Hopatcong Hills Water Hardness & Quality Report (2026)
Water Hardness
6.3 grains per gallon
Source
reservoir
pH Level
7.7
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
222.2 mg/L
Est. Daily Cost
$0.29
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 Hopatcong Hills, your appliances are currently losing 14% efficiency due to mineral buildup.
| Appliance | In Hopatcong Hills | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.1 yrs | 8.5 yrs | -28% |
| Washing Machine | 9.6 yrs | 12 yrs | -20% |
| Water Heater | 11.3 yrs | 15 yrs | -25% |
Regional Water Comparison
How Hopatcong Hills compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Hopatcong Hills, New Jersey | 107 mg/L | 8.9 ppt | 🟡 Moderately Hard | reservoir |
| Hopatcong, New Jersey | 106.5 mg/L | 8.9 ppt | 🟡 Moderately Hard | reservoir |
| Sparta, New Jersey | 132 mg/L | 10.3 ppt | 🟠 Hard | reservoir |
| Dover, New Jersey | 142 mg/L | 10.9 ppt | 🟠 Hard | reservoir |
| Randolph, New Jersey | 115 mg/L | 9.4 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How Hopatcong Hills compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Hopatcong Hills | 107 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
Bring Badger-quality water to your Hopatcong Hills home
Shop water softeners on Amazon.com →
What Makes Hopatcong Hills's Water Unique?
Local geology and source profile
Hopatcong Hills, New Jersey, in Sussex County — a Sussex County community adjacent to Lake Hopatcong and Jefferson in the northwest New Jersey Highland lakes district — receives its municipal water from New Jersey American Water or the Lake Hopatcong Water District, drawing from Lake Hopatcong (Sussex-Morris County line) through the northwest New Jersey distribution system.
The moderately hard 107 mg/L hardness and TDS of 222.2 mg/L reflect the northwest New Jersey Highland watershed's moderate calcareous character. Lake Hopatcong drains the New Jersey Highlands — Precambrian Franklin Marble (moderately calcareous metamorphic carbonate), Cambrian Kittatinny Limestone (calcareous), and Precambrian Losee Tonalite Gneiss (insoluble). The mixed calcareous Highland carbonates and insoluble gneiss produces the moderately hard northwest New Jersey supply.
At 107 mg/L, Hopatcong Hills' water is moderately hard — scale builds in kettles and appliances over months, dishwashers benefit from rinse aid, and faucet aerators need periodic cleaning. Quarterly descaling is appropriate. The PFAS level of 8.9 ppt warrants a certified reverse osmosis drinking water filter — Picatinny Arsenal (Morris County — AFFF, the dominant northwest New Jersey military PFAS source, directly in the Lake Hopatcong watershed), and the New Jersey Highlands PFAS complex contribute to Hopatcong Hills' elevated readings.
Geology & Source: Hopatcong Hills in Sussex County draws from New Jersey American Water on Lake Hopatcong (Sussex County, northwest New Jersey) — Lake Hopatcong drains the New Jersey Highlands (Precambrian Franklin Marble, Cambrian Kittatinny Limestone — moderately calcareous) — New Jersey Sussex County Lake Hopatcong Highland calcareous watershed produces moderately hard water at 107 mg/L with TDS 222.2 mg/L in this Sussex County New Jersey community.