Manorville Water Hardness & Quality Report (2026)
Water Hardness
8.9 grains per gallon
Source
reservoir
pH Level
8.1
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
366.7 mg/L
Est. Daily Cost
$0.41
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 Manorville, your appliances are currently losing 20% efficiency due to mineral buildup.
| Appliance | In Manorville | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.6 yrs | 8.5 yrs | -46% |
| Washing Machine | 8 yrs | 12 yrs | -33% |
| Water Heater | 9.5 yrs | 15 yrs | -37% |
Regional Water Comparison
How Manorville compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Manorville, New York | 152 mg/L | 7.3 ppt | 🟠 Hard | reservoir |
| Mastic, New York | 169.5 mg/L | 8.1 ppt | 🟠 Hard | reservoir |
| Ridge, New York | 164.5 mg/L | 7.8 ppt | 🟠 Hard | reservoir |
| Shirley, New York | 121 mg/L | 5.8 ppt | 🟠 Hard | reservoir |
| Mastic Beach, New York | 169.5 mg/L | 8.1 ppt | 🟠 Hard | reservoir |
National Benchmark
How Manorville compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Manorville | 152 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Manorville's Water Unique?
Local geology and source profile
Manorville, New York, in Suffolk County — a Suffolk County hamlet adjacent to Riverhead and Shirley in central Long Island — receives its water from the Suffolk County Water Authority (SCWA), drawing from the Long Island Aquifer (Suffolk County) through the central Long Island distribution.
The moderately hard 152 mg/L hardness and TDS of 366.7 mg/L reflect the central Suffolk County Long Island Aquifer's moderately hard character — consistent with other SCWA central Long Island communities (East Islip: 171 mg/L; Mastic Beach: ~169 mg/L). The Long Island Aquifer at Suffolk County is developed in Pleistocene glacial outwash (slightly calcareous), Cretaceous Magothy Aquifer (slightly calcareous — primary hardness contributor at the central Suffolk depth), and Cretaceous Lloyd Sand (insoluble).
At 152 mg/L, Manorville's water is moderately hard — scale builds in kettles and appliances over months, dishwashers benefit from rinse aid, and faucet aerators need periodic cleaning. Quarterly descaling is appropriate. The PFAS level of 7.3 ppt warrants a certified drinking water filter — Calverton Naval Weapons Industrial Reserve Plant (Suffolk County — AFFF legacy) and the central Long Island Suffolk County industrial corridor contribute to Manorville's readings.
Geology & Source: Manorville in Suffolk County draws from the Suffolk County Water Authority on the Long Island Aquifer (Suffolk County, central Long Island) — the Long Island Aquifer at Suffolk County is developed in Pleistocene glacial outwash and Cretaceous Magothy Aquifer (slightly calcareous) — New York Suffolk County Long Island Pleistocene-Cretaceous sandy aquifer produces moderately hard water at 152 mg/L with TDS 366.7 mg/L.