Copiague 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
110.6 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 Copiague, your appliances are currently losing 9% efficiency due to mineral buildup.
| Appliance | In Copiague | 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 Copiague compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Copiague, New York | 70.5 mg/L | 3.5 ppt | 🟡 Moderately Hard | reservoir |
| Lindenhurst, New York | 92.5 mg/L | 4.5 ppt | 🟡 Moderately Hard | reservoir |
| North Amityville, New York | 173.5 mg/L | 8.3 ppt | 🟠 Hard | reservoir |
| East Massapequa, New York | 172.5 mg/L | 8.2 ppt | 🟠 Hard | reservoir |
| Massapequa Park, New York | 168 mg/L | 8 ppt | 🟠 Hard | reservoir |
National Benchmark
How Copiague compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Copiague | 70.5 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Copiague's Water Unique?
Local geology and source profile
Copiague, New York, in Suffolk County on the South Shore of Long Island in Babylon Town — a working-class South Shore hamlet between Amityville and Lindenhurst on the Great South Bay waterfront — receives its municipal water from the Suffolk County Water Authority (SCWA), which draws from the Long Island Glacial Aquifer System through a dense network of production wells across Suffolk County. SCWA serves approximately 1.2 million Long Island residents from the same underlying glacial aquifer system.
The moderately soft 70.5 mg/L hardness and low TDS of 110.6 mg/L reflect Long Island's classic Pleistocene glacial aquifer geology. The Long Island Glacial Aquifer System consists of Upper Glacial Aquifer (Pleistocene glacial outwash sand and gravel deposited by melting Laurentide Ice Sheet lobes), the Magothy Aquifer (deeper Cretaceous marine sands), and the Lloyd Aquifer (deep confined formation). These quartz-dominant glacial and marine sands contain virtually no carbonate minerals, producing the characteristically soft, low-mineral water throughout Long Island's water supply. The Copiague production wells in the SCWA system tap the Upper Glacial Aquifer across the South Shore coastal plain.
At 70.5 mg/L, Copiague's water is moderately soft — comfortable for everyday household use. Scale forms slowly in kettles and appliances over many months, soap lathers well, and the dishwasher produces clean results. Semi-annual descaling of heating appliances is adequate. The PFAS level of 3.5 ppt is among the better readings on Long Island — Copiague's South Shore residential character, away from the historically contaminated airport and industrial zones of Nassau County and central Suffolk, contributes to the lower PFAS profile for this South Shore community.
Geology & Source: Copiague in Suffolk County is served by the Suffolk County Water Authority (SCWA) drawing from the Pleistocene Magothy Aquifer and Upper Glacial Aquifer — Suffolk County's aquifer system consists of Pleistocene glacial outwash sand and gravel over Miocene Magothy Formation marine sands — the glacial outwash aquifer produces moderately soft water at 70.5 mg/L with low TDS of 111 mg/L on Long Island's South Shore.