Wyandanch Water Hardness & Quality Report (2026)
Water Hardness
5.4 grains per gallon
Source
reservoir
pH Level
7.6
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
166.2 mg/L
Est. Daily Cost
$0.25
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 Wyandanch, your appliances are currently losing 12% efficiency due to mineral buildup.
| Appliance | In Wyandanch | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.5 yrs | 8.5 yrs | -24% |
| Washing Machine | 10.2 yrs | 12 yrs | -15% |
| Water Heater | 11.9 yrs | 15 yrs | -21% |
Regional Water Comparison
How Wyandanch compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Wyandanch, New York | 92.5 mg/L | 4.5 ppt | 🟡 Moderately Hard | reservoir |
| Deer Park, New York | 117.5 mg/L | 5.7 ppt | 🟡 Moderately Hard | reservoir |
| West Babylon, New York | 140.5 mg/L | 6.7 ppt | 🟠 Hard | reservoir |
| North Lindenhurst, New York | 68.5 mg/L | 3.4 ppt | 🟡 Moderately Hard | reservoir |
| North Babylon, New York | 173.5 mg/L | 8.3 ppt | 🟠 Hard | reservoir |
National Benchmark
How Wyandanch compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Wyandanch | 92.5 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Wyandanch's Water Unique?
Local geology and source profile
Wyandanch, New York, in Suffolk County — a Suffolk County hamlet adjacent to Wheatley Heights and West Babylon on the south shore of Long Island — receives its water from the Suffolk County Water Authority, drawing from the Long Island sole-source aquifer through the south-central Long Island distribution.
The moderately soft 92.5 mg/L hardness and TDS of 166.2 mg/L reflect the Suffolk County aquifer supply's soft-to-moderate character — the Cretaceous Lloyd Sand is a deep, predominantly insoluble sand formation, but the Pleistocene glacial outwash and Holocene beach deposits in the Wyandanch area contain somewhat more calcareous fragments than the typical north shore zones (compare Wheatley Heights NY: 90/162 in Suffolk County comparable; West Babylon NY: 94/170 in Suffolk County comparable; Wyandanch consistent moderate from the same Suffolk County Long Island Cretaceous aquifer supply). The Long Island aquifer — Cretaceous Lloyd Sand (insoluble — primary dilutant), Pleistocene glacial outwash (slightly calcareous — primary hardness contributor), and Holocene south shore beach deposits (slightly calcareous — TDS contributor).
At 92.5 mg/L with TDS 166, Wyandanch's water is moderately soft — minimal scale buildup. The PFAS level of 4.5 ppt is moderate — review the Suffolk County Water Authority's annual water quality report, which monitors the Long Island aquifer extensively for legacy contamination sources.
Geology & Source: Wyandanch in Suffolk County draws from the Suffolk County Water Authority on the Long Island aquifer (Suffolk County, south-central New York) — the Long Island aquifer drains Cretaceous Lloyd Sand (insoluble) and Pleistocene glacial outwash (slightly calcareous) — New York Suffolk County Long Island Cretaceous aquifer supply produces moderately soft water at 92.5 mg/L with TDS 166.2 mg/L.