Dover Water Hardness & Quality Report (2026)
Water Hardness
~120–179 mg/L
Hardestimated · not lab-verified
Source
groundwater
pH Level
7.7
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
373 mg/L
Est. Daily Cost
$0.40
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 Dover, your appliances are currently losing 20% efficiency due to mineral buildup.
| Appliance | In Dover | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.8 yrs | 8.5 yrs | -20% |
| Washing Machine | 9.6 yrs | 12 yrs | -20% |
| Water Heater | 12 yrs | 15 yrs | -20% |
Regional Water Comparison
How Dover compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Dover, New Jersey | ≈ 120–179 mg/L | 123.5 ppt | 🟠 Hard | groundwater |
| Randolph, New Jersey | ≈ 120–179 mg/L | 0 ppt | 🟠 Hard | groundwater |
| Denville, New Jersey | ≈ 120–179 mg/L | 185.7 ppt | 🟠 Hard | groundwater |
| Hopatcong, New Jersey | ≈ 120–179 mg/L | 158.6 ppt | 🟠 Hard | groundwater |
| Morristown, New Jersey | ≈ 120–179 mg/L | 7.5 ppt | 🟠 Hard | groundwater |
National Benchmark
How Dover compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Dover | ≈ 120–179 mg/L | 🟠 Moderate |
| USA National Avg | 151 mg/L | 🟠 Moderate |
| Scarsdale Top Rated | 0.02 mg/L | 🟢 None |
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What Makes Dover's Water Unique?
Local geology and source profile
Dover Water Commission (PWSID# NJ1409001), located at 37 N. Sussex Street and 100 Princeton Avenue, Dover, NJ 07801, serves approximately 28,182 residents in Dover Town, Morris County. Water is sourced exclusively from three groundwater wells at the Princeton Avenue site. No named treatment plants are specified, but standard groundwater treatment — including disinfection and corrosion control — is applied prior to distribution. Annual Consumer Confidence Reports for 2023 and 2024 are available at dover.nj.us; residents may contact the utility at 973-366-2200 or rkinsey@dover.nj.us.
The three wells draw from the Newark Basin aquifers of northern New Jersey, with no surface watershed involved. The basin consists of Triassic Brunswick Formation sandstones, shales, and mudstones, with Jurassic diabase sills that weather to release minerals. As groundwater flows through these carbonate-bearing sediments and mafic intrusions, it leaches calcium and magnesium, creating a hard supply typical of the region's confined aquifers. This mineral-rich geology consistently imparts a moderately mineralised to hard character to the supply.
Hard water from the Newark Basin aquifer causes significant scale buildup in water heaters, dishwashers, washing machines, and showerheads, reducing efficiency and lifespan; boilers and pipes may accumulate deposits increasing energy costs by 20–30%. Regular vinegar descaling, scale-inhibiting showerheads, and annual water heater flushing are recommended. A whole-house water softener is advisable for households experiencing spotting on dishes or dry skin. The 2023 and 2024 CCRs report no violations across over 80 EPA contaminants; past monitoring noted regulated chlorinated byproducts including Chlorodibromoacetic acid, Picloram, and Vinyl chloride.
Geology & Source: Newark Basin — Triassic Brunswick Group sandstones, shales, and mudstones; Jurassic diabase intrusions; confined aquifer wells; carbonate-bearing sediments and mafic rocks dissolve calcium and magnesium — hard groundwater
Other New Jersey Water Reports
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Frequently Asked Questions
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How does Dover compare to the USA average?
Data Sources & Methodology
Water quality data for Dover 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.