Kings Park Water Hardness & Quality Report (2026)
Water Hardness
2.1 grains per gallon
Source
groundwater
pH Level
8.1
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
406.1 mg/L
Est. Daily Cost
$0.10
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 Kings Park, your appliances are currently losing 5% efficiency due to mineral buildup.
| Appliance | In Kings Park | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 8.4 yrs | 8.5 yrs | -1% |
| Washing Machine | 12.3 yrs | 12 yrs | — |
| Water Heater | 14.2 yrs | 15 yrs | -5% |
Regional Water Comparison
How Kings Park compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Kings Park, New York | 36 mg/L | 0 ppt | 🟢 Soft | groundwater |
| Fort Salonga, New York | ≈ 120–179 mg/L | 6.5 ppt | 🟠 Hard | reservoir |
| Commack, New York | ≈ 120–179 mg/L | 8.3 ppt | 🟠 Hard | reservoir |
| Smithtown, New York | 48 mg/L | 6.9 ppt | 🟢 Soft | reservoir |
| East Northport, New York | ≈ 120–179 mg/L | 8.3 ppt | 🟠 Hard | reservoir |
National Benchmark
How Kings Park compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Kings Park | 36 mg/L | 🟢 None |
| USA National Avg | 151 mg/L | 🟠 Moderate |
| Scarsdale Top Rated | 0.02 mg/L | 🟢 None |
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What Makes Kings Park's Water Unique?
Local geology and source profile
The Smithtown Water District serves approximately 19,635 people in Kings Park and surrounding areas within the Town of Smithtown, Suffolk County, New York. The utility draws its entire supply from groundwater aquifers on Long Island, with no named reservoirs, rivers, or specific treatment plants detailed in available reports. Water is extracted via wells tapping local glacial and coastal plain aquifers, treated through standard processes including disinfection, and distributed to the service area without major surface water infrastructure.
The supply originates from the Long Island groundwater system, encompassing the Upper Glacial and Magothy aquifers amid Pleistocene glacial deposits and Cretaceous sands. These formations consist of unconsolidated quartz sands and gravels with low carbonate content, producing soft water with minimal dissolved minerals. The geology creates a low-mineralized profile due to rapid recharge through sandy soils and limited rock-water interaction in non-karstic settings, preserving the soft character reflective of the region's glacial history.
Soft water produces ample lather with minimal soap and poses little risk of scale buildup in appliances like kettles, dishwashers, or water heaters. Fixtures and pipes experience negligible deposits, reducing maintenance needs. No water softener is recommended; instead, monitor for potential corrosion risks from low mineral buffering. The 2024 Consumer Confidence Report confirms compliance with all EPA MCLs and MCLGs, with lead at 2.7 ppb and copper at 0.23 ppm — both well below action levels. Third-party assessments note potential concerns with PFAS and chromium-6, though no violations were reported and filtration is advised for extra caution.
Geology & Source: Long Island Upper Glacial and Magothy aquifers; Pleistocene glacial sands and gravels overlying Cretaceous formations; quartz-rich glacial till with minimal limestone or dolomite yields characteristically soft water
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Frequently Asked Questions
Is Kings Park's water safe to drink?
Do I need a water softener in Kings Park?
How does Kings Park compare to the USA average?
Data Sources & Methodology
Water quality data for Kings 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.