Middletown Water Hardness & Quality Report (2026)
Water Hardness
3.9 grains per gallon
Source
reservoir
pH Level
7.4
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
115.5 mg/L
Est. Daily Cost
$0.18
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 Middletown, your appliances are currently losing 9% efficiency due to mineral buildup.
| Appliance | In Middletown | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.4 yrs | 8.5 yrs | -13% |
| Washing Machine | 11.2 yrs | 12 yrs | -7% |
| Water Heater | 13 yrs | 15 yrs | -13% |
Regional Water Comparison
How Middletown compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Middletown, New Jersey | 66 mg/L | 6.7 ppt | 🟡 Moderately Hard | reservoir |
| Tinton Falls, New Jersey | 164 mg/L | 12.1 ppt | 🟠 Hard | reservoir |
| Marlboro, New Jersey | 49.5 mg/L | 5.7 ppt | 🟢 Soft | reservoir |
| Long Branch, New Jersey | 184 mg/L | 13.3 ppt | 🔴 Very Hard | reservoir |
| Great Kills, New York | 86.5 mg/L | 4.2 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How Middletown compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Middletown | 66 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Middletown's Water Unique?
Local geology and source profile
Middletown Township, New Jersey, in Monmouth County on Sandy Hook Bay (Raritan Bay) — New Jersey's largest township by population and a major New York Metro suburban community on the Bayshore — draws its municipal water supply from Coastal Plain groundwater wells accessing the Navesink Aquifer (Cretaceous Navesink Formation and Red Bank Formation) and the Shark River Aquifer (Paleocene Manasquan Formation) via New Jersey American Water and the Middletown Township Municipal Utilities Authority, serving Monmouth County. Water hardness in Middletown measures 66 mg/L — classified as moderately soft.
Middletown's soft supply reflects the Monmouth County New Jersey Coastal Plain aquifer system's lower calcareous reactivity. The Navesink Formation (Cretaceous — calcareous glauconitic greensand marl) and Red Bank Formation (Cretaceous sandy glauconite) in Monmouth County are relatively low-carbonate formations compared to the highly calcareous Eocene Kirkwood and Cape May formations of southern New Jersey. The Monmouth County Coastal Plain aquifers are in the updip, thin, landward zone where the Cretaceous formations contain less calcareous material and more siliceous glauconite. The resulting 66 mg/L is consistent with the moderately soft Monmouth County groundwater, similar to other northern New Jersey Coastal Plain communities.
With hardness at 66 mg/L, Middletown residents enjoy moderately soft water with minimal scale challenges. New Jersey American Water and Middletown Township Municipal Utilities Authority consistently deliver water meeting all New Jersey DEP and EPA Safe Drinking Water Act requirements.
Geology & Source: Groundwater from the Navesink Aquifer and Shark River Aquifer (Cretaceous–Paleocene coastal plain formations) via the Township of Middletown Utilities Water Division and New Jersey American Water — the Monmouth County New Jersey Coastal Plain (Cretaceous Navesink Formation, Red Bank Formation, and Paleocene Vincentown Formation calcareous glauconitic sand); moderately soft supply at 66 mg/L in Monmouth County.