Wantagh Water Hardness & Quality Report (2026)
Water Hardness
7.1 grains per gallon
Source
reservoir
pH Level
7.8
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
253.6 mg/L
Est. Daily Cost
$0.32
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 Wantagh, your appliances are currently losing 16% efficiency due to mineral buildup.
| Appliance | In Wantagh | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 5.6 yrs | 8.5 yrs | -34% |
| Washing Machine | 9.1 yrs | 12 yrs | -24% |
| Water Heater | 10.8 yrs | 15 yrs | -28% |
Regional Water Comparison
How Wantagh compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Wantagh, New York | 121 mg/L | 5.8 ppt | 🟠 Hard | reservoir |
| Bellmore, New York | 78.5 mg/L | 3.9 ppt | 🟡 Moderately Hard | reservoir |
| North Bellmore, New York | 174 mg/L | 8.3 ppt | 🟠 Hard | reservoir |
| Seaford, New York | 97.5 mg/L | 4.7 ppt | 🟡 Moderately Hard | reservoir |
| Massapequa, New York | 168 mg/L | 8 ppt | 🟠 Hard | reservoir |
National Benchmark
How Wantagh compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Wantagh | 121 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Wantagh's Water Unique?
Local geology and source profile
Wantagh, New York, in Nassau County — an unincorporated Nassau County community adjacent to Seaford and Levittown, on the South Shore of Long Island at the Jones Beach barrier island access — receives its municipal water from the Nassau County DPW or the Wantagh Water District, drawing from the Magothy Aquifer through production wells in south Nassau County.
The moderately hard 121 mg/L hardness and TDS of 253.6 mg/L reflect the intermediate-depth Wantagh area Magothy Aquifer character — between the very soft Upper Glacial wells (Ronkonkoma: 70.5 mg/L) and the very mineralized deep south shore wells (East Massapequa: 172.5 mg/L, TDS 454). The Wantagh water district accesses the Magothy Formation at a moderate depth that produces moderately hard water with intermediate TDS, characteristic of the south Nassau County south shore aquifer transition zone between the shallower, softer wells and the deeper, harder wells near the salt-fresh interface.
At 121 mg/L, Wantagh's water is moderately hard — scale builds in kettles and appliances over months, dishwashers benefit from rinse aid, and faucet aerators need periodic cleaning. Quarterly descaling is appropriate. The PFAS level of 5.8 ppt warrants a certified drinking water filter — the Grumman Bethpage PFAS plume (south Nassau County), the Jones Beach State Parkway AFFF legacy, and the Long Island aviation PFAS corridor contribute to Wantagh's readings.
Geology & Source: Wantagh in Nassau County draws from Nassau County DPW or the Wantagh Water District on the Magothy Aquifer (south Nassau County, Long Island) — the Magothy consists of Cretaceous Magothy Formation calcareous sand (intermediate-depth south Nassau zone) — Long Island south Nassau Cretaceous Magothy Aquifer produces moderately hard water at 121 mg/L with TDS 254 mg/L in this Nassau County New York community.