Plainview, NY water hardness

Tap water hardness
54mg/L
3.2gpg
SoftReports range 43–54

Reported by Plainview WD · October 2025

NY typical
31 mg/L
EPA health violations since 2016
2
Data
Utility report

Tap water in Plainview has about 54 mg/L of hardness, which is 3.2 grains per gallon. On the USGS scale that counts as soft. The number comes from Plainview WD, dated October 2025. Reports for this system disagree, with values from 43 to 54 mg/L.

Plainview on the hardness scale, with nearby cities
060120180240300360+NY typical 31Bethpage: 10 mg/LBethpage 10Farmingdale: 10 mg/LFarmingdale 10Plainedge: 10 mg/LPlainedge 10East Farmingdale: 10 mg/LEast Farmingdale 10Levittown: 10 mg/LLevittown 10South Farmingdale: 10 mg/LSouth Farmingdale 10Hicksville: 18 mg/LHicksville 18Syosset: 24 mg/LSyosset 24Old Bethpage: 37 mg/LOld Bethpage 37New Cassel: 45 mg/LNew Cassel 45Plainview 54mg/L as calcium carbonate060120180240300360+NY 31Bethpage: 10 mg/LBethpage 10Farmingdale: 10 mg/LFarmingdale 10Plainedge: 10 mg/LPlainedge 10Hicksville: 18 mg/LHicksville 18Syosset: 24 mg/LSyosset 24Old Bethpage: 37 mg/LOld Bethpa. 3754 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

At 54 mg/L, Plainview is 23 mg/L above the typical New York figure of 31. None of the 10 nearest cities we track has harder water. The range nearby runs from 10 mg/L in Bethpage to 45 in New Cassel.

What 54 mg/L means at home

Soap and shampoo lather with very little product. Kettles and showerheads stay mostly free of white crust.

Some people notice that soap feels slow to rinse off in soft water. That slippery feel is normal and harmless.

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

Nothing, as far as hardness goes. At 54 mg/L a softener would have almost nothing to remove.

Carbon filter

If the water tastes of chlorine, a pitcher or faucet carbon filter takes care of that. It does not change hardness.

EPA record for Plainview's water system

Plainview WD · PWSID NY2902845

2 health-based violations since 2016

Serves about 34,000 people from groundwater.

Health-based
2
Monitoring or reporting
0
Open now
0
20162017201820192020202120222023202420252026Tetrachloroethylenecis-1,2-Dichloroethylene'16'18'20'22'24'26Tetrachloroethylenecis-1,2-Dichloroethylene
Each dot is one health-based violation, placed at the start of its compliance period.
Contaminant or ruleViolationsPeriodStatus
Tetrachloroethylene12017Resolved
cis-1,2-Dichloroethylene12017Resolved

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 Plainview water hard?

No. It measures about 54 mg/L (3.2 grains per gallon), which the USGS classes as soft.

What is the water hardness in Plainview in grains per gallon?

About 3.2 gpg. One grain per gallon equals 17.1 mg/L, so 54 mg/L divided by 17.1 gives 3.2.

Has the Plainview water system had EPA violations?

EPA records show 2 health-based violations for Plainview WD since 2016, involving Tetrachloroethylene, cis-1,2-Dichloroethylene.

Nearby cities

All 149 cities in New York

Hardness data: TapWaterData US Water Hardness (utility report, October 3, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.