West Hempstead Water Hardness & Quality Report (2026)
Water Hardness
8.7 grains per gallon
Source
reservoir
pH Level
8
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
357.4 mg/L
Est. Daily Cost
$0.40
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 West Hempstead, your appliances are currently losing 20% efficiency due to mineral buildup.
| Appliance | In West Hempstead | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.7 yrs | 8.5 yrs | -45% |
| Washing Machine | 8.1 yrs | 12 yrs | -33% |
| Water Heater | 9.6 yrs | 15 yrs | -36% |
Regional Water Comparison
How West Hempstead compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ West Hempstead, New York | 149.5 mg/L | 7.2 ppt | 🟠 Hard | reservoir |
| Franklin Square, New York | 143 mg/L | 6.9 ppt | 🟠 Hard | reservoir |
| Garden City, New York | 158 mg/L | 7.6 ppt | 🟠 Hard | reservoir |
| Hempstead, New York | 143.5 mg/L | 6.9 ppt | 🟠 Hard | reservoir |
| Mineola, New York | 95 mg/L | 4.6 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How West Hempstead compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ West Hempstead | 149.5 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes West Hempstead's Water Unique?
Local geology and source profile
West Hempstead, New York, in Nassau County — an unincorporated Nassau County community adjacent to Valley Stream and Hempstead, in the central-south Nassau County suburban corridor on the Long Island Railroad West Hempstead Branch — receives its municipal water from Nassau County DPW, drawing from the Upper Glacial Aquifer and Magothy Aquifer through production wells in central-south Nassau County.
The moderately hard 149.5 mg/L hardness and TDS of 357.4 mg/L are consistent with the central Nassau County aquifer at intermediate to deeper well depths — harder and more mineralized than the Mineola central Nassau reading (95 mg/L, TDS 173), reflecting that the West Hempstead wells access deeper or more mineralized portions of the Magothy zone. The Nassau County aquifer character varies significantly by depth and location, with the central-south Nassau zone producing intermediate hardness between the very soft north Nassau Upper Glacial and the very hard south-shore deep Magothy wells.
At 149.5 mg/L, West Hempstead's water is moderately hard — scale builds in kettles and appliances over months, dishwashers benefit from rinse aid, and bathroom fixtures develop calcium deposits. Quarterly descaling is appropriate. The PFAS level of 7.2 ppt warrants a certified drinking water filter — the Grumman Bethpage PFAS plume (central Nassau County), the Long Island defense-manufacturing legacy, and the south Nassau PFAS complex contribute to West Hempstead's readings.
Geology & Source: West Hempstead in Nassau County draws from Nassau County DPW on the Upper Glacial Aquifer and Magothy Aquifer (central-south Nassau County, Long Island) — the Nassau County aquifer accesses Pleistocene outwash sand and Cretaceous Magothy calcareous sand — Long Island central-south Nassau County aquifer produces moderately hard water at 149.5 mg/L with TDS 357 mg/L in this Nassau County New York community.