Sayville Water Hardness & Quality Report (2026)
Water Hardness
9.6 grains per gallon
Source
reservoir
pH Level
8.2
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
418.5 mg/L
Est. Daily Cost
$0.44
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 Sayville, your appliances are currently losing 22% efficiency due to mineral buildup.
| Appliance | In Sayville | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.2 yrs | 8.5 yrs | -51% |
| Washing Machine | 7.5 yrs | 12 yrs | -38% |
| Water Heater | 9 yrs | 15 yrs | -40% |
Regional Water Comparison
How Sayville compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Sayville, New York | 164.5 mg/L | 7.9 ppt | 🟠 Hard | reservoir |
| Patchogue, New York | 138.5 mg/L | 6.6 ppt | 🟠 Hard | reservoir |
| Holbrook, New York | 166.5 mg/L | 8 ppt | 🟠 Hard | reservoir |
| Holtsville, New York | 174.5 mg/L | 8.3 ppt | 🟠 Hard | reservoir |
| East Patchogue, New York | 174.5 mg/L | 8.3 ppt | 🟠 Hard | reservoir |
National Benchmark
How Sayville compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Sayville | 164.5 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
Bring Badger-quality water to your Sayville home
Shop water softeners on Amazon.com →
What Makes Sayville's Water Unique?
Local geology and source profile
Sayville, New York, in Suffolk County — an unincorporated Suffolk County community adjacent to West Islip and Bayport on the south shore of Long Island — receives its municipal water from the Suffolk County Water Authority (SCWA), drawing from the Long Island Aquifer through SCWA well fields in south-central Suffolk County.
The hard 164.5 mg/L hardness and elevated TDS of 418.5 mg/L are consistent with south-central Suffolk County Long Island Aquifer readings. The Long Island Aquifer at south Suffolk is developed in the Pleistocene Upper Glacial Aquifer (glacial outwash quartz sand — primary shallow production zone), the Cretaceous Magothy Formation (the principal deep productive aquifer — quartz sand), and the Cretaceous Lloyd Formation (deep confined aquifer). Long residence time in the quartz-dominated system concentrating minor dissolved minerals produces the elevated hardness and TDS for an ostensibly insoluble geology.
At 164.5 mg/L, Sayville's water is hard — scale builds steadily in kettles and appliances, dishwashers benefit from rinse aid, and water heaters should be descaled annually. Monthly descaling is recommended. The PFAS level of 7.9 ppt warrants a certified drinking water filter — the Long Island PFAS complex (Republic Airport Farmingdale AFFF, Islip MacArthur Airport AFFF, and various Long Island industrial parks in the Sayville-Bayshore SCWA well field service area) contribute to Sayville's elevated readings.
Geology & Source: Sayville in Suffolk County draws from Suffolk County Water Authority on the Long Island Aquifer (south Suffolk County) — the Long Island Aquifer is developed in Pleistocene glacial outwash sand and Cretaceous Magothy Formation (insoluble quartz sand) — New York Suffolk County Long Island Pleistocene glacial-Cretaceous aquifer produces hard water at 164.5 mg/L with TDS 418.5 mg/L in this Suffolk County New York community.