Mount Vernon Water Hardness & Quality Report (2026)
Water Hardness
7.4 grains per gallon
Source
reservoir
pH Level
7.8
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
271 mg/L
Est. Daily Cost
$0.34
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 Mount Vernon, your appliances are currently losing 17% efficiency due to mineral buildup.
| Appliance | In Mount Vernon | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 5.4 yrs | 8.5 yrs | -36% |
| Washing Machine | 8.9 yrs | 12 yrs | -26% |
| Water Heater | 10.6 yrs | 15 yrs | -29% |
Regional Water Comparison
How Mount Vernon compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Mount Vernon, New York | 126 mg/L | 6.1 ppt | 🟠 Hard | reservoir |
| Wakefield, New York | 114.5 mg/L | 5.5 ppt | 🟡 Moderately Hard | reservoir |
| Baychester, New York | 170.5 mg/L | 8.2 ppt | 🟠 Hard | reservoir |
| Wykagyl, New York | 92.5 mg/L | 4.5 ppt | 🟡 Moderately Hard | reservoir |
| Eastchester, New York | 63.5 mg/L | 3.2 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How Mount Vernon compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Mount Vernon | 126 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
Bring Badger-quality water to your Mount Vernon home
Shop water softeners on Amazon.com →
What Makes Mount Vernon's Water Unique?
Local geology and source profile
Mount Vernon, New York, in Westchester County immediately north of the Bronx boundary — Westchester's most densely populated and most ethnically diverse city — draws its municipal water supply from the New York City DEP Croton Watershed via the Westchester Joint Water Works (WJWW), treating New Croton Reservoir water for Mount Vernon and adjacent Westchester cities including Yonkers. WJWW draws from the New Croton Reservoir aqueduct system in partnership with the NYC DEP. Water hardness in Mount Vernon measures 126 mg/L — classified as moderately hard.
Mount Vernon's moderate hardness reflects the Croton watershed's Westchester County geology and the WJWW distribution characteristics. The New Croton Reservoir watershed drains southern Westchester County's Precambrian crystalline complex — the Fordham Gneiss (Precambrian granitic gneiss), Yonkers Gneiss, and Manhattan Schist (Cambrian–Ordovician mica schist) terrain of southeastern Westchester. These crystalline formations produce relatively soft water. However, the WJWW distribution network in Mount Vernon — serving a densely populated urban city with distribution infrastructure dating to the early 20th century — accumulates some mineral content, raising the finished hardness above the soft Croton Reservoir baseline to the 126 mg/L moderate range.
At 126 mg/L, Mount Vernon residents encounter moderate scale accumulation. Faucet aerators and showerheads develop deposits after several months — monthly cleaning with citric acid solution is practical maintenance. Westchester Joint Water Works consistently delivers water meeting all New York State DOH and EPA Safe Drinking Water Act requirements.
Geology & Source: Reservoir supply from the New York City DEP Croton Aqueduct system via the Westchester Joint Water Works (WJWW) — the Croton watershed Westchester County Precambrian–Paleozoic (Manhattan Schist, Fordham Gneiss, Yonkers Gneiss) crystalline terrain and the New Croton Reservoir distribution; moderately hard supply at 126 mg/L in Westchester County.