Hard water in Fair Lawn, NJ
Reported by Fair Lawn Water Dept · October 2025
- NJ typical
- 80 mg/L
- EPA health violations since 2016
- 3
- Softener for 3 people
- 24k grain
- Data
- Utility report
Fair Lawn water measures 137 mg/L (8.0 gpg) of hardness, hard by USGS standards. The number comes from Fair Lawn Water Dept, dated October 2025.
At 137 mg/L, Fair Lawn is 57 mg/L above the typical New Jersey figure of 80. Of the 10 nearest cities we track, 8 have softer water and 2 have harder. The range nearby runs from 5 mg/L in Hawthorne to 212 in Elmwood Park.
What 137 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 137 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 × 8.0 gpg = 1,802 grains a day. A 24,000-grain unit regenerates about every 13 days.
EPA record for Fair Lawn's water system
3 health-based violations since 2016
Serves about 35,564 people from surface water.
- Health-based
- 3
- Monitoring or reporting
- 54
- Open now
- 0
| Contaminant or rule | Violations | Period | Status |
|---|---|---|---|
| Surface Water Treatment Rulefiltration and disinfection | 2 | 2025 | Resolved |
| Lead and Copper Rulecorrosion control and lead sampling | 1 | 2024 | 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 Fair Lawn water hard?
Yes. It measures about 137 mg/L (8.0 grains per gallon), which the USGS classes as hard.
What is the water hardness in Fair Lawn in grains per gallon?
About 8.0 gpg. One grain per gallon equals 17.1 mg/L, so 137 mg/L divided by 17.1 gives 8.0.
What size water softener do I need in Fair Lawn?
For 3 people using 75 gallons each per day, 8.0 gpg works out to about 1,802 grains a day. A 24,000-grain softener covers that with a regeneration about every 13 days.
Has the Fair Lawn water system had EPA violations?
EPA records show 3 health-based violations for Fair Lawn Water Dept since 2016, involving Surface Water Treatment Rule, Lead and Copper Rule. There were also 54 monitoring or reporting violations, which are about late or missing tests and notices.
Nearby cities
- Glen Rock105 mg/LModerately hard
- Elmwood Park212 mg/LVery hard
- Hawthorne5 mg/LSoft
- Paramus96 mg/LModerately hard
- Paterson64 mg/LModerately hard
- Prospect Park64 mg/LModerately hard
- Ridgewood105 mg/LModerately hard
- Maywood96 mg/LModerately hard
- Garfield212 mg/LVery hard
- River Edge96 mg/LModerately hard
Hardness data: TapWaterData US Water Hardness (utility report, October 21, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.