine | 11.7 yrs | 12 yrs | -3% |
| Water Heater | 13.6 yrs | 15 yrs | -9% |
Regional Water Comparison
How East Hill-Meridian compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ East Hill-Meridian, Washington | 50.5 mg/L | 2.4 ppt | 🟢 Soft | reservoir |
| Fairwood, Washington | 64.5 mg/L | 2.9 ppt | 🟡 Moderately Hard | reservoir |
| Kent, Washington | 74.5 mg/L | 3.2 ppt | 🟡 Moderately Hard | reservoir |
| Covington, Washington | 55 mg/L | 2.6 ppt | 🟢 Soft | reservoir |
| Renton, Washington | 27.5 mg/L | 1.7 ppt | 🟢 Soft | reservoir |
National Benchmark
How East Hill-Meridian compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ East Hill-Meridian | 50.5 mg/L | 🟢 None |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes East Hill-Meridian's Water Unique?
Local geology and source profile
East Hill–Meridian, Washington, an unincorporated community in King County — a major south King County suburban community (East Hill–Meridian is a significant unincorporated King County community — a large south King County suburban area in the Kent–Auburn–Covington plateau corridor south of Renton; East Hill is part of the broader Kent–Covington suburban belt and one of the largest unincorporated areas in King County), a diverse King County community with a significant Southeast Asian-American (Somali-American, Vietnamese-American, Filipino-American), African-American, and working-class suburban family population, adjacent to Kent and Covington in the south King County corridor, home of significant suburban residential development in the south King County plateau, and a community with excellent access to south King County employment centers — draws its municipal water supply via the Covington Water District. Water hardness in East Hill–Meridian measures 50.5 mg/L — classified as moderately soft.
East Hill–Meridian's moderate softness reflects the south King County Cascade foothills watershed's calcareous-poor geology. The Cedar River and Tolt River watersheds draw from Precambrian and Oligocene Cascade Mountains crystalline (calcareous-poor). Covington Water District produces the moderately soft 50.5 mg/L.
With hardness at 50.5 mg/L, East Hill–Meridian residents enjoy moderately soft water. Covington Water District consistently delivers water meeting all Washington DOE and EPA Safe Drinking Water Act requirements.
Geology & Source: Mixed supply from the Cedar River and Tolt River watersheds via the Seattle Public Utilities or Covington Water District — the King County south King County suburban East Hill–Meridian corridor (Cascade Mountains calcareous-poor Precambrian metamorphic and Oligocene volcanic — the extremely calcareous-poor south Seattle Cascade foothills watershed; SPU effective treatment); moderately soft supply at 50.5 mg/L in King County.