Massapequa Park Water Hardness & Quality Report (2026)
Water Hardness
180+ mg/L
Very Hardestimated · not lab-verified
Source
groundwater
pH Level
8.2
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
434.2 mg/L
Est. Daily Cost
$0.91
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 Massapequa Park, your appliances are currently losing 45% efficiency due to mineral buildup.
| Appliance | In Massapequa Park | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.7 yrs | 8.5 yrs | -45% |
| Washing Machine | 6.6 yrs | 12 yrs | -45% |
| Water Heater | 8.3 yrs | 15 yrs | -45% |
Regional Water Comparison
How Massapequa Park compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Massapequa Park, New York | ≈ 180+ mg/L | 0 ppt | 🔴 Very Hard | groundwater |
| Massapequa, New York | ≈ 0–60 mg/L | 0 ppt | 🟢 Soft | groundwater |
| East Massapequa, New York | ≈ 180+ mg/L | 8.2 ppt | 🔴 Very Hard | reservoir |
| North Massapequa, New York | 48 mg/L | 3.4 ppt | 🟢 Soft | reservoir |
| North Amityville, New York | ≈ 180+ mg/L | 8.3 ppt | 🔴 Very Hard | reservoir |
National Benchmark
How Massapequa Park compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Massapequa Park | ≈ 180+ mg/L | 🔴 High |
| USA National Avg | 151 mg/L | 🟠 Moderate |
| Scarsdale Top Rated | 0.02 mg/L | 🟢 None |
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What Makes Massapequa Park's Water Unique?
Local geology and source profile
Massapequa Water District serves Massapequa Park and surrounding areas in Nassau County, New York, primarily drawing groundwater from wells tapping the Magothy Aquifer on Long Island's South Shore. The district operates multiple production wells and a treatment facility at 84 Grand Avenue, Massapequa, NY 11758, providing water to approximately 20,000 residents across a 5.2 square mile service area. There are no surface water sources or reservoirs; all supply comes from local aquifer wells with treatment focused on disinfection, corrosion control, and contaminant removal as needed.
The watershed encompasses local recharge areas of the Upper Glacial and Magothy aquifers, part of the broader Long Island hydrologic system fed by precipitation infiltrating sandy soils. Key geological features include Pleistocene glacial outwash deposits of sands and gravels interbedded with Cretaceous Magothy Formation sands. These formations are known for moderately mineralised groundwater due to prolonged contact with carbonate-rich sediments and limestone fragments, imparting a hard character through natural leaching of calcium and magnesium bicarbonates.
Very hard water leads to significant scale buildup in pipes, water heaters, dishwashers, and washing machines — expect frequent deliming of fixtures and visible spots on glassware. Boilers and coffee makers are especially prone to clogging, increasing energy costs by up to 20–30%. A whole-house water softener is highly recommended; regular quarterly vinegar descaling helps manage deposits. The 2024 Drinking Water Quality Report confirms compliance with all EPA standards across 219+ tested parameters; PFAS are non-detect. pH is maintained around 7.5–8.5 via orthopolyphosphate treatment, with lead and copper below action levels.
Geology & Source: Long Island Magothy Aquifer; Pleistocene glacial outwash sands and gravels interbedded with Upper Cretaceous Magothy Formation; carbonate-influenced sediments dissolve calcium and magnesium bicarbonates, yielding hard water
Other New York Water Reports
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Frequently Asked Questions
Is Massapequa Park's water safe to drink?
Do I need a water softener in Massapequa Park?
How does Massapequa Park compare to the USA average?
Data Sources & Methodology
Water quality data for Massapequa Park 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.