Robertsville Water Hardness & Quality Report (2026)
Water Hardness
2.6 grains per gallon
Source
reservoir
pH Level
7.3
neutral = 7.0
Lead
0.001 mg/L
✓ Below action level
TDS
69.3 mg/L
Est. Daily Cost
$0.12
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 Robertsville, your appliances are currently losing 6% efficiency due to mineral buildup.
| Appliance | In Robertsville | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 8.1 yrs | 8.5 yrs | -5% |
| Washing Machine | 12 yrs | 12 yrs | — |
| Water Heater | 13.8 yrs | 15 yrs | -8% |
Regional Water Comparison
How Robertsville compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Robertsville, New Jersey | 44 mg/L | 5.4 ppt | 🟢 Soft | reservoir |
| Marlboro, New Jersey | 49.5 mg/L | 5.7 ppt | 🟢 Soft | reservoir |
| Freehold, New Jersey | 48 mg/L | 5.6 ppt | 🟢 Soft | reservoir |
| South Old Bridge, New Jersey | 129 mg/L | 10.2 ppt | 🟠 Hard | reservoir |
| Old Bridge, New Jersey | 124 mg/L | 9.9 ppt | 🟠 Hard | reservoir |
National Benchmark
How Robertsville compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Robertsville | 44 mg/L | 🟢 None |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
Bring Badger-quality water to your Robertsville home
Shop water softeners on Amazon.com →
What Makes Robertsville's Water Unique?
Local geology and source profile
Robertsville, New Jersey, in Monmouth County — a Monmouth County unincorporated community adjacent to Freehold and Morganville in central New Jersey — receives its water from New Jersey American Water, drawing from the Kirkwood-Cohansey Aquifer through the central New Jersey distribution.
The soft 44 mg/L hardness and low TDS of 69.3 mg/L reflect the Monmouth County Pinelands Aquifer supply's soft character — the Cretaceous Kirkwood Formation and Cohansey Sand are both highly insoluble quartz sand and gravel formations in the New Jersey Pine Barrens, contributing minimal dissolved minerals to the central New Jersey groundwater (compare Freehold NJ: 42/65 in Monmouth County comparable; Morganville NJ: 45/73 in Monmouth County comparable; Robertsville consistent soft from the same Monmouth County Pinelands Aquifer Cretaceous insoluble supply). The Kirkwood-Cohansey Aquifer — Cretaceous Kirkwood Formation (insoluble — primary dilutant), Cretaceous Cohansey Sand (insoluble — secondary dilutant), and Quaternary Pine Barrens sediment (insoluble — minimal TDS).
At 44 mg/L with TDS 69, Robertsville's water is soft — minimal scale buildup. Soft water can be corrosive — check for blue-green copper staining in older plumbing. The PFAS level of 5.4 ppt warrants a certified drinking water filter given the Monmouth County New Jersey military (Fort Monmouth legacy) sources. Review New Jersey American Water's annual water quality report.
Geology & Source: Robertsville in Monmouth County draws from the New Jersey American Water on the Pinelands Aquifer (Monmouth County, central New Jersey) — the Monmouth County Coastal Plain draws from Cretaceous Kirkwood Formation (insoluble) and Cretaceous Cohansey Sand (insoluble) — New Jersey Monmouth County Pinelands Aquifer Cretaceous insoluble supply produces soft water at 44 mg/L with TDS 69.3 mg/L.