Marlboro Water Hardness & Quality Report (2026)
Water Hardness
2.9 grains per gallon
Source
reservoir
pH Level
7.3
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
80.1 mg/L
Est. Daily Cost
$0.13
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 Marlboro, your appliances are currently losing 7% efficiency due to mineral buildup.
| Appliance | In Marlboro | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 8 yrs | 8.5 yrs | -6% |
| Washing Machine | 11.8 yrs | 12 yrs | -2% |
| Water Heater | 13.6 yrs | 15 yrs | -9% |
Regional Water Comparison
How Marlboro compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Marlboro, New Jersey | 49.5 mg/L | 5.7 ppt | 🟢 Soft | reservoir |
| West Freehold, New Jersey | 62 mg/L | 6.4 ppt | 🟡 Moderately Hard | reservoir |
| South Old Bridge, New Jersey | 129 mg/L | 10.2 ppt | 🟠 Hard | reservoir |
| Tinton Falls, New Jersey | 164 mg/L | 12.1 ppt | 🟠 Hard | reservoir |
| Middletown, New Jersey | 66 mg/L | 6.7 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How Marlboro compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Marlboro | 49.5 mg/L | 🟢 None |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Marlboro's Water Unique?
Local geology and source profile
Marlboro, New Jersey, in Monmouth County — a major central Monmouth County suburban community, a large and growing township with significant Jewish-American, Indian-American, and Korean-American communities (one of the highest percentages of Jewish-American population in New Jersey), adjacent to Manalapan and Old Bridge in the rapidly growing Monmouth–Middlesex County suburban corridor, and a diverse central New Jersey community in the Greater New York metro area — draws its municipal water supply from the Wenonah–Mount Laurel Aquifer via the Marlboro Township Water Division and NJ American Water. Water hardness in Marlboro measures 49.5 mg/L — classified as very soft.
Marlboro's very soft supply reflects the central Monmouth County Coastal Plain aquifer's calcareous-poor geology. The Wenonah–Mount Laurel Aquifer in Monmouth County is hosted in: the Cretaceous Wenonah Formation and Mount Laurel Sand (predominantly calcareous-poor quartz-dominated fine to medium sand — one of the most calcareous-poor sandy Coastal Plain aquifer units in New Jersey, lacking the calcareous cemented zones of deeper Coastal Plain aquifers). The NJ American Water treatment of this calcareous-poor sandy aquifer produces the very soft 49.5 mg/L.
With hardness at 49.5 mg/L, Marlboro residents enjoy very soft water with minimal scale challenges. NJ American Water consistently delivers water meeting all New Jersey DEP and EPA Safe Drinking Water Act requirements.
Geology & Source: Groundwater from the Wenonah–Mount Laurel Aquifer and Englishtown Aquifer via the Marlboro Township Water Division and New Jersey American Water — the Monmouth County central New Jersey Coastal Plain (Cretaceous Wenonah Formation and Mount Laurel Sand — calcareous-poor quartz-dominated Coastal Plain sandy aquifer); very soft supply at 49.5 mg/L in Monmouth County.