Colts Neck Water Hardness & Quality Report (2026)
Water Hardness
6.6 grains per gallon
Source
reservoir
pH Level
7.8
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
240 mg/L
Est. Daily Cost
$0.30
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 Colts Neck, your appliances are currently losing 15% efficiency due to mineral buildup.
| Appliance | In Colts Neck | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 5.9 yrs | 8.5 yrs | -31% |
| Washing Machine | 9.4 yrs | 12 yrs | -22% |
| Water Heater | 11.1 yrs | 15 yrs | -26% |
Regional Water Comparison
How Colts Neck compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Colts Neck, New Jersey | 113 mg/L | 9.3 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 |
| Freehold, New Jersey | 48 mg/L | 5.6 ppt | 🟢 Soft | reservoir |
| Middletown, New Jersey | 66 mg/L | 6.7 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How Colts Neck compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Colts Neck | 113 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Colts Neck's Water Unique?
Local geology and source profile
Colts Neck, New Jersey, in Monmouth County — a Monmouth County township adjacent to Freehold and Tinton Falls in central New Jersey — receives its water from New Jersey American Water, drawing from the Cohansey and Manasquan aquifers through the central New Jersey distribution.
The moderately hard 113 mg/L hardness and TDS of 240 mg/L reflect the Monmouth County supply's moderate New Jersey Coastal Plain character — the Eocene Manasquan Formation and Miocene Cohansey Formation are slightly calcareous-sandy insoluble formations in the New Jersey Coastal Plain; the Colts Neck area draws from deeper Coastal Plain aquifer zones with moderate dissolved mineral content (compare Freehold NJ: 109/231 in Monmouth County comparable; Tinton Falls NJ: 116/249 in Monmouth County comparable; Colts Neck consistent moderate from the same Monmouth County Cohansey aquifer Eocene supply). The Monmouth County Coastal Plain aquifer — Eocene Manasquan Formation (slightly calcareous — primary hardness contributor), Miocene Cohansey Formation (sandy insoluble — primary dilutant), and Quaternary Coastal Plain alluvium (slightly calcareous — TDS contributor).
At 113 mg/L with TDS 240, Colts Neck's water is moderately hard — mild scale buildup. Semi-annual descaling is appropriate. The PFAS level of 9.3 ppt warrants a certified drinking water filter. Review New Jersey American Water's annual water quality report.
Geology & Source: Colts Neck in Monmouth County draws from the New Jersey American Water on the Shark River Hills/Cohansey aquifer (Monmouth County, central New Jersey) — the New Jersey Coastal Plain at Monmouth County draws from Eocene Manasquan Formation (slightly calcareous) and Miocene Cohansey Formation (sandy insoluble) — New Jersey Monmouth County Cohansey aquifer Eocene supply produces moderately hard water at 113 mg/L with TDS 240 mg/L.