Water hardness in North Arlington
6.3 gpg moderately hard
Tap water in North Arlington is moderately hard: 6.3 gpg (108 mg/L · 6.1 °dH · 10.8 °fH).
Source: PVWC North Arlington 2025 Water Quality Report (CCR 2026) (2025) · data checked 2026-10-29
Range across supply zones: 42–242 mg/L.
2 supply zones — hardness varies by neighbourhood; the figure above is the median.
Hardness by district / supply zone
| gpg | mg/L | ||
|---|---|---|---|
| NJDWSC Wanaque WTP (purchased, blended) | 2.5 | 42 | soft |
| PVWC Little Falls WTP (majority of supply, blended) | 10.2 | 174 | hard |
North Arlington is served by the Passaic Valley Water Commission, which reports 108 mg/L as CaCO3 here, in the moderate band. The service area has two zones, and the 2025 report shows values from 42 to 242 mg/L, so hardness at your tap depends on which zone feeds your street. Check the utility's report for your address before sizing a softener.
USGS classes: soft 0–60, moderately hard 61–120, hard 121–180, very hard >180 mg/L.
Water data
| Total hardness | 6.3 gpg |
|---|---|
| Utility | Passaic Valley Water Commission (North Arlington Service Area) |
How North Arlington compares
- Tap water in North Arlington is 30 % softer than the median of the 1372 cities we track in the United States (9.1 gpg).
- By hardness it ranks 974 of 1372 in the United States (1 = hardest); 29 % of these cities have softer water.
- In New Jersey it is number 21 of 34 cities; the regional median is 6.4 gpg.
Ranking of the hardest and softest water in the United States →
What it means at home
- Visible kettle scale every few weeks; vinegar or citric acid is enough.
- Water heater and washing machine: some long-term scale; a scale inhibitor slows it.
- Dishwasher: medium salt setting.
- Softener optional; pays off mainly with a gas boiler or tankless heater.
How much salt will you use for softening?
Optional. A scale inhibitor or a small softener protects the heater; soap savings are modest.
Descale a coffee machine or kettle about every 3 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in North Arlington
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 6 °dH |
| AEG / Electrolux | 2 |
| Beko | 2nd |
| Hoover | S1 |
| LG | H1 |
From each brand's manual for the model family named in the source; your model may differ, so check its manual. All brands and how to change the setting →
FAQ
Is North Arlington water hard or soft?
It is moderately hard: 108 mg/L as CaCO₃ (6.3 gpg, 6.1 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in North Arlington safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. USGS classes: soft 0–60, moderately hard 61–120, hard 121–180, very hard >180 mg/L.
How many grains per gallon is North Arlington water?
6.3 gpg, equal to 6.1 °dH, 10.8 °fH or 108 mg/L calcium carbonate.
What dishwasher salt setting should I use in North Arlington?
For 108 mg/L (6.1 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in North Arlington?
Not essential; a scale inhibitor protects the heater cheaply.
Source
Source: PVWC North Arlington 2025 Water Quality Report (CCR 2026) (2025). Method: figure published by the water supplier. PVWC North Arlington 2025 Water Quality Report (CCR 2026) · Outdated figure? Tell us