Grosse Pointe Park Water Hardness & Quality Report (2026)
Water Hardness
4.8 grains per gallon
Source
river
pH Level
7.4
neutral = 7.0
Lead
0.001 mg/L
✓ Below action level
TDS
123.3 mg/L
Est. Daily Cost
$0.22
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 Pointe Park, your appliances are currently losing 11% efficiency due to mineral buildup.
| Appliance | In Grosse Pointe Park | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.9 yrs | 8.5 yrs | -19% |
| Washing Machine | 10.6 yrs | 12 yrs | -12% |
| Water Heater | 12.3 yrs | 15 yrs | -18% |
Regional Water Comparison
How Grosse Pointe Park compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Grosse Pointe Park, Michigan | 81.5 mg/L | 5.1 ppt | 🟡 Moderately Hard | river |
| Harper Woods, Michigan | 114.5 mg/L | 6.8 ppt | 🟡 Moderately Hard | river |
| Grosse Pointe Woods, Michigan | 82 mg/L | 5.1 ppt | 🟡 Moderately Hard | river |
| Eastpointe, Michigan | 215 mg/L | 11.9 ppt | 🔴 Very Hard | river |
| Hamtramck, Michigan | 103.5 mg/L | 6.2 ppt | 🟡 Moderately Hard | river |
National Benchmark
How Grosse Pointe Park compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Grosse Pointe Park | 81.5 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 Pointe Park's Water Unique?
Local geology and source profile
Grosse Pointe Park, Michigan, in Wayne County — a Wayne County city adjacent to Harper Woods and Detroit on Lake Saint Clair in southeast Michigan — receives its water from the Great Lakes Water Authority (GLWA) through Detroit Water, drawing from Lake Huron through the southeast Michigan distribution.
The soft 81.5 mg/L hardness and TDS of 123.3 mg/L reflect the Wayne County Lake Huron supply's soft character — the Lake Huron basin's Silurian Niagaran Dolomite contributes modest dissolved minerals, but the vast volume of Lake Huron dilutes mineralization significantly (compare Harper Woods MI: 79/119 in Wayne County comparable; Detroit MI: 83/127 in Wayne County comparable; Grosse Pointe Park consistent soft from the same Wayne County Lake Huron Detroit Water Silurian supply). The Lake Huron supply at Wayne County — Silurian Niagaran Dolomite (slightly dolomitic — primary hardness contributor), Precambrian Canadian Shield (insoluble — primary dilutant), and Quaternary Great Lakes basin sediment (slightly calcareous — minor TDS).
At 81.5 mg/L with TDS 123, Grosse Pointe Park'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. Review the Great Lakes Water Authority's annual water quality report.
Geology & Source: Grosse Pointe Park in Wayne County draws from the Detroit Water on Lake Huron (Wayne County, southeast Michigan) — the Lake Huron supply at Wayne County drains Silurian Niagaran Dolomite (slightly dolomitic) and Precambrian Canadian Shield (insoluble) — Michigan Wayne County Lake Huron Detroit Water Silurian supply produces soft water at 81.5 mg/L with TDS 123.3 mg/L.