South Farmingdale Water Hardness & Quality Report (2026)
Water Hardness
9.2 grains per gallon
Source
reservoir
pH Level
8.1
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
387.4 mg/L
Est. Daily Cost
$0.42
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 South Farmingdale, your appliances are currently losing 21% efficiency due to mineral buildup.
| Appliance | In South Farmingdale | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.4 yrs | 8.5 yrs | -48% |
| Washing Machine | 7.8 yrs | 12 yrs | -35% |
| Water Heater | 9.3 yrs | 15 yrs | -38% |
Regional Water Comparison
How South Farmingdale compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ South Farmingdale, New York | 157 mg/L | 7.5 ppt | 🟠 Hard | reservoir |
| North Amityville, New York | 173.5 mg/L | 8.3 ppt | 🟠 Hard | reservoir |
| North Massapequa, New York | 69 mg/L | 3.4 ppt | 🟡 Moderately Hard | reservoir |
| Massapequa Park, New York | 168 mg/L | 8 ppt | 🟠 Hard | reservoir |
| East Massapequa, New York | 172.5 mg/L | 8.2 ppt | 🟠 Hard | reservoir |
National Benchmark
How South Farmingdale compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ South Farmingdale | 157 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes South Farmingdale's Water Unique?
Local geology and source profile
South Farmingdale, New York, in Nassau County — a Nassau County community adjacent to Farmingdale and Bethpage in central Long Island — receives its water from the Nassau County Water Authority (NCWA), drawing from the Long Island Aquifer (Nassau County) through the central Long Island distribution.
The hard 157 mg/L hardness and TDS of 387.4 mg/L are substantially harder than the western Nassau County communities (North New Hyde Park: 69.5 mg/L) — reflecting the central Nassau County Long Island Aquifer's more mineralized character at the Farmingdale position, similar to other central Nassau communities (Levittown: ~155 mg/L; Bethpage: ~157 mg/L). The Long Island Aquifer at central Nassau County is developed in Pleistocene glacial outwash (slightly calcareous), Cretaceous Magothy Aquifer (slightly calcareous — primary hardness contributor at the central Nassau depth), and Cretaceous Lloyd Sand (insoluble). The more concentrated central Nassau County Long Island Aquifer produces the hard supply.
At 157 mg/L, South Farmingdale's water is hard — scale builds steadily in kettles and appliances, dishwashers benefit from rinse aid, and water heaters should be descaled annually. Monthly descaling is recommended. The PFAS level of 7.5 ppt warrants a certified drinking water filter — Republic Airport (Suffolk County — AFFF), Bethpage State Park (Nassau County — legacy Grumman industrial PFAS), and the central Long Island Nassau County industrial corridor contribute to South Farmingdale's readings.
Geology & Source: South Farmingdale in Nassau County draws from the Nassau County Water Authority on the Long Island Aquifer (Nassau County, central Long Island) — the Long Island Aquifer at Nassau County is developed in Pleistocene glacial outwash and Cretaceous Magothy Aquifer (slightly calcareous) — New York Nassau County Long Island Pleistocene-Cretaceous sandy aquifer produces hard water at 157 mg/L with TDS 387.4 mg/L.