Greenfield Water Hardness & Quality Report (2026)
Water Hardness
14.6 grains per gallon
Source
groundwater
pH Level
8.5
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
805.6 mg/L
Est. Daily Cost
$0.67
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 Greenfield, your appliances are currently losing 33% efficiency due to mineral buildup.
| Appliance | In Greenfield | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.5 yrs | 8.5 yrs | -82% |
| Washing Machine | 4.3 yrs | 12 yrs | -64% |
| Water Heater | 5.6 yrs | 15 yrs | -63% |
Regional Water Comparison
How Greenfield compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Greenfield, Wisconsin | 250 mg/L | 6.5 ppt | 🔴 Very Hard | groundwater |
| Greendale, Wisconsin | 249.5 mg/L | 6.5 ppt | 🔴 Very Hard | groundwater |
| West Allis, Wisconsin | 260 mg/L | 6.8 ppt | 🔴 Very Hard | groundwater |
| Franklin, Wisconsin | 145 mg/L | 4.1 ppt | 🟠 Hard | groundwater |
| Wauwatosa, Wisconsin | 240 mg/L | 6.3 ppt | 🔴 Very Hard | groundwater |
National Benchmark
How Greenfield compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Greenfield | 250 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Greenfield's Water Unique?
Local geology and source profile
Greenfield, Wisconsin, in Milwaukee County — a major south Milwaukee County suburban community directly south of Milwaukee's city boundary, a primarily residential south Milwaukee suburb with several prominent commercial corridors, a diverse Milwaukee County community with a significant Polish-American, German-American, and Latino-American population, and adjacent to Hales Corners, West Allis, and Milwaukee in the south Milwaukee County suburban corridor — draws its municipal water supply from the deep Milwaukee County sandstone aquifer via the City of Greenfield Water Division. Water hardness in Greenfield measures 250 mg/L — classified as very hard.
Greenfield's very hard supply reflects the Milwaukee County deep Paleozoic aquifer's highly calcareous character. The Milwaukee County deep aquifer draws from: the Silurian Niagara Dolomite (the primary calcareous dolomite aquifer of the Lake Michigan basin — Lockport Dolomite equivalent); the Cambrian–Ordovician St. Peter Sandstone and Prairie du Chien Dolomite (highly calcareous Cambrian–Ordovician carbonate and sandstone of the Wisconsin deep aquifer). The highly calcareous Silurian–Cambrian Paleozoic aquifer system in Milwaukee County produces the very hard 250 mg/L.
At 250 mg/L, Greenfield residents face severe hard water challenges. Weekly descaling and appliance protection measures are strongly recommended. City of Greenfield Water Division consistently delivers water meeting all Wisconsin DNR and EPA Safe Drinking Water Act requirements.
Geology & Source: Groundwater from the Milwaukee County deep sandstone aquifer (Cambrian–Ordovician Mount Simon–Hinckley Sandstone) via the City of Greenfield Water Division — the Milwaukee County south suburban Wisconsin lake plain (Silurian Niagara Dolomite and Cambrian–Ordovician calcareous sandstone of the Milwaukee County aquifer; deeper calcareous aquifer strata); very hard supply at 250 mg/L — reflecting the Milwaukee County deep calcareous aquifer geology.