Southfield Water Hardness & Quality Report (2026)
Water Hardness
5.9 grains per gallon
Source
river
pH Level
7.6
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
165.4 mg/L
Est. Daily Cost
$0.27
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 Southfield, your appliances are currently losing 13% efficiency due to mineral buildup.
| Appliance | In Southfield | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.3 yrs | 8.5 yrs | -26% |
| Washing Machine | 9.9 yrs | 12 yrs | -17% |
| Water Heater | 11.6 yrs | 15 yrs | -23% |
Regional Water Comparison
How Southfield compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Southfield, Michigan | 100.5 mg/L | 6.1 ppt | 🟡 Moderately Hard | river |
| Oak Park, Michigan | 185.5 mg/L | 10.4 ppt | 🔴 Very Hard | river |
| Berkley, Michigan | 160.5 mg/L | 9.1 ppt | 🟠 Hard | river |
| Birmingham, Michigan | 188.5 mg/L | 10.6 ppt | 🔴 Very Hard | river |
| Royal Oak, Michigan | 84 mg/L | 5.3 ppt | 🟡 Moderately Hard | river |
National Benchmark
How Southfield compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Southfield | 100.5 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Southfield's Water Unique?
Local geology and source profile
Southfield, Michigan, in southeast Oakland County immediately north of Detroit's Eight Mile Road boundary — a major Detroit suburb known for its office park and corporate campus development — draws its municipal water supply through the City of Southfield Water Division, sourcing from Great Lakes Water Authority (GLWA) Lake Huron wholesale water via the Oakland County distribution network. Southfield is in the southeast Oakland County portion of the GLWA service area, adjacent to Detroit. Water hardness in Southfield measures 100.5 mg/L — classified as moderately hard, strikingly softer than Oakland County neighbors Troy (232.5 mg/L) and Rochester Hills (227.5 mg/L).
Southfield's dramatically softer supply compared to other Oakland County GLWA cities reflects Southfield's geographic position on the Oakland–Wayne County border and its likely different sub-network supply connection. Southfield, adjacent to Detroit, may receive GLWA water primarily through the Detroit DWSD/GLWA Wayne County transmission system — drawing through the 8 Mile corridor infrastructure more aligned with the Wayne County distribution zone (where cities like Dearborn and Canton show 130–140 mg/L) rather than through the northern Oakland County high-hardness transmission system. The softer supply reflects a fundamentally different distribution path through the Detroit-adjacent infrastructure.
With hardness at 100.5 mg/L, Southfield residents experience light to moderate scale accumulation. Faucet aerators and showerheads develop deposits slowly — bi-monthly cleaning with citric acid solution is sufficient. City of Southfield Water Division and GLWA consistently deliver water meeting all Michigan EGLE and EPA Safe Drinking Water Act requirements.
Geology & Source: Mixed supply from Great Lakes Water Authority (GLWA) Lake Huron and local Oakland County groundwater via the City of Southfield Water Division — the southeast Oakland County GLWA distribution zone; moderately hard supply at 100.5 mg/L in Oakland County — notably softer than neighboring Oakland County cities (Troy: 232.5 mg/L), suggesting a different distribution sub-network serving Southfield.