Nesconset Water Hardness & Quality Report (2026)
Water Hardness
9 grains per gallon
Source
reservoir
pH Level
8.1
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
372.9 mg/L
Est. Daily Cost
$0.41
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 Nesconset, your appliances are currently losing 20% efficiency due to mineral buildup.
| Appliance | In Nesconset | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.5 yrs | 8.5 yrs | -47% |
| Washing Machine | 7.9 yrs | 12 yrs | -34% |
| Water Heater | 9.5 yrs | 15 yrs | -37% |
Regional Water Comparison
How Nesconset compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Nesconset, New York | 153.5 mg/L | 7.3 ppt | 🟠 Hard | reservoir |
| Saint James, New York | 109.5 mg/L | 5.3 ppt | 🟡 Moderately Hard | reservoir |
| Lake Ronkonkoma, New York | 179 mg/L | 8.5 ppt | 🟠 Hard | reservoir |
| Ronkonkoma, New York | 70.5 mg/L | 3.4 ppt | 🟡 Moderately Hard | reservoir |
| Smithtown, New York | 144 mg/L | 6.9 ppt | 🟠 Hard | reservoir |
National Benchmark
How Nesconset compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Nesconset | 153.5 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Nesconset's Water Unique?
Local geology and source profile
Nesconset, New York, in Suffolk County — a Suffolk County hamlet adjacent to Smithtown and Hauppauge in central Long Island — receives its water from the Suffolk County Water Authority, drawing from the Long Island Glacial Aquifer (Suffolk County) through the central Long Island distribution.
The moderately hard 153.5 mg/L hardness and TDS of 372.9 mg/L are notably harder than most Long Island communities — reflecting Nesconset's position over the deeper portion of the Long Island glacial aquifer in central Suffolk County where the Pleistocene Ronkonkoma Moraine's calcareous till contributes elevated carbonate and the TDS is elevated by the longer aquifer residence time in the central island's stratified drift. The Long Island Glacial Aquifer at central Suffolk County — Pleistocene Ronkonkoma Moraine (calcareous — primary hardness contributor), Pleistocene stratified drift (slightly calcareous — TDS contributor from longer residence time), and Cretaceous Magothy Formation (insoluble — dilutant).
At 153.5 mg/L, Nesconset'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 7.3 ppt warrants a certified drinking water filter — Grumman/Northrop legacy sites (Nassau-Suffolk County — industrial PFAS) contribute to Nesconset's elevated readings.
Geology & Source: Nesconset in Suffolk County draws from the Suffolk County Water Authority on the Long Island Glacial Aquifer (Suffolk County, central Long Island, New York) — the aquifer is developed in Pleistocene Ronkonkoma moraine (calcareous) and Cretaceous Magothy Formation (insoluble) — New York Suffolk County Long Island Pleistocene glacial aquifer produces moderately hard water at 153.5 mg/L with TDS 372.9 mg/L.