Port Washington Water Hardness & Quality Report (2026)
Water Hardness
4.8 grains per gallon
Source
reservoir
pH Level
7.5
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
141.2 mg/L
Est. Daily Cost
$0.22
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 Port Washington, your appliances are currently losing 11% efficiency due to mineral buildup.
| Appliance | In Port Washington | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.9 yrs | 8.5 yrs | -19% |
| Washing Machine | 10.5 yrs | 12 yrs | -13% |
| Water Heater | 12.3 yrs | 15 yrs | -18% |
Regional Water Comparison
How Port Washington compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Port Washington, New York | 83 mg/L | 4.1 ppt | 🟡 Moderately Hard | reservoir |
| Glen Cove, New York | 176 mg/L | 8.4 ppt | 🟠 Hard | reservoir |
| Douglaston, New York | 140.5 mg/L | 6.8 ppt | 🟠 Hard | reservoir |
| North New Hyde Park, New York | 69.5 mg/L | 3.4 ppt | 🟡 Moderately Hard | reservoir |
| Mineola, New York | 95 mg/L | 4.6 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How Port Washington compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Port Washington | 83 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
Bring Badger-quality water to your Port Washington home
Shop water softeners on Amazon.com →
What Makes Port Washington's Water Unique?
Local geology and source profile
Port Washington, New York, in Nassau County — a Nassau County village adjacent to Manhasset and Great Neck on Manhasset Bay (Long Island Sound) in north Nassau County — receives its municipal water from New York City DEP or a local Port Washington Water District, drawing from the NYC Catskill-Delaware system delivered to north Nassau County.
The moderately soft 83 mg/L hardness and TDS of 141.2 mg/L are consistent with the NYCDEP-served north Nassau communities (Roosevelt: 70 mg/L; Bellmore: 78.5 mg/L) — softer than the Long Island Aquifer-supplied Floral Park (123 mg/L) and confirming Port Washington receives NYC treated surface water. NYC water from the Catskill-Delaware system drains the Catskill Mountains — Devonian Catskill Formation red sandstone (insoluble), producing the soft west-north Nassau coastal supply.
At 83 mg/L, Port Washington's water is moderately soft — light scale forms slowly in appliances, dishwashers remain efficient, and bathroom fixtures need occasional cleaning. Semi-annual descaling is appropriate. The PFAS level of 4.1 ppt warrants a certified drinking water filter — the NYCDEP Catskill-Delaware system carries minimal PFAS, and north Nassau County's Long Island Sound shoreline has limited major AFFF industrial point sources.
Geology & Source: Port Washington in Nassau County draws from New York City DEP on the Catskill-Delaware and Croton watersheds (Nassau County, north Long Island) — the Catskill-Delaware drains the Catskill Mountains (Devonian Catskill Formation sandstone — insoluble) — New York Nassau County NYCDEP Catskill-Delaware watershed produces moderately soft water at 83 mg/L with TDS 141.2 mg/L in this Nassau County New York village.