Farmington Hills 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
157.4 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 Hills, your appliances are currently losing 13% efficiency due to mineral buildup.
| Appliance | In Farmington Hills | 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 Hills compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Farmington Hills, Michigan | 97 mg/L | 5.9 ppt | 🟡 Moderately Hard | river |
| West Bloomfield Township, Michigan | 202.5 mg/L | 11.3 ppt | 🔴 Very Hard | river |
| Novi, Michigan | 177.5 mg/L | 10 ppt | 🟠 Hard | river |
| Livonia, Michigan | 239 mg/L | 13.1 ppt | 🔴 Very Hard | river |
| Redford, Michigan | 195.5 mg/L | 10.9 ppt | 🔴 Very Hard | river |
National Benchmark
How Farmington Hills compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Farmington Hills | 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 Hills's Water Unique?
Local geology and source profile
Farmington Hills, Michigan — a major Oakland County suburb west of Detroit, adjacent to Southfield and West Bloomfield — draws its municipal water supply from Lake Huron via the Great Lakes Water Authority (GLWA) and the City of Farmington Hills Water Division, receiving treated Lake Huron water through the Oakland County GLWA distribution network. Farmington Hills is one of Oakland County's largest communities in the GLWA service area. Water hardness in Farmington Hills measures 97 mg/L — classified as moderately soft, strikingly lower than neighboring Troy (232.5 mg/L) also in Oakland County.
Farmington Hills' notably lower hardness compared to Troy (both in Oakland County on GLWA Lake Huron water) may reflect a fundamentally different sub-network connection within the Oakland County GLWA distribution topology. Farmington Hills may receive water from a different transmission main or pressure zone — one that draws more directly from the GLWA primary treatment output with less local groundwater blending. The City of Farmington Hills may also operate its own separate connection point to the GLWA infrastructure that bypasses the higher-hardness Oakland County distribution node serving Troy. This type of spatial hardness variation within the same wholesale water system is consistent with varying levels of local groundwater blending across Oakland County's different sub-distribution zones.
With hardness at 97 mg/L, Farmington Hills residents experience light to moderate scale accumulation. Faucet aerators and showerheads develop deposits slowly. City of Farmington Hills Water Division and GLWA consistently deliver water meeting all Michigan EGLE and EPA Safe Drinking Water Act requirements.
Geology & Source: Lake supply from Lake Huron via the Great Lakes Water Authority (GLWA) and Oakland County Water Resources Commissioner distribution — the Oakland County western suburban zone; moderately soft supply at 97 mg/L in Oakland County — notably softer than neighboring Troy (232.5 mg/L), suggesting a different distribution zone or connection point within the Oakland County GLWA network.