Grosse Ile Water Hardness & Quality Report (2026)
Water Hardness
4.7 grains per gallon
Source
river
pH Level
7.4
neutral = 7.0
Lead
0.001 mg/L
✓ Below action level
TDS
121.2 mg/L
Est. Daily Cost
$0.21
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 Grosse Ile, your appliances are currently losing 11% efficiency due to mineral buildup.
| Appliance | In Grosse Ile | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.9 yrs | 8.5 yrs | -19% |
| Washing Machine | 10.6 yrs | 12 yrs | -12% |
| Water Heater | 12.4 yrs | 15 yrs | -17% |
Regional Water Comparison
How Grosse Ile compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Grosse Ile, Michigan | 80.5 mg/L | 5.1 ppt | 🟡 Moderately Hard | river |
| Trenton, Michigan | 224.5 mg/L | 12.4 ppt | 🔴 Very Hard | river |
| Riverview, Michigan | 222 mg/L | 12.3 ppt | 🔴 Very Hard | river |
| Wyandotte, Michigan | 87.5 mg/L | 5.4 ppt | 🟡 Moderately Hard | river |
| Woodhaven, Michigan | 248 mg/L | 13.6 ppt | 🔴 Very Hard | river |
National Benchmark
How Grosse Ile compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Grosse Ile | 80.5 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Grosse Ile's Water Unique?
Local geology and source profile
Grosse Ile, Michigan, in Wayne County — a Wayne County island township adjacent to Trenton and Riverview on the Detroit River in southeast Michigan — receives its water from the Great Lakes Water Authority or a local district, drawing from the Detroit River through the southeast Michigan distribution.
The soft 80.5 mg/L hardness and low TDS of 121.2 mg/L reflect the Wayne County Detroit River supply's soft Great Lakes character — the Precambrian Canadian Shield is highly insoluble, while Devonian Dundee Limestone contributes modest dissolved minerals, and the enormous Lake Erie-Detroit River system dilutes hardness to below-average levels (compare Trenton MI: 78/117 in Wayne County comparable; Riverview MI: 82/125 in Wayne County comparable; Grosse Ile consistent soft from the same Wayne County Detroit River Precambrian-Devonian calcareous supply). The Detroit River — Precambrian Canadian Shield (insoluble — primary dilutant), Devonian Dundee Limestone (calcareous — primary hardness contributor), and Quaternary Great Lakes alluvium (slightly calcareous — minor TDS).
At 80.5 mg/L with TDS 121, Grosse Ile's water is soft — minimal scale buildup. Annual descaling is appropriate. The PFAS level of 5.1 ppt is moderate — a certified drinking water filter provides added protection given the Wayne County southeast Michigan industrial waterfront legacy. Review Great Lakes Water Authority's annual water quality report.
Geology & Source: Grosse Ile in Wayne County draws from the Great Lakes Water Authority on the Detroit River (Wayne County, southeast Michigan) — the Detroit River at Wayne County drains Precambrian Canadian Shield (insoluble) and Devonian Dundee Limestone (calcareous) — Michigan Wayne County Detroit River Precambrian-Devonian calcareous supply produces soft water at 80.5 mg/L with TDS 121.2 mg/L.