Jericho Water Hardness & Quality Report (2026)
Water Hardness
7.3 grains per gallon
Source
reservoir
pH Level
7.8
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
265.7 mg/L
Est. Daily Cost
$0.33
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 Jericho, your appliances are currently losing 17% efficiency due to mineral buildup.
| Appliance | In Jericho | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 5.5 yrs | 8.5 yrs | -35% |
| Washing Machine | 9 yrs | 12 yrs | -25% |
| Water Heater | 10.6 yrs | 15 yrs | -29% |
Regional Water Comparison
How Jericho compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Jericho, New York | 124.5 mg/L | 6 ppt | 🟠 Hard | reservoir |
| Hicksville, New York | 151.5 mg/L | 7.3 ppt | 🟠 Hard | reservoir |
| New Cassel, New York | 155 mg/L | 7.4 ppt | 🟠 Hard | reservoir |
| Syosset, New York | 111.5 mg/L | 5.4 ppt | 🟡 Moderately Hard | reservoir |
| Westbury, New York | 158.5 mg/L | 7.6 ppt | 🟠 Hard | reservoir |
National Benchmark
How Jericho compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Jericho | 124.5 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Jericho's Water Unique?
Local geology and source profile
Jericho, New York, in Nassau County — a Nassau County hamlet adjacent to Syosset and Westbury in central Long Island — receives its water from the Nassau County Department of Public Works or New York American Water, drawing from the Long Island Glacial Aquifer (Nassau County) through the central Long Island distribution.
The moderately hard 124.5 mg/L hardness and TDS of 265.7 mg/L reflect the central Nassau County Long Island supply's moderate calcareous character — harder than the north shore Suffolk communities (Hampton Bays: 118.5 mg/L; Stony Brook: 87.5 mg/L) but typical of the Nassau County central Long Island position on the Ronkonkoma moraine-influenced zone. The Long Island Glacial Aquifer at Nassau County (Jericho) — Pleistocene Ronkonkoma Moraine (calcareous — primary hardness contributor), Cretaceous Magothy Formation (insoluble — dilutant), and Cretaceous Lloyd Sand (insoluble — deep dilutant).
At 124.5 mg/L, Jericho'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 6.0 ppt warrants a certified drinking water filter — the Nassau County central Long Island industrial corridor and Grumman/Northrop legacy sites (Nassau County) contribute to Jericho's readings.
Geology & Source: Jericho in Nassau County draws from the Nassau County Department of Public Works on the Long Island Glacial Aquifer (Nassau County, central Long Island, New York) — the aquifer is developed in Pleistocene Ronkonkoma moraine till (slightly calcareous) and Cretaceous Magothy Formation (insoluble) — New York Nassau County Long Island Pleistocene glacial aquifer produces moderately hard water at 124.5 mg/L with TDS 265.7 mg/L.