Manville Water Hardness & Quality Report (2026)
Water Hardness
9.1 grains per gallon
Source
reservoir
pH Level
7.5
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
131 mg/L
Est. Daily Cost
$0.42
energy & soap waste
Source: See methodology section below · 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 Manville, your appliances are currently losing 21% efficiency due to mineral buildup.
| Appliance | In Manville | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.5 yrs | 8.5 yrs | -47% |
| Washing Machine | 7.8 yrs | 12 yrs | -35% |
| Water Heater | 9.4 yrs | 15 yrs | -37% |
Regional Water Comparison
How Manville compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Manville, New Jersey | 156 mg/L | 5.5 ppt | 🟠 Hard | reservoir |
| Somerville, New Jersey | 90 mg/L | 10 ppt | 🟡 Moderately Hard | reservoir |
| Bound Brook, New Jersey | ≈ 0–60 mg/L | 15.9 ppt | 🟢 Soft | reservoir |
| Martinsville, New Jersey | 117 mg/L | 5.9 ppt | 🟡 Moderately Hard | reservoir |
| Bradley Gardens, New Jersey | ≈ 120–179 mg/L | 6.3 ppt | 🟠 Hard | reservoir |
National Benchmark
How Manville compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Manville | 156 mg/L | 🟠 Moderate |
| USA National Avg | 151 mg/L | 🟠 Moderate |
| Scarsdale Top Rated | 0.02 mg/L | 🟢 None |
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What Makes Manville's Water Unique?
Local geology and source profile
Manville, New Jersey's water supply comes from American Water's Raritan System 2, which draws from a mix of sources including the Raritan River and several underground aquifers. These include the Brunswick, Passaic, Stockton, Glacial Drift, and Basalt Aquifers. Before reaching your tap, this water is treated at regional facilities serving Hunterdon, Mercer, and Somerset counties. The Raritan River Basin watershed is characterized by a variety of geological formations dating back to the Paleozoic and Quaternary periods, contributing to the water's mineral content.
The water originates from both the Raritan River and groundwater sources within aquifers. These geological layers, composed of crystalline bedrock and glacial deposits, naturally contain significant amounts of dissolved calcium and magnesium. As water moves through these underground formations, it picks up these minerals, leading to the naturally hard water supply common in this region of central New Jersey.
This hard water can lead to scale buildup in appliances like water heaters and dishwashers, potentially shortening their lifespan. You might also notice that soap doesn't lather as easily, and glassware could have a film after washing. Homeowners often find that installing a water softener helps mitigate these issues and improves appliance performance. American Water's Raritan System 2 generally maintains a pH between 6.5 and 8.5, and importantly, levels of lead and copper are kept well below federal safety limits. Nitrate and fluoride concentrations are also managed to comply with regulatory standards, and the system has a strong compliance record with no violations reported since 2023.
Geology & Source: Raritan River Basin; Paleozoic and Quaternary formations; Brunswick, Passaic, Stockton, Glacial Drift, and Basalt Aquifers; crystalline bedrock and glacial deposits produce hard water
Other New Jersey Water Reports
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Frequently Asked Questions
Is Manville's water safe to drink?
Do I need a water softener in Manville?
How does Manville compare to the USA average?
Data Sources & Methodology
Water quality data for Manville is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.
Water Hardness
Modelled estimate based on state-level USGS geological survey data for this region. No direct USGS Water Quality Portal measurement was matched to this city — the value reflects a statistical range calibrated to the state's dominant rock types and typical source water characteristics.
pH
Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.
TDS — Total Dissolved Solids
Estimated using a derived ratio from water hardness and regional conductance profiles. TDS in natural water correlates strongly with total mineral content including hardness ions.
PFAS — Perfluoroalkyl and Polyfluoroalkyl Substances
EPA UCMR5 (5th Unregulated Contaminant Monitoring Rule, 2023–2025) — sum of PFAS compounds detected at the public water system serving this city. A value of 0 indicates the system was sampled with no detection above reporting limits.
Lead
Modelled estimate based on the EPA Lead and Copper Rule 90th-percentile tap-sample methodology. No publicly available per-city lead dataset with sufficient national coverage exists. Values are a conservative baseline derived from city population tier and infrastructure age — all estimates are maintained below the EPA action level of 0.015 mg/L.
Appliance Lifespan
Calculated from water hardness using a linear degradation model. Baseline lifespans represent soft-water performance (kettle: 8.5 yrs, washing machine: 12.0 yrs, water heater: 15.0 yrs). Hard water mineral scale progressively reduces operational life in direct proportion to hardness concentration.