Hampton Bays Water Hardness & Quality Report (2026)
Water Hardness
6.9 grains per gallon
Source
reservoir
pH Level
7.8
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
244.1 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 Hampton Bays, your appliances are currently losing 16% efficiency due to mineral buildup.
| Appliance | In Hampton Bays | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 5.7 yrs | 8.5 yrs | -33% |
| Washing Machine | 9.2 yrs | 12 yrs | -23% |
| Water Heater | 10.9 yrs | 15 yrs | -27% |
Regional Water Comparison
How Hampton Bays compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Hampton Bays, New York | 118.5 mg/L | 5.7 ppt | 🟡 Moderately Hard | reservoir |
| Riverhead, New York | 169 mg/L | 8 ppt | 🟠 Hard | reservoir |
| Manorville, New York | 152 mg/L | 7.3 ppt | 🟠 Hard | reservoir |
| Mastic, New York | 169.5 mg/L | 8.1 ppt | 🟠 Hard | reservoir |
| Mastic Beach, New York | 169.5 mg/L | 8.1 ppt | 🟠 Hard | reservoir |
National Benchmark
How Hampton Bays compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Hampton Bays | 118.5 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Hampton Bays's Water Unique?
Local geology and source profile
Hampton Bays, New York, in Suffolk County — a Suffolk County hamlet adjacent to Southampton and Westhampton Beach on the south shore of Long Island's South Fork — receives its water from the Suffolk County Water Authority, drawing from the Long Island Glacial Aquifer (Suffolk County) through the Hamptons distribution.
The moderately hard 118.5 mg/L hardness and TDS of 244.1 mg/L are harder than the north shore Suffolk communities (Stony Brook: 87.5 mg/L; Greenlawn: 94.5 mg/L) — reflecting Hampton Bays' position on the South Fork along the Ronkonkoma Moraine, where the thicker calcareous till deposits produce harder water than the Harbor Hills moraine of the north shore. The Long Island Glacial Aquifer at south Suffolk County — Pleistocene Ronkonkoma Moraine (calcareous — primary hardness contributor, thicker calcareous content vs north shore), Cretaceous Magothy Formation (insoluble — dilutant), and Cretaceous Lloyd Sand (insoluble — deep dilutant).
At 118.5 mg/L, Hampton Bays' 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 5.7 ppt warrants a certified drinking water filter — the Suffolk County Hamptons industrial corridor and Calverton Naval Weapons Station (Suffolk County — former AFFF) contribute to Hampton Bays' readings.
Geology & Source: Hampton Bays in Suffolk County draws from the Suffolk County Water Authority on the Long Island Glacial Aquifer (Suffolk County, south Long Island, New York) — the aquifer is developed in Pleistocene Ronkonkoma moraine (slightly calcareous) and Cretaceous Magothy Formation (insoluble) — New York Suffolk County Long Island south fork Pleistocene glacial aquifer produces moderately hard water at 118.5 mg/L with TDS 244.1 mg/L.