Hauppauge Water Hardness & Quality Report (2026)
Water Hardness
7.7 grains per gallon
Source
reservoir
pH Level
7.9
neutral = 7.0
Lead
0.006 mg/L
✓ Below action level
TDS
293.3 mg/L
Est. Daily Cost
$0.35
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 Hauppauge, your appliances are currently losing 18% efficiency due to mineral buildup.
| Appliance | In Hauppauge | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 5.2 yrs | 8.5 yrs | -39% |
| Washing Machine | 8.7 yrs | 12 yrs | -28% |
| Water Heater | 10.3 yrs | 15 yrs | -31% |
Regional Water Comparison
How Hauppauge compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Hauppauge, New York | 132.5 mg/L | 6.4 ppt | 🟠 Hard | reservoir |
| Smithtown, New York | 144 mg/L | 6.9 ppt | 🟠 Hard | reservoir |
| Central Islip, New York | 114.5 mg/L | 5.5 ppt | 🟡 Moderately Hard | reservoir |
| Nesconset, New York | 153.5 mg/L | 7.3 ppt | 🟠 Hard | reservoir |
| Ronkonkoma, New York | 70.5 mg/L | 3.4 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How Hauppauge compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Hauppauge | 132.5 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Hauppauge's Water Unique?
Local geology and source profile
Hauppauge, New York, in Suffolk County — a major Suffolk County commercial and industrial hub in the Hauppauge Industrial Park (one of the largest industrial parks in the eastern US), a central Long Island community combining heavy industrial, office, and residential land uses — receives its municipal water from the Suffolk County Water Authority (SCWA), which draws from the Long Island Sole Source Aquifer System through production wells in the Hauppauge area. Long Island has no surface water supplies — all municipal water comes from the Long Island aquifer system.
The moderately hard 132.5 mg/L hardness and TDS of 293.3 mg/L reflect the Long Island aquifer system's character in the central Suffolk County zone. The Long Island Sole Source Aquifer consists of the Magothy Formation (Cretaceous glauconitic sand — the deep primary aquifer), the Lloyd Sand Member (deeper Cretaceous sand), and the Upper Glacial Aquifer (Pleistocene glacial outwash sand and gravel — the shallow aquifer). The Magothy Formation's Cretaceous marine sand matrix contains trace calcareous cementation, and the Upper Glacial's outwash includes some calcareous New England limestone and dolomite till-derived clasts washed by glacial meltwater. The central Long Island aquifer produces moderately hard water consistent with the SCWA service area's central Suffolk County supply.
At 132.5 mg/L, Hauppauge'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 6.4 ppt warrants a certified drinking water filter — the Hauppauge Industrial Park's extensive manufacturing history (including former electronics, defense, and chemical manufacturing), Grumman's Long Island aerospace manufacturing legacy (a major AFFF user), and Long Island's documented widespread aquifer PFAS contamination from Bethpage Community Park (former Grumman and U.S. Navy facility) all contribute to Hauppauge's PFAS reading.
Geology & Source: Hauppauge in Suffolk County draws from the Suffolk County Water Authority (SCWA) on the Long Island Sole Source Aquifer — the Hauppauge area taps the Magothy Formation (Cretaceous glauconitic sand) and Upper Glacial (Pleistocene glacial outwash) aquifer system — Cretaceous and glacial sand aquifer produces moderately hard water at 132.5 mg/L with TDS 293 mg/L in this Suffolk County New York community.