Lindenhurst Water Hardness & Quality Report (2026)
Water Hardness
2 grains per gallon
Source
groundwater
pH Level
7.6
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
166.4 mg/L
Est. Daily Cost
$0.09
energy & soap waste
Source: See methodology section below · 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 Lindenhurst, your appliances are currently losing 4% efficiency due to mineral buildup.
| Appliance | In Lindenhurst | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 8.5 yrs | 8.5 yrs | — |
| Washing Machine | 12.4 yrs | 12 yrs | — |
| Water Heater | 14.3 yrs | 15 yrs | -5% |
Regional Water Comparison
How Lindenhurst compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Lindenhurst, New York | 33.5 mg/L | 4.5 ppt | 🟢 Soft | groundwater |
| Copiague, New York | ≈ 0–60 mg/L | 3.5 ppt | 🟢 Soft | reservoir |
| North Lindenhurst, New York | ≈ 0–60 mg/L | 3.4 ppt | 🟢 Soft | reservoir |
| West Babylon, New York | ≈ 120–179 mg/L | 6.7 ppt | 🟠 Hard | reservoir |
| Babylon, New York | 145.5 mg/L | 7 ppt | 🟠 Hard | groundwater |
National Benchmark
How Lindenhurst compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Lindenhurst | 33.5 mg/L | 🟢 None |
| USA National Avg | 151 mg/L | 🟠 Moderate |
| Scarsdale Top Rated | 0.02 mg/L | 🟢 None |
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What Makes Lindenhurst's Water Unique?
Local geology and source profile
Lindenhurst, New York is served by the South Farmingdale Water District, which supplies approximately 44,700 residents across western Long Island in Suffolk County. The utility operates multiple groundwater wells drawing from Long Island's extensive aquifer system, with water treatment and distribution infrastructure managed to serve the community's residential and commercial needs. The district provides annual Consumer Confidence Reports detailing comprehensive water quality data, and residents may contact the utility at (631) 698-9500 for detailed testing results and water quality information.
The Lindenhurst water supply originates from Long Island's glacial aquifer complex, primarily the Magothy and Lloyd aquifer formations. These Cretaceous and Pleistocene-age deposits consist of sand, gravel, and clay layers deposited during glacial cycles. The underlying geology naturally contains dissolved minerals — particularly calcium and magnesium carbonates — which contribute to the moderately hard character of the groundwater supply, typical of Long Island's hydrogeological setting.
At moderately hard levels, residents may notice some scale buildup in kettles, coffee makers, and shower heads over time, though the hardness is not severe enough to cause major appliance damage. Water heaters and dishwashers may accumulate minor mineral deposits requiring occasional descaling. A point-of-use filter or whole-house softener may improve water feel and taste, though neither is strictly necessary for health or safety. The utility reports pH around 7.65, zero added fluoride, and lead and copper levels well below action levels, with tap water meeting all EPA Maximum Contaminant Level Goals.
Geology & Source: Long Island glacial aquifer system — Pleistocene sand and gravel deposits overlying Cretaceous clay and sand; Magothy and Lloyd aquifer formations; calcium and magnesium dissolution yields moderately hard supply
Other New York Water Reports
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Frequently Asked Questions
Is Lindenhurst's water safe to drink?
Do I need a water softener in Lindenhurst?
How does Lindenhurst compare to the USA average?
Data Sources & Methodology
Water quality data for Lindenhurst is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.
Water Hardness
Modelled estimate based on state-level USGS geological survey data for this region. No direct USGS Water Quality Portal measurement was matched to this city — the value reflects a statistical range calibrated to the state's dominant rock types and typical source water characteristics.
pH
Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.
TDS — Total Dissolved Solids
Estimated using a derived ratio from water hardness and regional conductance profiles. TDS in natural water correlates strongly with total mineral content including hardness ions.
PFAS — Perfluoroalkyl and Polyfluoroalkyl Substances
EPA UCMR5 (5th Unregulated Contaminant Monitoring Rule, 2023–2025) — sum of PFAS compounds detected at the public water system serving this city. A value of 0 indicates the system was sampled with no detection above reporting limits.
Lead
Modelled estimate based on the EPA Lead and Copper Rule 90th-percentile tap-sample methodology. No publicly available per-city lead dataset with sufficient national coverage exists. Values are a conservative baseline derived from city population tier and infrastructure age — all estimates are maintained below the EPA action level of 0.015 mg/L.
Appliance Lifespan
Calculated from water hardness using a linear degradation model. Baseline lifespans represent soft-water performance (kettle: 8.5 yrs, washing machine: 12.0 yrs, water heater: 15.0 yrs). Hard water mineral scale progressively reduces operational life in direct proportion to hardness concentration.