Farmington Water Hardness & Quality Report (2026)
Water Hardness
5.7 grains per gallon
Source
river
pH Level
7.5
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
157.2 mg/L
Est. Daily Cost
$0.26
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 Farmington, your appliances are currently losing 13% efficiency due to mineral buildup.
| Appliance | In Farmington | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.4 yrs | 8.5 yrs | -25% |
| Washing Machine | 10 yrs | 12 yrs | -17% |
| Water Heater | 11.7 yrs | 15 yrs | -22% |
Regional Water Comparison
How Farmington compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Farmington, Michigan | 97 mg/L | 5.9 ppt | 🟡 Moderately Hard | river |
| Farmington Hills, Michigan | 97 mg/L | 5.9 ppt | 🟡 Moderately Hard | river |
| Livonia, Michigan | 239 mg/L | 13.1 ppt | 🔴 Very Hard | river |
| Novi, Michigan | 177.5 mg/L | 10 ppt | 🟠 Hard | river |
| West Bloomfield Township, Michigan | 202.5 mg/L | 11.3 ppt | 🔴 Very Hard | river |
National Benchmark
How Farmington compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Farmington | 97 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Farmington's Water Unique?
Local geology and source profile
Farmington, Michigan, in Oakland County — an Oakland County city adjacent to Farmington Hills and Novi in the northwest Detroit suburbs — receives its water from the Great Lakes Water Authority (GLWA), drawing from Lake Huron through the southeast Michigan distribution.
The moderately hard 97 mg/L hardness and TDS of 157.2 mg/L reflect the Oakland County Lake Huron supply's moderate dolomitic character — the Silurian Niagaran Dolomite and Devonian Traverse Limestone are calcareous-dolomitic formations in the Great Lakes Basin; the Lake Huron supply is treated to produce notably softer water than Michigan's deep dolomite aquifer communities (compare Farmington Hills MI: 94/151 in Oakland County comparable; Novi MI: 100/163 in Oakland County comparable; Farmington consistent moderate from the same Oakland County Lake Huron Silurian dolomitic supply). The Lake Huron supply — Silurian Niagaran Dolomite (highly dolomitic — primary hardness contributor), Devonian Traverse Limestone (calcareous — secondary contributor), and Quaternary Great Lakes glacial till (calcareous — minor TDS).
At 97 mg/L with TDS 157, Farmington's water is moderately hard — mild scale buildup. Semi-annual descaling is appropriate. The PFAS level of 5.9 ppt warrants a certified drinking water filter. Review GLWA's annual water quality report.
Geology & Source: Farmington in Oakland County draws from the Great Lakes Water Authority on the Lake Huron supply (Oakland County, southeast Michigan) — Lake Huron at Oakland County draws from Silurian Niagaran Dolomite (highly dolomitic) and Devonian Traverse Limestone (calcareous) — Michigan Oakland County Lake Huron Silurian dolomitic supply produces moderately hard water at 97 mg/L with TDS 157.2 mg/L.