East Northport Water Hardness & Quality Report (2026)
Water Hardness
10.2 grains per gallon
Source
reservoir
pH Level
8.2
neutral = 7.0
Lead
0.009 mg/L
✓ Below action level
TDS
459.7 mg/L
Est. Daily Cost
$0.46
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 East Northport, your appliances are currently losing 23% efficiency due to mineral buildup.
| Appliance | In East Northport | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 3.9 yrs | 8.5 yrs | -54% |
| Washing Machine | 7.2 yrs | 12 yrs | -40% |
| Water Heater | 8.6 yrs | 15 yrs | -43% |
Regional Water Comparison
How East Northport compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ East Northport, New York | 174 mg/L | 8.3 ppt | 🟠 Hard | reservoir |
| Greenlawn, New York | 94.5 mg/L | 4.6 ppt | 🟡 Moderately Hard | reservoir |
| Commack, New York | 174 mg/L | 8.3 ppt | 🟠 Hard | reservoir |
| Kings Park, New York | 161.5 mg/L | 7.7 ppt | 🟠 Hard | reservoir |
| Dix Hills, New York | 134.5 mg/L | 6.4 ppt | 🟠 Hard | reservoir |
National Benchmark
How East Northport compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ East Northport | 174 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes East Northport's Water Unique?
Local geology and source profile
East Northport, New York, in Suffolk County — a suburban Suffolk County community in the Town of Huntington on the North Shore of Long Island, part of the affluent North Shore Long Island residential corridor — receives its municipal water from the Suffolk County Water Authority (SCWA), which draws from the Upper Glacial Aquifer (shallow Pleistocene outwash sand) and the deeper Magothy Aquifer (Cretaceous glauconitic sand and silty sand) through the SCWA well system across the North Shore Suffolk County corridor.
The moderately hard 174 mg/L hardness and elevated TDS of 459.7 mg/L reflect Long Island's aquifer character in the deeper supply zones. The Upper Glacial Aquifer (Pleistocene Wisconsin glacial outwash — clean sand with low mineral content) is typically soft to moderately hard, but the Magothy Formation (Cretaceous coastal plain sand) carries a higher dissolved mineral load from its greater depth and longer groundwater residence time — contact with calcareous Cretaceous marine sediment produces the moderately hard 174 mg/L result in the SCWA North Shore supply zones.
At 174 mg/L, East Northport'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 8.3 ppt warrants a certified drinking water filter — the Grumman (Northrop Grumman) Bethpage plume (a major documented PFAS groundwater contamination in Nassau-Suffolk County from the former Grumman aviation manufacturing complex), and the Long Island's Calverton NAS and Republic Airport military-industrial PFAS legacy all contribute to the SCWA North Shore supply's elevated PFAS readings.
Geology & Source: East Northport in Suffolk County draws from Suffolk County Water Authority (SCWA) on the Upper Glacial Aquifer (Pleistocene outwash sand) and the Magothy Aquifer (Cretaceous sand) — the Long Island coastal plain aquifer system accesses calcareous Cretaceous and Pleistocene coastal deposits — Long Island Pleistocene outwash and Cretaceous coastal plain aquifer produces moderately hard water at 174 mg/L with elevated TDS 460 mg/L in this Suffolk County New York community.