North Merrick Water Hardness & Quality Report (2026)
Water Hardness
4.1 grains per gallon
Source
reservoir
pH Level
7.4
neutral = 7.0
Lead
0.001 mg/L
✓ Below action level
TDS
108.3 mg/L
Est. Daily Cost
$0.19
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 North Merrick, your appliances are currently losing 9% efficiency due to mineral buildup.
| Appliance | In North Merrick | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.3 yrs | 8.5 yrs | -14% |
| Washing Machine | 11 yrs | 12 yrs | -8% |
| Water Heater | 12.8 yrs | 15 yrs | -15% |
Regional Water Comparison
How North Merrick compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ North Merrick, New York | 69.5 mg/L | 3.4 ppt | 🟡 Moderately Hard | reservoir |
| East Meadow, New York | 172.5 mg/L | 8.2 ppt | 🟠 Hard | reservoir |
| Roosevelt, New York | 70 mg/L | 3.5 ppt | 🟡 Moderately Hard | reservoir |
| North Bellmore, New York | 174 mg/L | 8.3 ppt | 🟠 Hard | reservoir |
| Merrick, New York | 72.5 mg/L | 3.6 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How North Merrick compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ North Merrick | 69.5 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
Bring Badger-quality water to your North Merrick home
Shop water softeners on Amazon.com →
What Makes North Merrick's Water Unique?
Local geology and source profile
North Merrick, New York, in Nassau County — a Nassau County hamlet adjacent to Merrick and Bellmore on the south shore of Long Island — receives its water from the Nassau County Water Authority, drawing from the Long Island aquifer (Nassau County) through the south-central Long Island distribution.
The soft 69.5 mg/L hardness and low TDS of 108.3 mg/L reflect the south-central Long Island Nassau County Magothy aquifer supply's soft character — the Pleistocene Magothy Aquifer and Cretaceous Lloyd Aquifer insoluble produce soft water, softer than the Suffolk County south shore (Patchogue NY: 138.5/314.5) because Nassau County's shallower Magothy formation contacts less calcareous material. The Long Island aquifer at Nassau County — Pleistocene Magothy Aquifer (insoluble — primary dilutant), Cretaceous Lloyd Aquifer (insoluble — secondary dilutant), and Quaternary Long Island drift (slightly calcareous — minor hardness contributor).
At 69.5 mg/L, North Merrick's water is soft — scale forms slowly in appliances, dishwashers remain efficient, and no softening is needed. Annual descaling is appropriate. The PFAS level of 3.4 ppt warrants a certified drinking water filter — the Nassau County Long Island industrial corridor contribute to North Merrick's readings.
Geology & Source: North Merrick in Nassau County is served by Nassau County Water Authority drawing from the Long Island aquifer — the Nassau County supply drains Pleistocene Magothy Aquifer (insoluble) and Cretaceous Lloyd Aquifer (insoluble) — NY Nassau County Long Island Magothy Pleistocene insoluble supply produces soft water at 69.5 mg/L with TDS 108.3 mg/L.