Pleasant Hill Water Hardness & Quality Report (2026)
Water Hardness
8.4 grains per gallon
Source
mixed
pH Level
8
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
410.9 mg/L
Est. Daily Cost
$0.38
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 Pleasant Hill, your appliances are currently losing 19% efficiency due to mineral buildup.
| Appliance | In Pleasant Hill | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.8 yrs | 8.5 yrs | -44% |
| Washing Machine | 8.3 yrs | 12 yrs | -31% |
| Water Heater | 9.8 yrs | 15 yrs | -35% |
Regional Water Comparison
How Pleasant Hill compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Pleasant Hill, California | 144 mg/L | 6.2 ppt | 🟠 Hard | mixed |
| Walnut Creek, California | 147 mg/L | 6.3 ppt | 🟠 Hard | mixed |
| Concord, California | 97 mg/L | 4.8 ppt | 🟡 Moderately Hard | mixed |
| Lafayette, California | 53 mg/L | 3.6 ppt | 🟢 Soft | mixed |
| Alamo, California | 43.5 mg/L | 3.3 ppt | 🟢 Soft | mixed |
National Benchmark
How Pleasant Hill compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Pleasant Hill | 144 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Pleasant Hill's Water Unique?
Local geology and source profile
Pleasant Hill, California, in Contra Costa County — a major central Contra Costa County suburban community (Pleasant Hill is centrally located in the contra Costa County suburban East Bay — a major residential and commercial community adjacent to Concord and Walnut Creek), home of Diablo Valley College (one of the largest community colleges in California, located in Pleasant Hill — a major Contra Costa County educational institution serving the entire central East Bay), a diverse Contra Costa County community with a significant South Asian-American, Filipino-American, and professional population, and part of the central Contra Costa County BART (Bay Area Rapid Transit) corridor — draws its municipal water supply via the East Bay Municipal Utility District (EBMUD) or Contra Costa Water District. Water hardness in Pleasant Hill measures 144 mg/L — classified as moderately hard.
Pleasant Hill's moderate hardness — noticeably harder than San Francisco's Hetch Hetchy supply — reflects the East Bay MUD's Mokelumne River supply characteristics and Contra Costa County distribution. The Mokelumne River (Pardee Reservoir) drains the Sierra Nevada calcareous-poor Cretaceous granite (raw hardness approximately 20–60 mg/L), but EBMUD blends and distributes through longer central Contra Costa County mains, accumulating moderate dissolved minerals, producing the moderate 144 mg/L.
At 144 mg/L, Pleasant Hill residents encounter moderate scale accumulation. Monthly cleaning with citric acid solution is recommended. EBMUD consistently delivers water meeting all California State Water Board and EPA Safe Drinking Water Act requirements.
Geology & Source: Mountain reservoir supply from the Mokelumne River (Pardee and Camanche Reservoirs) via the Contra Costa Water District (CCWD) or East Bay Municipal Utility District (EBMUD) — the Contra Costa County central suburban East Bay corridor (Sierra Nevada calcareous-poor Mokelumne granite watershed — the East Bay MUD and CCWD treated supply; Pleasant Hill central Contra Costa distribution); moderately hard supply at 144 mg/L in Contra Costa County.