Hard water in Pine Brook, NJ
Reported by Montville TWP MUA · September 2025
- NJ typical
- 80 mg/L
- EPA health violations since 2016
- 3
- Softener for 3 people
- 24k grain
- Data
- Utility report
The water in Pine Brook carries roughly 180 mg/L of dissolved calcium and magnesium, or 10.5 grains per gallon. That is hard water. The number comes from Montville TWP MUA, dated September 2025.
At 180 mg/L, Pine Brook is 100 mg/L above the typical New Jersey figure of 80. Of the 10 nearest cities we track, 6 have softer water and 3 have harder. The range nearby runs from 44 mg/L in Packanack Lake to 208 in Lake Hiawatha.
What 180 mg/L means at home
Expect white crust on faucets and showerheads, plus spots on dishes that come out of the dishwasher.
Kettles collect scale quickly. Water heaters build up sediment at the bottom of the tank, which makes them work harder over time.
Soap and detergent need a little more to lather, and soap scum shows up in the tub.
Hardness is not a health problem, and EPA sets no limit for it. It is a matter of scale and soap.
What to do about it
At 180 mg/L most of the trouble is scale, and only a few things deal with it.
Ion-exchange water softener
The standard whole-house fix. It swaps calcium and magnesium for sodium or potassium and needs salt plus a drain. Size it with the calculator below.
Salt-free conditioner
No salt and no drain line. It changes how minerals form scale instead of removing them, so water still tests hard.
Reverse osmosis or carbon filter
Under-sink reverse osmosis removes minerals from drinking water only. Plain carbon filters improve taste but do not soften.
3 people × 75 gallons a day × 10.5 gpg = 2,369 grains a day. A 24,000-grain unit regenerates about every 10 days.
EPA record for Pine Brook's water system
3 health-based violations since 2016
Serves about 22,000 people from surface water.
- Health-based
- 3
- Monitoring or reporting
- 6
- Open now
- 0
TapWaterData ties Pine Brook to this system. EPA's service-area records do not name Pine Brook, so check the utility printed on your water bill.
| Contaminant or rule | Violations | Period | Status |
|---|---|---|---|
| Surface Water Treatment Rulefiltration and disinfection | 3 | 2023–2025 | Resolved |
Health-based means a contaminant above its legal limit or a missed treatment step. Monitoring and reporting violations are late or missing tests and notices. Source: EPA ECHO, 2026Q3 export, violations with periods starting 2016 or later. Full EPA record.
Questions
Is Pine Brook water hard?
Yes. It measures about 180 mg/L (10.5 grains per gallon), which the USGS classes as hard.
What is the water hardness in Pine Brook in grains per gallon?
About 10.5 gpg. One grain per gallon equals 17.1 mg/L, so 180 mg/L divided by 17.1 gives 10.5.
What size water softener do I need in Pine Brook?
For 3 people using 75 gallons each per day, 10.5 gpg works out to about 2,369 grains a day. A 24,000-grain softener covers that with a regeneration about every 10 days.
Has the Pine Brook water system had EPA violations?
EPA records show 3 health-based violations for Montville TWP MUA since 2016, involving Surface Water Treatment Rule. There were also 6 monitoring or reporting violations, which are about late or missing tests and notices.
Nearby cities
- Lake Hiawatha208 mg/LVery hard
- Troy Hills208 mg/LVery hard
- Parsippany208 mg/LVery hard
- Towaco180 mg/LHard
- Boonton92 mg/LModerately hard
- Whippany148 mg/LHard
- Packanack Lake44 mg/LSoft
- Florham Park137 mg/LHard
- Morris Plains148 mg/LHard
- Upper Montclair46 mg/LSoft
Hardness data: TapWaterData US Water Hardness (utility report, September 23, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.