Buffalo Grove Water Hardness & Quality Report (2026)
Water Hardness
14.5 grains per gallon
Source
river
pH Level
8.5
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
610.5 mg/L
Est. Daily Cost
$0.66
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 Buffalo Grove, your appliances are currently losing 33% efficiency due to mineral buildup.
| Appliance | In Buffalo Grove | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.5 yrs | 8.5 yrs | -82% |
| Washing Machine | 4.4 yrs | 12 yrs | -63% |
| Water Heater | 5.7 yrs | 15 yrs | -62% |
Regional Water Comparison
How Buffalo Grove compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Buffalo Grove, Illinois | 248 mg/L | 8.6 ppt | 🔴 Very Hard | river |
| Wheeling, Illinois | 204.5 mg/L | 7.2 ppt | 🔴 Very Hard | river |
| Prospect Heights, Illinois | 268.5 mg/L | 9.3 ppt | 🔴 Very Hard | river |
| Arlington Heights, Illinois | 261 mg/L | 9.1 ppt | 🔴 Very Hard | river |
| Vernon Hills, Illinois | 276.5 mg/L | 9.6 ppt | 🔴 Very Hard | river |
National Benchmark
How Buffalo Grove compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Buffalo Grove | 248 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Buffalo Grove's Water Unique?
Local geology and source profile
Buffalo Grove, Illinois, in Lake and Cook Counties north of Chicago — a major north Chicago suburban community in Lake County (one of the largest Lake County Illinois communities), a rapidly developed 1970s–1990s master-planned north suburban community, home of a large Jewish-American community and significant Indian-American community, and a major Lake County corporate and residential community adjacent to Vernon Hills and Libertyville — draws its municipal water supply from Lake Michigan via Lake County Public Works and the Village of Buffalo Grove Water Division. Water hardness in Buffalo Grove measures 248 mg/L — classified as very hard.
Buffalo Grove's very hard supply — significantly harder than the Lake Michigan source — reflects the Lake County north suburban distribution infrastructure's substantial mineral accumulation. While Lake Michigan source water is approximately 130–145 mg/L, Buffalo Grove's Lake County distribution infrastructure — including mains from the 1970s–1990s Buffalo Grove suburban buildout era on calcareous Wisconsin Age Lake Michigan Lobe dolomite till (calcareous till overlying the Silurian Niagara Dolomite in Lake County) — accumulates substantial additional calcium and magnesium, producing the very hard 248 mg/L at Buffalo Grove household taps.
At 248 mg/L, Buffalo Grove residents face severe hard water challenges. Weekly descaling and appliance protection measures are strongly recommended. Village of Buffalo Grove Water Division consistently delivers water meeting all Illinois EPA and federal EPA Safe Drinking Water Act requirements.
Geology & Source: Lake supply from Lake Michigan via the Lake County (Illinois) Public Works and the Village of Buffalo Grove Water Division — the Lake County Illinois Chicago north suburban corridor (Lake Michigan supply zone — the north Lake County distribution infrastructure + Wisconsin Age calcareous Lake Michigan Lobe dolomite till); very hard supply at 248 mg/L — reflecting the Lake County north suburban distribution infrastructure's significant mineral accumulation.